Enable BLACK for internal_repo_rocksdb (#10710)

Summary:
Enable BLACK for internal_repo_rocksdb.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/10710

Reviewed By: riversand963, zsol

Differential Revision: D39666245

Pulled By: gitbw95

fbshipit-source-id: ef364318d2bbba66e96f3211dd6a975174d52c21

buckifier/buckify_rocksdb.py

@@ -1,19 +1,18 @@
 #!/usr/bin/env python3
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+from __future__ import absolute_import, division, print_function, unicode_literals
+
 try:
     from builtins import str
 except ImportError:
     from __builtin__ import str
-from targets_builder import TARGETSBuilder
+import fnmatch
 import json
 import os
-import fnmatch
 import sys
 
+from targets_builder import TARGETSBuilder
+
 from util import ColorString
 
 # This script generates TARGETS file for Buck.
@@ -44,13 +43,13 @@ def parse_src_mk(repo_path):
     src_files = {}
     for line in open(src_mk):
         line = line.strip()
-        if len(line) == 0 or line[0] == '#':
+        if len(line) == 0 or line[0] == "#":
             continue
-        if '=' in line:
-            current_src = line.split('=')[0].strip()
+        if "=" in line:
+            current_src = line.split("=")[0].strip()
             src_files[current_src] = []
-        elif '.c' in line:
-            src_path = line.split('\\')[0].strip()
+        elif ".c" in line:
+            src_path = line.split("\\")[0].strip()
             src_files[current_src].append(src_path)
     return src_files
 
@@ -58,14 +57,16 @@ def parse_src_mk(repo_path):
 # get all .cc / .c files
 def get_cc_files(repo_path):
     cc_files = []
-    for root, dirnames, filenames in os.walk(repo_path):  # noqa: B007 T25377293 Grandfathered in
-        root = root[(len(repo_path) + 1):]
+    for root, _dirnames, filenames in os.walk(
+        repo_path
+    ):  # noqa: B007 T25377293 Grandfathered in
+        root = root[(len(repo_path) + 1) :]
         if "java" in root:
             # Skip java
             continue
-        for filename in fnmatch.filter(filenames, '*.cc'):
+        for filename in fnmatch.filter(filenames, "*.cc"):
             cc_files.append(os.path.join(root, filename))
-        for filename in fnmatch.filter(filenames, '*.c'):
+        for filename in fnmatch.filter(filenames, "*.c"):
             cc_files.append(os.path.join(root, filename))
     return cc_files
 
@@ -93,14 +94,10 @@ def get_non_parallel_tests(repo_path):
 
     return s
 
+
 # Parse extra dependencies passed by user from command line
 def get_dependencies():
-    deps_map = {
-        '': {
-            'extra_deps': [],
-            'extra_compiler_flags': []
-        }
-    }
+    deps_map = {"": {"extra_deps": [], "extra_compiler_flags": []}}
     if len(sys.argv) < 2:
         return deps_map
 
@@ -111,6 +108,7 @@ def get_dependencies():
                 v = encode_dict(v)
             rv[k] = v
         return rv
+
     extra_deps = json.loads(sys.argv[1], object_hook=encode_dict)
     for target_alias, deps in extra_deps.items():
         deps_map[target_alias] = deps
@@ -143,73 +141,73 @@ def generate_targets(repo_path, deps_map):
         "rocksdb_lib",
         src_mk["LIB_SOURCES"] +
         # always add range_tree, it's only excluded on ppc64, which we don't use internally
-        src_mk["RANGE_TREE_SOURCES"] +
-        src_mk["TOOL_LIB_SOURCES"],
+        src_mk["RANGE_TREE_SOURCES"] + src_mk["TOOL_LIB_SOURCES"],
         deps=[
             "//folly/container:f14_hash",
             "//folly/experimental/coro:blocking_wait",
             "//folly/experimental/coro:collect",
             "//folly/experimental/coro:coroutine",
             "//folly/experimental/coro:task",
-            "//folly/synchronization:distributed_mutex"])
+            "//folly/synchronization:distributed_mutex",
+        ],
+    )
     # rocksdb_whole_archive_lib
     TARGETS.add_library(
         "rocksdb_whole_archive_lib",
         src_mk["LIB_SOURCES"] +
         # always add range_tree, it's only excluded on ppc64, which we don't use internally
-        src_mk["RANGE_TREE_SOURCES"] +
-        src_mk["TOOL_LIB_SOURCES"],
+        src_mk["RANGE_TREE_SOURCES"] + src_mk["TOOL_LIB_SOURCES"],
         deps=[
             "//folly/container:f14_hash",
             "//folly/experimental/coro:blocking_wait",
             "//folly/experimental/coro:collect",
             "//folly/experimental/coro:coroutine",
             "//folly/experimental/coro:task",
-            "//folly/synchronization:distributed_mutex"],
+            "//folly/synchronization:distributed_mutex",
+        ],
         headers=None,
         extra_external_deps="",
-        link_whole=True)
+        link_whole=True,
+    )
     # rocksdb_test_lib
     TARGETS.add_library(
         "rocksdb_test_lib",
-        src_mk.get("MOCK_LIB_SOURCES", []) +
-        src_mk.get("TEST_LIB_SOURCES", []) +
-        src_mk.get("EXP_LIB_SOURCES", []) +
-        src_mk.get("ANALYZER_LIB_SOURCES", []),
+        src_mk.get("MOCK_LIB_SOURCES", [])
+        + src_mk.get("TEST_LIB_SOURCES", [])
+        + src_mk.get("EXP_LIB_SOURCES", [])
+        + src_mk.get("ANALYZER_LIB_SOURCES", []),
         [":rocksdb_lib"],
-        extra_test_libs=True
-        )
+        extra_test_libs=True,
+    )
     # rocksdb_tools_lib
     TARGETS.add_library(
         "rocksdb_tools_lib",
-        src_mk.get("BENCH_LIB_SOURCES", []) +
-        src_mk.get("ANALYZER_LIB_SOURCES", []) +
-        ["test_util/testutil.cc"],
-        [":rocksdb_lib"])
+        src_mk.get("BENCH_LIB_SOURCES", [])
+        + src_mk.get("ANALYZER_LIB_SOURCES", [])
+        + ["test_util/testutil.cc"],
+        [":rocksdb_lib"],
+    )
     # rocksdb_cache_bench_tools_lib
     TARGETS.add_library(
         "rocksdb_cache_bench_tools_lib",
         src_mk.get("CACHE_BENCH_LIB_SOURCES", []),
-        [":rocksdb_lib"])
+        [":rocksdb_lib"],
+    )
     # rocksdb_stress_lib
     TARGETS.add_rocksdb_library(
         "rocksdb_stress_lib",
         src_mk.get("ANALYZER_LIB_SOURCES", [])
-        + src_mk.get('STRESS_LIB_SOURCES', [])
-        + ["test_util/testutil.cc"])
+        + src_mk.get("STRESS_LIB_SOURCES", [])
+        + ["test_util/testutil.cc"],
+    )
     # db_stress binary
-    TARGETS.add_binary("db_stress",
-                       ["db_stress_tool/db_stress.cc"],
-                       [":rocksdb_stress_lib"])
+    TARGETS.add_binary(
+        "db_stress", ["db_stress_tool/db_stress.cc"], [":rocksdb_stress_lib"]
+    )
     # bench binaries
     for src in src_mk.get("MICROBENCH_SOURCES", []):
-        name =  src.rsplit('/',1)[1].split('.')[0] if '/' in src else src.split('.')[0]
-        TARGETS.add_binary(
-            name,
-            [src],
-            [],
-            extra_bench_libs=True
-            )
+        name = src.rsplit("/", 1)[1].split(".")[0] if "/" in src else src.split(".")[0]
+        TARGETS.add_binary(name, [src], [], extra_bench_libs=True)
     print("Extra dependencies:\n{0}".format(json.dumps(deps_map)))
 
     # Dictionary test executable name -> relative source file path
@@ -219,7 +217,7 @@ def generate_targets(repo_path, deps_map):
     # are more than one .c test file, we need to extend
     # TARGETS.add_c_test() to include other C tests too.
     for test_src in src_mk.get("TEST_MAIN_SOURCES_C", []):
-        if test_src != 'db/c_test.c':
+        if test_src != "db/c_test.c":
             print("Don't know how to deal with " + test_src)
             return False
     TARGETS.add_c_test()
@@ -229,7 +227,7 @@ def generate_targets(repo_path, deps_map):
             fast_fancy_bench_config_list = json.load(json_file)
             for config_dict in fast_fancy_bench_config_list:
                 clean_benchmarks = {}
-                benchmarks = config_dict['benchmarks']
+                benchmarks = config_dict["benchmarks"]
                 for binary, benchmark_dict in benchmarks.items():
                     clean_benchmarks[binary] = {}
                     for benchmark, overloaded_metric_list in benchmark_dict.items():
@@ -237,13 +235,20 @@ def generate_targets(repo_path, deps_map):
                         for metric in overloaded_metric_list:
                             if not isinstance(metric, dict):
                                 clean_benchmarks[binary][benchmark].append(metric)
-                TARGETS.add_fancy_bench_config(config_dict['name'], clean_benchmarks, False, config_dict['expected_runtime_one_iter'], config_dict['sl_iterations'], config_dict['regression_threshold'])
+                TARGETS.add_fancy_bench_config(
+                    config_dict["name"],
+                    clean_benchmarks,
+                    False,
+                    config_dict["expected_runtime_one_iter"],
+                    config_dict["sl_iterations"],
+                    config_dict["regression_threshold"],
+                )
 
         with open(f"{repo_path}/buckifier/bench-slow.json") as json_file:
             slow_fancy_bench_config_list = json.load(json_file)
             for config_dict in slow_fancy_bench_config_list:
                 clean_benchmarks = {}
-                benchmarks = config_dict['benchmarks']
+                benchmarks = config_dict["benchmarks"]
                 for binary, benchmark_dict in benchmarks.items():
                     clean_benchmarks[binary] = {}
                     for benchmark, overloaded_metric_list in benchmark_dict.items():
@@ -252,7 +257,14 @@ def generate_targets(repo_path, deps_map):
                             if not isinstance(metric, dict):
                                 clean_benchmarks[binary][benchmark].append(metric)
             for config_dict in slow_fancy_bench_config_list:
-                TARGETS.add_fancy_bench_config(config_dict['name']+"_slow", clean_benchmarks, True, config_dict['expected_runtime_one_iter'], config_dict['sl_iterations'], config_dict['regression_threshold'])
+                TARGETS.add_fancy_bench_config(
+                    config_dict["name"] + "_slow",
+                    clean_benchmarks,
+                    True,
+                    config_dict["expected_runtime_one_iter"],
+                    config_dict["sl_iterations"],
+                    config_dict["regression_threshold"],
+                )
     # it is better servicelab experiments break
     # than rocksdb github ci
     except Exception:
@@ -261,7 +273,7 @@ def generate_targets(repo_path, deps_map):
     TARGETS.add_test_header()
 
     for test_src in src_mk.get("TEST_MAIN_SOURCES", []):
-        test = test_src.split('.c')[0].strip().split('/')[-1].strip()
+        test = test_src.split(".c")[0].strip().split("/")[-1].strip()
         test_source_map[test] = test_src
         print("" + test + " " + test_src)
 
@@ -271,23 +283,29 @@ def generate_targets(repo_path, deps_map):
                 print(ColorString.warning("Failed to get test name for %s" % test_src))
                 continue
 
-            test_target_name = \
-                test if not target_alias else test + "_" + target_alias
+            test_target_name = test if not target_alias else test + "_" + target_alias
 
             if test in _EXPORTED_TEST_LIBS:
                 test_library = "%s_lib" % test_target_name
-                TARGETS.add_library(test_library, [test_src], deps=[":rocksdb_test_lib"], extra_test_libs=True)
+                TARGETS.add_library(
+                    test_library,
+                    [test_src],
+                    deps=[":rocksdb_test_lib"],
+                    extra_test_libs=True,
+                )
                 TARGETS.register_test(
                     test_target_name,
                     test_src,
-                    deps = json.dumps(deps['extra_deps'] + [':'+test_library]),
-                    extra_compiler_flags = json.dumps(deps['extra_compiler_flags']))
+                    deps=json.dumps(deps["extra_deps"] + [":" + test_library]),
+                    extra_compiler_flags=json.dumps(deps["extra_compiler_flags"]),
+                )
             else:
                 TARGETS.register_test(
                     test_target_name,
                     test_src,
-                    deps = json.dumps(deps['extra_deps'] + [":rocksdb_test_lib"] ),
-                    extra_compiler_flags = json.dumps(deps['extra_compiler_flags']))
+                    deps=json.dumps(deps["extra_deps"] + [":rocksdb_test_lib"]),
+                    extra_compiler_flags=json.dumps(deps["extra_compiler_flags"]),
+                )
 
     print(ColorString.info("Generated TARGETS Summary:"))
     print(ColorString.info("- %d libs" % TARGETS.total_lib))
@@ -300,8 +318,7 @@ def get_rocksdb_path():
     # rocksdb = {script_dir}/..
     script_dir = os.path.dirname(sys.argv[0])
     script_dir = os.path.abspath(script_dir)
-    rocksdb_path = os.path.abspath(
-        os.path.join(script_dir, "../"))
+    rocksdb_path = os.path.abspath(os.path.join(script_dir, "../"))
 
     return rocksdb_path
 
@@ -318,5 +335,6 @@ def main():
     if not ok:
         exit_with_error("Failed to generate TARGETS files")
 
+
 if __name__ == "__main__":
     main()

buckifier/targets_builder.py

@@ -1,113 +1,150 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+from __future__ import absolute_import, division, print_function, unicode_literals
+
 try:
-    from builtins import object
-    from builtins import str
+    from builtins import object, str
 except ImportError:
-    from __builtin__ import object
-    from __builtin__ import str
-import targets_cfg
+    from __builtin__ import object, str
 import pprint
 
+import targets_cfg
+
+
 def pretty_list(lst, indent=8):
     if lst is None or len(lst) == 0:
         return ""
 
     if len(lst) == 1:
-        return "\"%s\"" % lst[0]
+        return '"%s"' % lst[0]
 
-    separator = "\",\n%s\"" % (" " * indent)
+    separator = '",\n%s"' % (" " * indent)
     res = separator.join(sorted(lst))
-    res = "\n" + (" " * indent) + "\"" + res + "\",\n" + (" " * (indent - 4))
+    res = "\n" + (" " * indent) + '"' + res + '",\n' + (" " * (indent - 4))
     return res
 
 
 class TARGETSBuilder(object):
     def __init__(self, path, extra_argv):
         self.path = path
-        self.targets_file = open(path, 'wb')
         header = targets_cfg.rocksdb_target_header_template.format(
-            extra_argv=extra_argv)
-        self.targets_file.write(header.encode("utf-8"))
+            extra_argv=extra_argv
+        )
+        with open(path, "wb") as targets_file:
+            targets_file.write(header.encode("utf-8"))
         self.total_lib = 0
         self.total_bin = 0
         self.total_test = 0
         self.tests_cfg = ""
 
-    def __del__(self):
-        self.targets_file.close()
-
-    def add_library(self, name, srcs, deps=None, headers=None,
-                    extra_external_deps="", link_whole=False,
-                     external_dependencies=None, extra_test_libs=False):
+    def add_library(
+        self,
+        name,
+        srcs,
+        deps=None,
+        headers=None,
+        extra_external_deps="",
+        link_whole=False,
+        external_dependencies=None,
+        extra_test_libs=False,
+    ):
         if headers is not None:
             headers = "[" + pretty_list(headers) + "]"
-        self.targets_file.write(targets_cfg.library_template.format(
-            name=name,
-            srcs=pretty_list(srcs),
-            headers=headers,
-            deps=pretty_list(deps),
-            extra_external_deps=extra_external_deps,
-            link_whole=link_whole,
-            external_dependencies=pretty_list(external_dependencies),
-            extra_test_libs=extra_test_libs
-            ).encode("utf-8"))
+        with open(self.path, "ab") as targets_file:
+            targets_file.write(
+                targets_cfg.library_template.format(
+                    name=name,
+                    srcs=pretty_list(srcs),
+                    headers=headers,
+                    deps=pretty_list(deps),
+                    extra_external_deps=extra_external_deps,
+                    link_whole=link_whole,
+                    external_dependencies=pretty_list(external_dependencies),
+                    extra_test_libs=extra_test_libs,
+                ).encode("utf-8")
+            )
         self.total_lib = self.total_lib + 1
 
-    def add_rocksdb_library(self, name, srcs, headers=None,
-                            external_dependencies=None):
+    def add_rocksdb_library(self, name, srcs, headers=None, external_dependencies=None):
         if headers is not None:
             headers = "[" + pretty_list(headers) + "]"
-        self.targets_file.write(targets_cfg.rocksdb_library_template.format(
-            name=name,
-            srcs=pretty_list(srcs),
-            headers=headers,
-            external_dependencies=pretty_list(external_dependencies)
-            ).encode("utf-8")
+        with open(self.path, "ab") as targets_file:
+            targets_file.write(
+                targets_cfg.rocksdb_library_template.format(
+                    name=name,
+                    srcs=pretty_list(srcs),
+                    headers=headers,
+                    external_dependencies=pretty_list(external_dependencies),
+                ).encode("utf-8")
             )
         self.total_lib = self.total_lib + 1
 
-    def add_binary(self, name, srcs, deps=None, extra_preprocessor_flags=None,extra_bench_libs=False):
-        self.targets_file.write(targets_cfg.binary_template.format(
-            name=name,
-            srcs=pretty_list(srcs),
-            deps=pretty_list(deps),
-            extra_preprocessor_flags=pretty_list(extra_preprocessor_flags),
-            extra_bench_libs=extra_bench_libs,
-            ).encode("utf-8"))
+    def add_binary(
+        self,
+        name,
+        srcs,
+        deps=None,
+        extra_preprocessor_flags=None,
+        extra_bench_libs=False,
+    ):
+        with open(self.path, "ab") as targets_file:
+            targets_file.write(
+                targets_cfg.binary_template.format(
+                    name=name,
+                    srcs=pretty_list(srcs),
+                    deps=pretty_list(deps),
+                    extra_preprocessor_flags=pretty_list(extra_preprocessor_flags),
+                    extra_bench_libs=extra_bench_libs,
+                ).encode("utf-8")
+            )
         self.total_bin = self.total_bin + 1
 
     def add_c_test(self):
-        self.targets_file.write(b"""
+        with open(self.path, "ab") as targets_file:
+            targets_file.write(
+                b"""
 add_c_test_wrapper()
-""")
+"""
+            )
 
     def add_test_header(self):
-        self.targets_file.write(b"""
+        with open(self.path, "ab") as targets_file:
+            targets_file.write(
+                b"""
         # Generate a test rule for each entry in ROCKS_TESTS
         # Do not build the tests in opt mode, since SyncPoint and other test code
         # will not be included.
-""")
+"""
+            )
 
-    def add_fancy_bench_config(self, name, bench_config, slow, expected_runtime, sl_iterations, regression_threshold):
-        self.targets_file.write(targets_cfg.fancy_bench_template.format(
+    def add_fancy_bench_config(
+        self,
+        name,
+        bench_config,
+        slow,
+        expected_runtime,
+        sl_iterations,
+        regression_threshold,
+    ):
+        with open(self.path, "ab") as targets_file:
+            targets_file.write(
+                targets_cfg.fancy_bench_template.format(
                     name=name,
                     bench_config=pprint.pformat(bench_config),
                     slow=slow,
                     expected_runtime=expected_runtime,
                     sl_iterations=sl_iterations,
-                    regression_threshold=regression_threshold
-                    ).encode("utf-8"))
-
-    def register_test(self,
-                      test_name,
-                      src,
-                      deps,
-                      extra_compiler_flags):
+                    regression_threshold=regression_threshold,
+                ).encode("utf-8")
+            )
 
-        self.targets_file.write(targets_cfg.unittests_template.format(test_name=test_name,test_cc=str(src),deps=deps,
-            extra_compiler_flags=extra_compiler_flags).encode("utf-8"))
+    def register_test(self, test_name, src, deps, extra_compiler_flags):
+        with open(self.path, "ab") as targets_file:
+            targets_file.write(
+                targets_cfg.unittests_template.format(
+                    test_name=test_name,
+                    test_cc=str(src),
+                    deps=deps,
+                    extra_compiler_flags=extra_compiler_flags,
+                ).encode("utf-8")
+            )
         self.total_test = self.total_test + 1

buckifier/targets_cfg.py

@@ -1,11 +1,7 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+from __future__ import absolute_import, division, print_function, unicode_literals
 
-rocksdb_target_header_template = \
-    """# This file \100generated by:
+rocksdb_target_header_template = """# This file \100generated by:
 #$ python3 buckifier/buckify_rocksdb.py{extra_argv}
 # --> DO NOT EDIT MANUALLY <--
 # This file is a Facebook-specific integration for buck builds, so can
@@ -27,7 +23,6 @@ rocks_cpp_library_wrapper(name="{name}", srcs=[{srcs}], headers={headers})
 """
 
 
-
 binary_template = """
 cpp_binary_wrapper(name="{name}", srcs=[{srcs}], deps=[{deps}], extra_preprocessor_flags=[{extra_preprocessor_flags}], extra_bench_libs={extra_bench_libs})
 """

buckifier/util.py

@@ -2,37 +2,35 @@
 """
 This module keeps commonly used components.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+from __future__ import absolute_import, division, print_function, unicode_literals
+
 try:
     from builtins import object
 except ImportError:
     from __builtin__ import object
+import os
 import subprocess
 import sys
-import os
 import time
 
+
 class ColorString(object):
-    """ Generate colorful strings on terminal """
-    HEADER = '\033[95m'
-    BLUE = '\033[94m'
-    GREEN = '\033[92m'
-    WARNING = '\033[93m'
-    FAIL = '\033[91m'
-    ENDC = '\033[0m'
+    """Generate colorful strings on terminal"""
+
+    HEADER = "\033[95m"
+    BLUE = "\033[94m"
+    GREEN = "\033[92m"
+    WARNING = "\033[93m"
+    FAIL = "\033[91m"
+    ENDC = "\033[0m"
 
     @staticmethod
     def _make_color_str(text, color):
         # In Python2, default encoding for unicode string is ASCII
         if sys.version_info.major <= 2:
-            return "".join(
-                [color, text.encode('utf-8'), ColorString.ENDC])
+            return "".join([color, text.encode("utf-8"), ColorString.ENDC])
         # From Python3, default encoding for unicode string is UTF-8
-        return "".join(
-            [color, text, ColorString.ENDC])
+        return "".join([color, text, ColorString.ENDC])
 
     @staticmethod
     def ok(text):
@@ -68,37 +66,38 @@ class ColorString(object):
 
 
 def run_shell_command(shell_cmd, cmd_dir=None):
-    """ Run a single shell command.
-        @returns a tuple of shell command return code, stdout, stderr """
+    """Run a single shell command.
+    @returns a tuple of shell command return code, stdout, stderr"""
 
     if cmd_dir is not None and not os.path.exists(cmd_dir):
         run_shell_command("mkdir -p %s" % cmd_dir)
 
     start = time.time()
     print("\t>>> Running: " + shell_cmd)
-    p = subprocess.Popen(shell_cmd,
-                         shell=True,
-                         stdout=subprocess.PIPE,
-                         stderr=subprocess.PIPE,
-                         cwd=cmd_dir)
+    p = subprocess.Popen(  # noqa
+        shell_cmd,
+        shell=True,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        cwd=cmd_dir,
+    )
     stdout, stderr = p.communicate()
     end = time.time()
 
     # Report time if we spent more than 5 minutes executing a command
     execution_time = end - start
     if execution_time > (60 * 5):
-        mins = (execution_time / 60)
-        secs = (execution_time % 60)
+        mins = execution_time / 60
+        secs = execution_time % 60
         print("\t>time spent: %d minutes %d seconds" % (mins, secs))
 
-
     return p.returncode, stdout, stderr
 
 
 def run_shell_commands(shell_cmds, cmd_dir=None, verbose=False):
-    """ Execute a sequence of shell commands, which is equivalent to
-        running `cmd1 && cmd2 && cmd3`
-        @returns boolean indication if all commands succeeds.
+    """Execute a sequence of shell commands, which is equivalent to
+    running `cmd1 && cmd2 && cmd3`
+    @returns boolean indication if all commands succeeds.
     """
 
     if cmd_dir:

build_tools/amalgamate.py

@@ -28,14 +28,15 @@
 from __future__ import print_function
 
 import argparse
-from os import path
 import re
 import sys
+from os import path
 
 include_re = re.compile('^[ \t]*#include[ \t]+"(.*)"[ \t]*$')
 included = set()
 excluded = set()
 
+
 def find_header(name, abs_path, include_paths):
     samedir = path.join(path.dirname(abs_path), name)
     if path.exists(samedir):
@@ -46,17 +47,31 @@ def find_header(name, abs_path, include_paths):
             return include_path
     return None
 
-def expand_include(include_path, f, abs_path, source_out, header_out, include_paths, public_include_paths):
+
+def expand_include(
+    include_path,
+    f,
+    abs_path,
+    source_out,
+    header_out,
+    include_paths,
+    public_include_paths,
+):
     if include_path in included:
         return False
 
     included.add(include_path)
     with open(include_path) as f:
         print('#line 1 "{}"'.format(include_path), file=source_out)
-        process_file(f, include_path, source_out, header_out, include_paths, public_include_paths)
+        process_file(
+            f, include_path, source_out, header_out, include_paths, public_include_paths
+        )
     return True
 
-def process_file(f, abs_path, source_out, header_out, include_paths, public_include_paths):
+
+def process_file(
+    f, abs_path, source_out, header_out, include_paths, public_include_paths
+):
     for (line, text) in enumerate(f):
         m = include_re.match(text)
         if m:
@@ -68,7 +83,15 @@ def process_file(f, abs_path, source_out, header_out, include_paths, public_incl
                     source_out.write(text)
                     expanded = False
                 else:
-                    expanded = expand_include(include_path, f, abs_path, source_out, header_out, include_paths, public_include_paths)
+                    expanded = expand_include(
+                        include_path,
+                        f,
+                        abs_path,
+                        source_out,
+                        header_out,
+                        include_paths,
+                        public_include_paths,
+                    )
             else:
                 # now try public headers
                 include_path = find_header(filename, abs_path, public_include_paths)
@@ -78,23 +101,52 @@ def process_file(f, abs_path, source_out, header_out, include_paths, public_incl
                     if include_path in excluded:
                         source_out.write(text)
                     else:
-                        expand_include(include_path, f, abs_path, header_out, None, public_include_paths, [])
+                        expand_include(
+                            include_path,
+                            f,
+                            abs_path,
+                            header_out,
+                            None,
+                            public_include_paths,
+                            [],
+                        )
                 else:
-                    sys.exit("unable to find {}, included in {} on line {}".format(filename, abs_path, line))
+                    sys.exit(
+                        "unable to find {}, included in {} on line {}".format(
+                            filename, abs_path, line
+                        )
+                    )
 
             if expanded:
-                print('#line {} "{}"'.format(line+1, abs_path), file=source_out)
+                print('#line {} "{}"'.format(line + 1, abs_path), file=source_out)
         elif text != "#pragma once\n":
             source_out.write(text)
 
+
 def main():
-    parser = argparse.ArgumentParser(description="Transform a unity build into an amalgamation")
+    parser = argparse.ArgumentParser(
+        description="Transform a unity build into an amalgamation"
+    )
     parser.add_argument("source", help="source file")
-    parser.add_argument("-I", action="append", dest="include_paths", help="include paths for private headers")
-    parser.add_argument("-i", action="append", dest="public_include_paths", help="include paths for public headers")
-    parser.add_argument("-x", action="append", dest="excluded", help="excluded header files")
+    parser.add_argument(
+        "-I",
+        action="append",
+        dest="include_paths",
+        help="include paths for private headers",
+    )
+    parser.add_argument(
+        "-i",
+        action="append",
+        dest="public_include_paths",
+        help="include paths for public headers",
+    )
+    parser.add_argument(
+        "-x", action="append", dest="excluded", help="excluded header files"
+    )
     parser.add_argument("-o", dest="source_out", help="output C++ file", required=True)
-    parser.add_argument("-H", dest="header_out", help="output C++ header file", required=True)
+    parser.add_argument(
+        "-H", dest="header_out", help="output C++ header file", required=True
+    )
     args = parser.parse_args()
 
     include_paths = list(map(path.abspath, args.include_paths or []))
@@ -102,10 +154,15 @@ def main():
     excluded.update(map(path.abspath, args.excluded or []))
     filename = args.source
     abs_path = path.abspath(filename)
-    with open(filename) as f, open(args.source_out, 'w') as source_out, open(args.header_out, 'w') as header_out:
+    with open(filename) as f, open(args.source_out, "w") as source_out, open(
+        args.header_out, "w"
+    ) as header_out:
         print('#line 1 "{}"'.format(filename), file=source_out)
         print('#include "{}"'.format(header_out.name), file=source_out)
-        process_file(f, abs_path, source_out, header_out, include_paths, public_include_paths)
+        process_file(
+            f, abs_path, source_out, header_out, include_paths, public_include_paths
+        )
+
 
 if __name__ == "__main__":
     main()

build_tools/benchmark_log_tool.py

@@ -4,23 +4,27 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
-'''Access the results of benchmark runs
+"""Access the results of benchmark runs
 Send these results on to OpenSearch graphing service
-'''
+"""
 
 import argparse
 import itertools
+import logging
 import os
 import re
 import sys
+
 import requests
 from dateutil import parser
-import logging
 
 logging.basicConfig(level=logging.DEBUG)
+
+
 class Configuration:
-    opensearch_user = os.environ['ES_USER']
-    opensearch_pass = os.environ['ES_PASS']
+    opensearch_user = os.environ["ES_USER"]
+    opensearch_pass = os.environ["ES_PASS"]
+
 
 class BenchmarkResultException(Exception):
     def __init__(self, message, content):
@@ -30,45 +34,71 @@ class BenchmarkResultException(Exception):
 
 class BenchmarkUtils:
 
-    expected_keys = ['ops_sec', 'mb_sec',  'lsm_sz',  'blob_sz', 'c_wgb',   'w_amp',
-    'c_mbps',  'c_wsecs', 'c_csecs', 'b_rgb',   'b_wgb',   'usec_op',
-    'p50',     'p99',     'p99.9',   'p99.99', 'pmax',
-    'uptime',  'stall%', 'Nstall',  'u_cpu',   's_cpu',   'rss', 'test', 'date', 'version', 'job_id']
+    expected_keys = [
+        "ops_sec",
+        "mb_sec",
+        "lsm_sz",
+        "blob_sz",
+        "c_wgb",
+        "w_amp",
+        "c_mbps",
+        "c_wsecs",
+        "c_csecs",
+        "b_rgb",
+        "b_wgb",
+        "usec_op",
+        "p50",
+        "p99",
+        "p99.9",
+        "p99.99",
+        "pmax",
+        "uptime",
+        "stall%",
+        "Nstall",
+        "u_cpu",
+        "s_cpu",
+        "rss",
+        "test",
+        "date",
+        "version",
+        "job_id",
+    ]
 
     def sanity_check(row):
-        if not 'test' in row:
+        if "test" not in row:
             logging.debug(f"not 'test' in row: {row}")
             return False
-        if row['test'] == '':
+        if row["test"] == "":
             logging.debug(f"row['test'] == '': {row}")
             return False
-        if not 'date' in row:
+        if "date" not in row:
             logging.debug(f"not 'date' in row: {row}")
             return False
-        if not 'ops_sec' in row:
+        if "ops_sec" not in row:
             logging.debug(f"not 'ops_sec' in row: {row}")
             return False
         try:
-            v = int(row['ops_sec'])
+            _ = int(row["ops_sec"])
         except (ValueError, TypeError):
             logging.debug(f"int(row['ops_sec']): {row}")
             return False
         try:
-            (_, _) = parser.parse(row['date'], fuzzy_with_tokens=True)
+            (_, _) = parser.parse(row["date"], fuzzy_with_tokens=True)
         except (parser.ParserError):
-            logging.error(f"parser.parse((row['date']): not a valid format for date in row: {row}")
+            logging.error(
+                f"parser.parse((row['date']): not a valid format for date in row: {row}"
+            )
             return False
         return True
 
     def conform_opensearch(row):
-        (dt, _) = parser.parse(row['date'], fuzzy_with_tokens=True)
+        (dt, _) = parser.parse(row["date"], fuzzy_with_tokens=True)
         # create a test_date field, which was previously what was expected
         # repair the date field, which has what can be a WRONG ISO FORMAT, (no leading 0 on single-digit day-of-month)
         # e.g. 2022-07-1T00:14:55 should be 2022-07-01T00:14:55
-        row['test_date'] = dt.isoformat()
-        row['date'] = dt.isoformat()
-        return dict((key.replace('.', '_'), value)
-                    for (key, value) in row.items())
+        row["test_date"] = dt.isoformat()
+        row["date"] = dt.isoformat()
+        return {key.replace(".", "_") : value for key, value in row.items()}
 
 
 class ResultParser:
@@ -80,24 +110,24 @@ class ResultParser:
     def ignore(self, l_in: str):
         if len(l_in) == 0:
             return True
-        if l_in[0:1] == '#':
+        if l_in[0:1] == "#":
             return True
         return False
 
-    def line(self, l_in: str):
-        '''Parse a line into items
+    def line(self, line_in: str):
+        """Parse a line into items
         Being clever about separators
-        '''
-        l = l_in
+        """
+        line = line_in
         row = []
-        while l != '':
-            match_item = self.field.match(l)
+        while line != "":
+            match_item = self.field.match(line)
             if match_item:
                 item = match_item.group(0)
                 row.append(item)
-                l = l[len(item):]
+                line = line[len(item) :]
             else:
-                match_intra = self.intra.match(l)
+                match_intra = self.intra.match(line)
                 if match_intra:
                     intra = match_intra.group(0)
                     # Count the separators
@@ -107,26 +137,27 @@ class ResultParser:
                     sep_count = len(tabbed) - 1
                     if sep_count == 0:
                         sep_count = 1
-                    for i in range(sep_count-1):
-                        row.append('')
-                    l = l[len(intra):]
+                    for _ in range(sep_count - 1):
+                        row.append("")
+                    line = line[len(intra) :]
                 else:
-                    raise BenchmarkResultException(
-                        'Invalid TSV line', f"{l_in} at {l}")
+                    raise BenchmarkResultException("Invalid TSV line", f"{line_in} at {line}")
         return row
 
     def parse(self, lines):
-        '''Parse something that iterates lines'''
+        """Parse something that iterates lines"""
         rows = [self.line(line) for line in lines if not self.ignore(line)]
         header = rows[0]
         width = len(header)
-        records = [{k: v for (k, v) in itertools.zip_longest(
-            header, row[:width])} for row in rows[1:]]
+        records = [
+            {k: v for (k, v) in itertools.zip_longest(header, row[:width])}
+            for row in rows[1:]
+        ]
         return records
 
 
 def load_report_from_tsv(filename: str):
-    file = open(filename, 'r')
+    file = open(filename, "r")
     contents = file.readlines()
     file.close()
     parser = ResultParser()
@@ -136,52 +167,70 @@ def load_report_from_tsv(filename: str):
 
 
 def push_report_to_opensearch(report, esdocument):
-    sanitized = [BenchmarkUtils.conform_opensearch(row)
-                 for row in report if BenchmarkUtils.sanity_check(row)]
-    logging.debug(f"upload {len(sanitized)} sane of {len(report)} benchmarks to opensearch")
+    sanitized = [
+        BenchmarkUtils.conform_opensearch(row)
+        for row in report
+        if BenchmarkUtils.sanity_check(row)
+    ]
+    logging.debug(
+        f"upload {len(sanitized)} sane of {len(report)} benchmarks to opensearch"
+    )
     for single_benchmark in sanitized:
         logging.debug(f"upload benchmark: {single_benchmark}")
         response = requests.post(
             esdocument,
-            json=single_benchmark, auth=(os.environ['ES_USER'], os.environ['ES_PASS']))
+            json=single_benchmark,
+            auth=(os.environ["ES_USER"], os.environ["ES_PASS"]),
+        )
         logging.debug(
-            f"Sent to OpenSearch, status: {response.status_code}, result: {response.text}")
+            f"Sent to OpenSearch, status: {response.status_code}, result: {response.text}"
+        )
         response.raise_for_status()
 
+
 def push_report_to_null(report):
-    
+
     for row in report:
         if BenchmarkUtils.sanity_check(row):
             logging.debug(f"row {row}")
             conformed = BenchmarkUtils.conform_opensearch(row)
             logging.debug(f"conformed row {conformed}")
 
+
 def main():
-    '''Tool for fetching, parsing and uploading benchmark results to OpenSearch / ElasticSearch
+    """Tool for fetching, parsing and uploading benchmark results to OpenSearch / ElasticSearch
     This tool will
 
     (1) Open a local tsv benchmark report file
     (2) Upload to OpenSearch document, via https/JSON
-    '''
+    """
 
-    parser = argparse.ArgumentParser(
-        description='CircleCI benchmark scraper.')
+    parser = argparse.ArgumentParser(description="CircleCI benchmark scraper.")
 
     # --tsvfile is the name of the file to read results from
     # --esdocument is the ElasticSearch document to push these results into
     #
-    parser.add_argument('--tsvfile', default='build_tools/circle_api_scraper_input.txt',
-                        help='File from which to read tsv report')
-    parser.add_argument('--esdocument', help='ElasticSearch/OpenSearch document URL to upload report into')
-    parser.add_argument('--upload', choices=['opensearch', 'none'], default='opensearch')
+    parser.add_argument(
+        "--tsvfile",
+        default="build_tools/circle_api_scraper_input.txt",
+        help="File from which to read tsv report",
+    )
+    parser.add_argument(
+        "--esdocument",
+        help="ElasticSearch/OpenSearch document URL to upload report into",
+    )
+    parser.add_argument(
+        "--upload", choices=["opensearch", "none"], default="opensearch"
+    )
 
     args = parser.parse_args()
     logging.debug(f"Arguments: {args}")
     reports = load_report_from_tsv(args.tsvfile)
-    if (args.upload == 'opensearch'):
+    if args.upload == "opensearch":
         push_report_to_opensearch(reports, args.esdocument)
     else:
         push_report_to_null(reports)
 
-if __name__ == '__main__':
+
+if __name__ == "__main__":
     sys.exit(main())

build_tools/error_filter.py

@@ -3,16 +3,13 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
-'''Filter for error messages in test output:
+"""Filter for error messages in test output:
     - Receives merged stdout/stderr from test on stdin
     - Finds patterns of known error messages for test name (first argument)
     - Prints those error messages to stdout
-'''
+"""
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
+from __future__ import absolute_import, division, print_function, unicode_literals
 
 import re
 import sys
@@ -20,23 +17,24 @@ import sys
 
 class ErrorParserBase(object):
     def parse_error(self, line):
-        '''Parses a line of test output. If it contains an error, returns a
+        """Parses a line of test output. If it contains an error, returns a
         formatted message describing the error; otherwise, returns None.
         Subclasses must override this method.
-        '''
+        """
         raise NotImplementedError
 
 
 class GTestErrorParser(ErrorParserBase):
-    '''A parser that remembers the last test that began running so it can print
+    """A parser that remembers the last test that began running so it can print
     that test's name upon detecting failure.
-    '''
-    _GTEST_NAME_PATTERN = re.compile(r'\[ RUN      \] (\S+)$')
+    """
+
+    _GTEST_NAME_PATTERN = re.compile(r"\[ RUN      \] (\S+)$")
     # format: '<filename or "unknown file">:<line #>: Failure'
-    _GTEST_FAIL_PATTERN = re.compile(r'(unknown file|\S+:\d+): Failure$')
+    _GTEST_FAIL_PATTERN = re.compile(r"(unknown file|\S+:\d+): Failure$")
 
     def __init__(self):
-        self._last_gtest_name = 'Unknown test'
+        self._last_gtest_name = "Unknown test"
 
     def parse_error(self, line):
         gtest_name_match = self._GTEST_NAME_PATTERN.match(line)
@@ -45,14 +43,13 @@ class GTestErrorParser(ErrorParserBase):
             return None
         gtest_fail_match = self._GTEST_FAIL_PATTERN.match(line)
         if gtest_fail_match:
-            return '%s failed: %s' % (
-                    self._last_gtest_name, gtest_fail_match.group(1))
+            return "%s failed: %s" % (self._last_gtest_name, gtest_fail_match.group(1))
         return None
 
 
 class MatchErrorParser(ErrorParserBase):
-    '''A simple parser that returns the whole line if it matches the pattern.
-    '''
+    """A simple parser that returns the whole line if it matches the pattern."""
+
     def __init__(self, pattern):
         self._pattern = re.compile(pattern)
 
@@ -69,97 +66,104 @@ class CompilerErrorParser(MatchErrorParser):
         # format (link error):
         #   '<filename>:<line #>: error: <error msg>'
         # The below regex catches both
-        super(CompilerErrorParser, self).__init__(r'\S+:\d+: error:')
+        super(CompilerErrorParser, self).__init__(r"\S+:\d+: error:")
 
 
 class ScanBuildErrorParser(MatchErrorParser):
     def __init__(self):
-        super(ScanBuildErrorParser, self).__init__(
-                r'scan-build: \d+ bugs found.$')
+        super(ScanBuildErrorParser, self).__init__(r"scan-build: \d+ bugs found.$")
 
 
 class DbCrashErrorParser(MatchErrorParser):
     def __init__(self):
-        super(DbCrashErrorParser, self).__init__(r'\*\*\*.*\^$|TEST FAILED.')
+        super(DbCrashErrorParser, self).__init__(r"\*\*\*.*\^$|TEST FAILED.")
 
 
 class WriteStressErrorParser(MatchErrorParser):
     def __init__(self):
         super(WriteStressErrorParser, self).__init__(
-                r'ERROR: write_stress died with exitcode=\d+')
+            r"ERROR: write_stress died with exitcode=\d+"
+        )
 
 
 class AsanErrorParser(MatchErrorParser):
     def __init__(self):
-        super(AsanErrorParser, self).__init__(
-                r'==\d+==ERROR: AddressSanitizer:')
+        super(AsanErrorParser, self).__init__(r"==\d+==ERROR: AddressSanitizer:")
 
 
 class UbsanErrorParser(MatchErrorParser):
     def __init__(self):
         # format: '<filename>:<line #>:<column #>: runtime error: <error msg>'
-        super(UbsanErrorParser, self).__init__(r'\S+:\d+:\d+: runtime error:')
+        super(UbsanErrorParser, self).__init__(r"\S+:\d+:\d+: runtime error:")
 
 
 class ValgrindErrorParser(MatchErrorParser):
     def __init__(self):
         # just grab the summary, valgrind doesn't clearly distinguish errors
         # from other log messages.
-        super(ValgrindErrorParser, self).__init__(r'==\d+== ERROR SUMMARY:')
+        super(ValgrindErrorParser, self).__init__(r"==\d+== ERROR SUMMARY:")
 
 
 class CompatErrorParser(MatchErrorParser):
     def __init__(self):
-        super(CompatErrorParser, self).__init__(r'==== .*[Ee]rror.* ====$')
+        super(CompatErrorParser, self).__init__(r"==== .*[Ee]rror.* ====$")
 
 
 class TsanErrorParser(MatchErrorParser):
     def __init__(self):
-        super(TsanErrorParser, self).__init__(r'WARNING: ThreadSanitizer:')
+        super(TsanErrorParser, self).__init__(r"WARNING: ThreadSanitizer:")
 
 
 _TEST_NAME_TO_PARSERS = {
-    'punit': [CompilerErrorParser, GTestErrorParser],
-    'unit': [CompilerErrorParser, GTestErrorParser],
-    'release': [CompilerErrorParser, GTestErrorParser],
-    'unit_481': [CompilerErrorParser, GTestErrorParser],
-    'release_481': [CompilerErrorParser, GTestErrorParser],
-    'clang_unit': [CompilerErrorParser, GTestErrorParser],
-    'clang_release': [CompilerErrorParser, GTestErrorParser],
-    'clang_analyze': [CompilerErrorParser, ScanBuildErrorParser],
-    'code_cov': [CompilerErrorParser, GTestErrorParser],
-    'unity': [CompilerErrorParser, GTestErrorParser],
-    'lite': [CompilerErrorParser],
-    'lite_test': [CompilerErrorParser, GTestErrorParser],
-    'stress_crash': [CompilerErrorParser, DbCrashErrorParser],
-    'stress_crash_with_atomic_flush': [CompilerErrorParser, DbCrashErrorParser],
-    'stress_crash_with_txn': [CompilerErrorParser, DbCrashErrorParser],
-    'write_stress': [CompilerErrorParser, WriteStressErrorParser],
-    'asan': [CompilerErrorParser, GTestErrorParser, AsanErrorParser],
-    'asan_crash': [CompilerErrorParser, AsanErrorParser, DbCrashErrorParser],
-    'asan_crash_with_atomic_flush': [CompilerErrorParser, AsanErrorParser, DbCrashErrorParser],
-    'asan_crash_with_txn': [CompilerErrorParser, AsanErrorParser, DbCrashErrorParser],
-    'ubsan': [CompilerErrorParser, GTestErrorParser, UbsanErrorParser],
-    'ubsan_crash': [CompilerErrorParser, UbsanErrorParser, DbCrashErrorParser],
-    'ubsan_crash_with_atomic_flush': [CompilerErrorParser, UbsanErrorParser, DbCrashErrorParser],
-    'ubsan_crash_with_txn': [CompilerErrorParser, UbsanErrorParser, DbCrashErrorParser],
-    'valgrind': [CompilerErrorParser, GTestErrorParser, ValgrindErrorParser],
-    'tsan': [CompilerErrorParser, GTestErrorParser, TsanErrorParser],
-    'format_compatible': [CompilerErrorParser, CompatErrorParser],
-    'run_format_compatible': [CompilerErrorParser, CompatErrorParser],
-    'no_compression': [CompilerErrorParser, GTestErrorParser],
-    'run_no_compression': [CompilerErrorParser, GTestErrorParser],
-    'regression': [CompilerErrorParser],
-    'run_regression': [CompilerErrorParser],
+    "punit": [CompilerErrorParser, GTestErrorParser],
+    "unit": [CompilerErrorParser, GTestErrorParser],
+    "release": [CompilerErrorParser, GTestErrorParser],
+    "unit_481": [CompilerErrorParser, GTestErrorParser],
+    "release_481": [CompilerErrorParser, GTestErrorParser],
+    "clang_unit": [CompilerErrorParser, GTestErrorParser],
+    "clang_release": [CompilerErrorParser, GTestErrorParser],
+    "clang_analyze": [CompilerErrorParser, ScanBuildErrorParser],
+    "code_cov": [CompilerErrorParser, GTestErrorParser],
+    "unity": [CompilerErrorParser, GTestErrorParser],
+    "lite": [CompilerErrorParser],
+    "lite_test": [CompilerErrorParser, GTestErrorParser],
+    "stress_crash": [CompilerErrorParser, DbCrashErrorParser],
+    "stress_crash_with_atomic_flush": [CompilerErrorParser, DbCrashErrorParser],
+    "stress_crash_with_txn": [CompilerErrorParser, DbCrashErrorParser],
+    "write_stress": [CompilerErrorParser, WriteStressErrorParser],
+    "asan": [CompilerErrorParser, GTestErrorParser, AsanErrorParser],
+    "asan_crash": [CompilerErrorParser, AsanErrorParser, DbCrashErrorParser],
+    "asan_crash_with_atomic_flush": [
+        CompilerErrorParser,
+        AsanErrorParser,
+        DbCrashErrorParser,
+    ],
+    "asan_crash_with_txn": [CompilerErrorParser, AsanErrorParser, DbCrashErrorParser],
+    "ubsan": [CompilerErrorParser, GTestErrorParser, UbsanErrorParser],
+    "ubsan_crash": [CompilerErrorParser, UbsanErrorParser, DbCrashErrorParser],
+    "ubsan_crash_with_atomic_flush": [
+        CompilerErrorParser,
+        UbsanErrorParser,
+        DbCrashErrorParser,
+    ],
+    "ubsan_crash_with_txn": [CompilerErrorParser, UbsanErrorParser, DbCrashErrorParser],
+    "valgrind": [CompilerErrorParser, GTestErrorParser, ValgrindErrorParser],
+    "tsan": [CompilerErrorParser, GTestErrorParser, TsanErrorParser],
+    "format_compatible": [CompilerErrorParser, CompatErrorParser],
+    "run_format_compatible": [CompilerErrorParser, CompatErrorParser],
+    "no_compression": [CompilerErrorParser, GTestErrorParser],
+    "run_no_compression": [CompilerErrorParser, GTestErrorParser],
+    "regression": [CompilerErrorParser],
+    "run_regression": [CompilerErrorParser],
 }
 
 
 def main():
     if len(sys.argv) != 2:
-        return 'Usage: %s <test name>' % sys.argv[0]
+        return "Usage: %s <test name>" % sys.argv[0]
     test_name = sys.argv[1]
     if test_name not in _TEST_NAME_TO_PARSERS:
-        return 'Unknown test name: %s' % test_name
+        return "Unknown test name: %s" % test_name
 
     error_parsers = []
     for parser_cls in _TEST_NAME_TO_PARSERS[test_name]:
@@ -173,5 +177,5 @@ def main():
                 print(error_msg)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     sys.exit(main())

coverage/parse_gcov_output.py

@@ -47,35 +47,39 @@ def parse_gcov_report(gcov_input):
 
     return per_file_coverage, total_coverage
 
+
 def get_option_parser():
-    usage = "Parse the gcov output and generate more human-readable code " +\
-            "coverage report."
+    usage = (
+        "Parse the gcov output and generate more human-readable code "
+        + "coverage report."
+    )
     parser = optparse.OptionParser(usage)
 
     parser.add_option(
-        "--interested-files", "-i",
+        "--interested-files",
+        "-i",
         dest="filenames",
-        help="Comma separated files names. if specified, we will display " +
-             "the coverage report only for interested source files. " +
-             "Otherwise we will display the coverage report for all " +
-             "source files."
+        help="Comma separated files names. if specified, we will display "
+        + "the coverage report only for interested source files. "
+        + "Otherwise we will display the coverage report for all "
+        + "source files.",
     )
     return parser
 
+
 def display_file_coverage(per_file_coverage, total_coverage):
     # To print out auto-adjustable column, we need to know the longest
     # length of file names.
-    max_file_name_length = max(
-        len(fname) for fname in per_file_coverage.keys()
-    )
+    max_file_name_length = max(len(fname) for fname in per_file_coverage.keys())
 
     # -- Print header
     # size of separator is determined by 3 column sizes:
     # file name, coverage percentage and lines.
-    header_template = \
-        "%" + str(max_file_name_length) + "s\t%s\t%s"
+    header_template = "%" + str(max_file_name_length) + "s\t%s\t%s"
     separator = "-" * (max_file_name_length + 10 + 20)
-    print(header_template % ("Filename", "Coverage", "Lines"))  # noqa: E999 T25377293 Grandfathered in
+    print(
+        header_template % ("Filename", "Coverage", "Lines")
+    )  # noqa: E999 T25377293 Grandfathered in
     print(separator)
 
     # -- Print body
@@ -91,13 +95,14 @@ def display_file_coverage(per_file_coverage, total_coverage):
         print(separator)
         print(record_template % ("Total", total_coverage[0], total_coverage[1]))
 
+
 def report_coverage():
     parser = get_option_parser()
     (options, args) = parser.parse_args()
 
     interested_files = set()
     if options.filenames is not None:
-        interested_files = set(f.strip() for f in options.filenames.split(','))
+        interested_files = {f.strip() for f in options.filenames.split(",")}
 
     # To make things simple, right now we only read gcov report from the input
     per_file_coverage, total_coverage = parse_gcov_report(sys.stdin)
@@ -105,7 +110,8 @@ def report_coverage():
     # Check if we need to display coverage info for interested files.
     if len(interested_files):
         per_file_coverage = dict(
-            (fname, per_file_coverage[fname]) for fname in interested_files
+            (fname, per_file_coverage[fname])
+            for fname in interested_files
             if fname in per_file_coverage
         )
         # If we only interested in several files, it makes no sense to report
@@ -117,5 +123,6 @@ def report_coverage():
         return
     display_file_coverage(per_file_coverage, total_coverage)
 
+
 if __name__ == "__main__":
     report_coverage()

tools/advisor/advisor/bench_runner.py

@@ -3,8 +3,8 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
-from abc import ABC, abstractmethod
 import re
+from abc import ABC, abstractmethod
 
 
 class BenchmarkRunner(ABC):
@@ -25,15 +25,15 @@ class BenchmarkRunner(ABC):
         # 'dev_shm_LOG' and its location will be /tmp/rocks. If db_log_dir is
         # not specified in the OPTIONS file, then the location of the log file
         # will be /dev/shm and the name of the file will be 'LOG'
-        file_name = ''
+        file_name = ""
         if log_dir:
             # refer GetInfoLogPrefix() in rocksdb/util/filename.cc
             # example db_path: /dev/shm/dbbench
             file_name = db_path[1:]  # to ignore the leading '/' character
-            to_be_replaced = re.compile('[^0-9a-zA-Z\-_\.]')
+            to_be_replaced = re.compile("[^0-9a-zA-Z\-_\.]") # noqa
             for character in to_be_replaced.findall(db_path):
-                file_name = file_name.replace(character, '_')
-            if not file_name.endswith('_'):
-                file_name += '_'
-        file_name += 'LOG'
+                file_name = file_name.replace(character, "_")
+            if not file_name.endswith("_"):
+                file_name += "_"
+        file_name += "LOG"
         return file_name

tools/advisor/advisor/config_optimizer_example.py

@@ -4,6 +4,7 @@
 #  (found in the LICENSE.Apache file in the root directory).
 
 import argparse
+
 from advisor.db_config_optimizer import ConfigOptimizer
 from advisor.db_log_parser import NO_COL_FAMILY
 from advisor.db_options_parser import DatabaseOptions
@@ -23,44 +24,35 @@ def main(args):
     bench_runner_class = getattr(bench_runner_module, args.benchrunner_class)
     ods_args = {}
     if args.ods_client and args.ods_entity:
-        ods_args['client_script'] = args.ods_client
-        ods_args['entity'] = args.ods_entity
+        ods_args["client_script"] = args.ods_client
+        ods_args["entity"] = args.ods_entity
         if args.ods_key_prefix:
-            ods_args['key_prefix'] = args.ods_key_prefix
+            ods_args["key_prefix"] = args.ods_key_prefix
     db_bench_runner = bench_runner_class(args.benchrunner_pos_args, ods_args)
     # initialise the database configuration
     db_options = DatabaseOptions(args.rocksdb_options, args.misc_options)
     # set the frequency at which stats are dumped in the LOG file and the
     # location of the LOG file.
     db_log_dump_settings = {
-        "DBOptions.stats_dump_period_sec": {
-            NO_COL_FAMILY: args.stats_dump_period_sec
-        }
+        "DBOptions.stats_dump_period_sec": {NO_COL_FAMILY: args.stats_dump_period_sec}
     }
     db_options.update_options(db_log_dump_settings)
     # initialise the configuration optimizer
     config_optimizer = ConfigOptimizer(
-        db_bench_runner,
-        db_options,
-        rule_spec_parser,
-        args.base_db_path
+        db_bench_runner, db_options, rule_spec_parser, args.base_db_path
     )
     # run the optimiser to improve the database configuration for given
     # benchmarks, with the help of expert-specified rules
     final_db_options = config_optimizer.run()
     # generate the final rocksdb options file
     print(
-        'Final configuration in: ' +
-        final_db_options.generate_options_config('final')
-    )
-    print(
-        'Final miscellaneous options: ' +
-        repr(final_db_options.get_misc_options())
+        "Final configuration in: " + final_db_options.generate_options_config("final")
     )
+    print("Final miscellaneous options: " + repr(final_db_options.get_misc_options()))
 
 
-if __name__ == '__main__':
-    '''
+if __name__ == "__main__":
+    """
     An example run of this tool from the command-line would look like:
     python3 -m advisor.config_optimizer_example
     --base_db_path=/tmp/rocksdbtest-155919/dbbench
@@ -69,66 +61,80 @@ if __name__ == '__main__':
     --benchrunner_module=advisor.db_bench_runner
     --benchrunner_class=DBBenchRunner --benchrunner_pos_args ./../../db_bench
     readwhilewriting use_existing_db=true duration=90
-    '''
-    parser = argparse.ArgumentParser(description='This script is used for\
-        searching for a better database configuration')
+    """
+    parser = argparse.ArgumentParser(
+        description="This script is used for\
+        searching for a better database configuration"
+    )
     parser.add_argument(
-        '--rocksdb_options', required=True, type=str,
-        help='path of the starting Rocksdb OPTIONS file'
+        "--rocksdb_options",
+        required=True,
+        type=str,
+        help="path of the starting Rocksdb OPTIONS file",
     )
     # these are options that are column-family agnostic and are not yet
     # supported by the Rocksdb Options file: eg. bloom_bits=2
     parser.add_argument(
-        '--misc_options', nargs='*',
-        help='whitespace-separated list of options that are not supported ' +
-        'by the Rocksdb OPTIONS file, given in the ' +
-        '<option_name>=<option_value> format eg. "bloom_bits=2 ' +
-        'rate_limiter_bytes_per_sec=128000000"')
-    parser.add_argument(
-        '--base_db_path', required=True, type=str,
-        help='path for the Rocksdb database'
+        "--misc_options",
+        nargs="*",
+        help="whitespace-separated list of options that are not supported "
+        + "by the Rocksdb OPTIONS file, given in the "
+        + '<option_name>=<option_value> format eg. "bloom_bits=2 '
+        + 'rate_limiter_bytes_per_sec=128000000"',
     )
     parser.add_argument(
-        '--rules_spec', required=True, type=str,
-        help='path of the file containing the expert-specified Rules'
+        "--base_db_path", required=True, type=str, help="path for the Rocksdb database"
     )
     parser.add_argument(
-        '--stats_dump_period_sec', required=True, type=int,
-        help='the frequency (in seconds) at which STATISTICS are printed to ' +
-        'the Rocksdb LOG file'
+        "--rules_spec",
+        required=True,
+        type=str,
+        help="path of the file containing the expert-specified Rules",
     )
-    # ODS arguments
     parser.add_argument(
-        '--ods_client', type=str, help='the ODS client binary'
+        "--stats_dump_period_sec",
+        required=True,
+        type=int,
+        help="the frequency (in seconds) at which STATISTICS are printed to "
+        + "the Rocksdb LOG file",
     )
+    # ODS arguments
+    parser.add_argument("--ods_client", type=str, help="the ODS client binary")
     parser.add_argument(
-        '--ods_entity', type=str,
-        help='the servers for which the ODS stats need to be fetched'
+        "--ods_entity",
+        type=str,
+        help="the servers for which the ODS stats need to be fetched",
     )
     parser.add_argument(
-        '--ods_key_prefix', type=str,
-        help='the prefix that needs to be attached to the keys of time ' +
-        'series to be fetched from ODS'
+        "--ods_key_prefix",
+        type=str,
+        help="the prefix that needs to be attached to the keys of time "
+        + "series to be fetched from ODS",
     )
     # benchrunner_module example: advisor.db_benchmark_client
     parser.add_argument(
-        '--benchrunner_module', required=True, type=str,
-        help='the module containing the BenchmarkRunner class to be used by ' +
-        'the Optimizer, example: advisor.db_bench_runner'
+        "--benchrunner_module",
+        required=True,
+        type=str,
+        help="the module containing the BenchmarkRunner class to be used by "
+        + "the Optimizer, example: advisor.db_bench_runner",
     )
     # benchrunner_class example: DBBenchRunner
     parser.add_argument(
-        '--benchrunner_class', required=True, type=str,
-        help='the name of the BenchmarkRunner class to be used by the ' +
-        'Optimizer, should be present in the module provided in the ' +
-        'benchrunner_module argument, example: DBBenchRunner'
+        "--benchrunner_class",
+        required=True,
+        type=str,
+        help="the name of the BenchmarkRunner class to be used by the "
+        + "Optimizer, should be present in the module provided in the "
+        + "benchrunner_module argument, example: DBBenchRunner",
     )
     parser.add_argument(
-        '--benchrunner_pos_args', nargs='*',
-        help='whitespace-separated positional arguments that are passed on ' +
-        'to the constructor of the BenchmarkRunner class provided in the ' +
-        'benchrunner_class argument, example: "use_existing_db=true ' +
-        'duration=900"'
+        "--benchrunner_pos_args",
+        nargs="*",
+        help="whitespace-separated positional arguments that are passed on "
+        + "to the constructor of the BenchmarkRunner class provided in the "
+        + 'benchrunner_class argument, example: "use_existing_db=true '
+        + 'duration=900"',
     )
     args = parser.parse_args()
     main(args)

tools/advisor/advisor/db_bench_runner.py

@@ -3,19 +3,22 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
-from advisor.bench_runner import BenchmarkRunner
-from advisor.db_log_parser import DataSource, DatabaseLogs, NO_COL_FAMILY
-from advisor.db_stats_fetcher import (
-    LogStatsParser, OdsStatsFetcher, DatabasePerfContext
-)
 import shutil
 import subprocess
 import time
 
+from advisor.bench_runner import BenchmarkRunner
+from advisor.db_log_parser import DatabaseLogs, DataSource, NO_COL_FAMILY
+from advisor.db_stats_fetcher import (
+    DatabasePerfContext,
+    LogStatsParser,
+    OdsStatsFetcher,
+)
+
 
-'''
+"""
 NOTE: This is not thread-safe, because the output file is simply overwritten.
-'''
+"""
 
 
 class DBBenchRunner(BenchmarkRunner):
@@ -37,9 +40,7 @@ class DBBenchRunner(BenchmarkRunner):
         optional_args_str = ""
         for option_name, option_value in misc_options_dict.items():
             if option_value:
-                optional_args_str += (
-                    " --" + option_name + "=" + str(option_value)
-                )
+                optional_args_str += " --" + option_name + "=" + str(option_value)
         return optional_args_str
 
     def __init__(self, positional_args, ods_args=None):
@@ -54,19 +55,17 @@ class DBBenchRunner(BenchmarkRunner):
         self.ods_args = ods_args
 
     def _parse_output(self, get_perf_context=False):
-        '''
+        """
         Sample db_bench output after running 'readwhilewriting' benchmark:
         DB path: [/tmp/rocksdbtest-155919/dbbench]\n
         readwhilewriting : 16.582 micros/op 60305 ops/sec; 4.2 MB/s (3433828\
         of 5427999 found)\n
         PERF_CONTEXT:\n
         user_key_comparison_count = 500466712, block_cache_hit_count = ...\n
-        '''
-        output = {
-            self.THROUGHPUT: None, self.DB_PATH: None, self.PERF_CON: None
-        }
+        """
+        output = {self.THROUGHPUT: None, self.DB_PATH: None, self.PERF_CON: None}
         perf_context_begins = False
-        with open(self.OUTPUT_FILE, 'r') as fp:
+        with open(self.OUTPUT_FILE, "r") as fp:
             for line in fp:
                 if line.startswith(self.benchmark):
                     # line from sample output:
@@ -77,9 +76,7 @@ class DBBenchRunner(BenchmarkRunner):
                     for ix, token in enumerate(token_list):
                         if token.startswith(self.THROUGHPUT):
                             # in above example, throughput = 60305 ops/sec
-                            output[self.THROUGHPUT] = (
-                                float(token_list[ix - 1])
-                            )
+                            output[self.THROUGHPUT] = float(token_list[ix - 1])
                             break
                 elif get_perf_context and line.startswith(self.PERF_CON):
                     # the following lines in the output contain perf context
@@ -89,11 +86,11 @@ class DBBenchRunner(BenchmarkRunner):
                     # Sample perf_context output:
                     # user_key_comparison_count = 500, block_cache_hit_count =\
                     # 468, block_read_count = 580, block_read_byte = 445, ...
-                    token_list = line.strip().split(',')
+                    token_list = line.strip().split(",")
                     # token_list = ['user_key_comparison_count = 500',
                     # 'block_cache_hit_count = 468','block_read_count = 580'...
                     perf_context = {
-                        tk.split('=')[0].strip(): tk.split('=')[1].strip()
+                        tk.split("=")[0].strip(): tk.split("=")[1].strip()
                         for tk in token_list
                         if tk
                     }
@@ -103,17 +100,13 @@ class DBBenchRunner(BenchmarkRunner):
                     timestamp = int(time.time())
                     perf_context_ts = {}
                     for stat in perf_context.keys():
-                        perf_context_ts[stat] = {
-                            timestamp: int(perf_context[stat])
-                        }
+                        perf_context_ts[stat] = {timestamp: int(perf_context[stat])}
                     output[self.PERF_CON] = perf_context_ts
                     perf_context_begins = False
                 elif line.startswith(self.DB_PATH):
                     # line from sample output:
                     # DB path: [/tmp/rocksdbtest-155919/dbbench]\n
-                    output[self.DB_PATH] = (
-                        line.split('[')[1].split(']')[0]
-                    )
+                    output[self.DB_PATH] = line.split("[")[1].split("]")[0]
         return output
 
     def get_log_options(self, db_options, db_path):
@@ -124,40 +117,38 @@ class DBBenchRunner(BenchmarkRunner):
         logs_file_prefix = None
 
         # fetch frequency at which the stats are dumped in the Rocksdb logs
-        dump_period = 'DBOptions.stats_dump_period_sec'
+        dump_period = "DBOptions.stats_dump_period_sec"
         # fetch the directory, if specified, in which the Rocksdb logs are
         # dumped, by default logs are dumped in same location as database
-        log_dir = 'DBOptions.db_log_dir'
+        log_dir = "DBOptions.db_log_dir"
         log_options = db_options.get_options([dump_period, log_dir])
         if dump_period in log_options:
             stats_freq_sec = int(log_options[dump_period][NO_COL_FAMILY])
         if log_dir in log_options:
             log_dir_path = log_options[log_dir][NO_COL_FAMILY]
 
-        log_file_name = DBBenchRunner.get_info_log_file_name(
-            log_dir_path, db_path
-        )
+        log_file_name = DBBenchRunner.get_info_log_file_name(log_dir_path, db_path)
 
         if not log_dir_path:
             log_dir_path = db_path
-        if not log_dir_path.endswith('/'):
-            log_dir_path += '/'
+        if not log_dir_path.endswith("/"):
+            log_dir_path += "/"
 
         logs_file_prefix = log_dir_path + log_file_name
         return (logs_file_prefix, stats_freq_sec)
 
     def _get_options_command_line_args_str(self, curr_options):
-        '''
+        """
         This method uses the provided Rocksdb OPTIONS to create a string of
         command-line arguments for db_bench.
         The --options_file argument is always given and the options that are
         not supported by the OPTIONS file are given as separate arguments.
-        '''
+        """
         optional_args_str = DBBenchRunner.get_opt_args_str(
             curr_options.get_misc_options()
         )
         # generate an options configuration file
-        options_file = curr_options.generate_options_config(nonce='12345')
+        options_file = curr_options.generate_options_config(nonce="12345")
         optional_args_str += " --options_file=" + options_file
         return optional_args_str
 
@@ -166,10 +157,11 @@ class DBBenchRunner(BenchmarkRunner):
         try:
             shutil.rmtree(db_path, ignore_errors=True)
         except OSError as e:
-            print('Error: rmdir ' + e.filename + ' ' + e.strerror)
+            print("Error: rmdir " + e.filename + " " + e.strerror)
         # setup database with a million keys using the fillrandom benchmark
         command = "%s --benchmarks=fillrandom --db=%s --num=1000000" % (
-            self.db_bench_binary, db_path
+            self.db_bench_binary,
+            db_path,
         )
         args_str = self._get_options_command_line_args_str(curr_options)
         command += args_str
@@ -177,21 +169,23 @@ class DBBenchRunner(BenchmarkRunner):
 
     def _build_experiment_command(self, curr_options, db_path):
         command = "%s --benchmarks=%s --statistics --perf_level=3 --db=%s" % (
-            self.db_bench_binary, self.benchmark, db_path
+            self.db_bench_binary,
+            self.benchmark,
+            db_path,
         )
         # fetch the command-line arguments string for providing Rocksdb options
         args_str = self._get_options_command_line_args_str(curr_options)
         # handle the command-line args passed in the constructor, these
         # arguments are specific to db_bench
         for cmd_line_arg in self.db_bench_args:
-            args_str += (" --" + cmd_line_arg)
+            args_str += " --" + cmd_line_arg
         command += args_str
         return command
 
     def _run_command(self, command):
         out_file = open(self.OUTPUT_FILE, "w+")
         err_file = open(self.ERROR_FILE, "w+")
-        print('executing... - ' + command)
+        print("executing... - " + command)
         subprocess.call(command, shell=True, stdout=out_file, stderr=err_file)
         out_file.close()
         err_file.close()
@@ -214,32 +208,30 @@ class DBBenchRunner(BenchmarkRunner):
             db_options, parsed_output[self.DB_PATH]
         )
         # create the Rocksbd LOGS object
-        db_logs = DatabaseLogs(
-            logs_file_prefix, db_options.get_column_families()
-        )
+        db_logs = DatabaseLogs(logs_file_prefix, db_options.get_column_families())
         # Create the Log STATS object
         db_log_stats = LogStatsParser(logs_file_prefix, stats_freq_sec)
         # Create the PerfContext STATS object
-        db_perf_context = DatabasePerfContext(
-            parsed_output[self.PERF_CON], 0, False
-        )
+        db_perf_context = DatabasePerfContext(parsed_output[self.PERF_CON], 0, False)
         # create the data-sources dictionary
         data_sources = {
             DataSource.Type.DB_OPTIONS: [db_options],
             DataSource.Type.LOG: [db_logs],
-            DataSource.Type.TIME_SERIES: [db_log_stats, db_perf_context]
+            DataSource.Type.TIME_SERIES: [db_log_stats, db_perf_context],
         }
         # Create the ODS STATS object
         if self.ods_args:
-            key_prefix = ''
-            if 'key_prefix' in self.ods_args:
-                key_prefix = self.ods_args['key_prefix']
-            data_sources[DataSource.Type.TIME_SERIES].append(OdsStatsFetcher(
-                self.ods_args['client_script'],
-                self.ods_args['entity'],
-                experiment_start_time,
-                experiment_end_time,
-                key_prefix
-            ))
+            key_prefix = ""
+            if "key_prefix" in self.ods_args:
+                key_prefix = self.ods_args["key_prefix"]
+            data_sources[DataSource.Type.TIME_SERIES].append(
+                OdsStatsFetcher(
+                    self.ods_args["client_script"],
+                    self.ods_args["entity"],
+                    experiment_start_time,
+                    experiment_end_time,
+                    key_prefix,
+                )
+            )
         # return the experiment's data-sources and throughput
         return data_sources, parsed_output[self.THROUGHPUT]

tools/advisor/advisor/db_config_optimizer.py

@@ -3,16 +3,17 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
+import copy
+import random
+
 from advisor.db_log_parser import NO_COL_FAMILY
 from advisor.db_options_parser import DatabaseOptions
 from advisor.rule_parser import Suggestion
-import copy
-import random
 
 
 class ConfigOptimizer:
-    SCOPE = 'scope'
-    SUGG_VAL = 'suggested values'
+    SCOPE = "scope"
+    SUGG_VAL = "suggested values"
 
     @staticmethod
     def apply_action_on_value(old_value, action, suggested_values):
@@ -21,7 +22,7 @@ class ConfigOptimizer:
             chosen_sugg_val = random.choice(list(suggested_values))
         new_value = None
         if action is Suggestion.Action.set or not old_value:
-            assert(chosen_sugg_val)
+            assert chosen_sugg_val
             new_value = chosen_sugg_val
         else:
             # For increase/decrease actions, currently the code tries to make
@@ -61,8 +62,8 @@ class ConfigOptimizer:
             # A Suggestion in the rules spec must have the 'option' and
             # 'action' fields defined, always call perform_checks() method
             # after parsing the rules file using RulesSpec
-            assert(option)
-            assert(action)
+            assert option
+            assert action
             required_options.append(option)
             rule_suggestions.append(suggestions_dict[sugg_name])
         current_config = options.get_options(required_options)
@@ -87,8 +88,9 @@ class ConfigOptimizer:
                             updated_config[sugg.option][col_fam] = new_value
                 except AssertionError:
                     print(
-                        'WARNING(ConfigOptimizer): provide suggested_values ' +
-                        'for ' + sugg.option
+                        "WARNING(ConfigOptimizer): provide suggested_values "
+                        + "for "
+                        + sugg.option
                     )
                 continue
             # case: when the option is present in the current configuration
@@ -103,8 +105,9 @@ class ConfigOptimizer:
                     updated_config[sugg.option][NO_COL_FAMILY] = new_value
                 except AssertionError:
                     print(
-                        'WARNING(ConfigOptimizer): provide suggested_values ' +
-                        'for ' + sugg.option
+                        "WARNING(ConfigOptimizer): provide suggested_values "
+                        + "for "
+                        + sugg.option
                     )
             else:
                 for col_fam in rule.get_trigger_column_families():
@@ -120,15 +123,16 @@ class ConfigOptimizer:
                         updated_config[sugg.option][col_fam] = new_value
                     except AssertionError:
                         print(
-                            'WARNING(ConfigOptimizer): provide ' +
-                            'suggested_values for ' + sugg.option
+                            "WARNING(ConfigOptimizer): provide "
+                            + "suggested_values for "
+                            + sugg.option
                         )
         return current_config, updated_config
 
     @staticmethod
     def pick_rule_to_apply(rules, last_rule_name, rules_tried, backtrack):
         if not rules:
-            print('\nNo more rules triggered!')
+            print("\nNo more rules triggered!")
             return None
         # if the last rule provided an improvement in the database performance,
         # and it was triggered again (i.e. it is present in 'rules'), then pick
@@ -143,7 +147,7 @@ class ConfigOptimizer:
         for rule in rules:
             if rule.name not in rules_tried:
                 return rule
-        print('\nAll rules have been exhausted')
+        print("\nAll rules have been exhausted")
         return None
 
     @staticmethod
@@ -153,13 +157,13 @@ class ConfigOptimizer:
         rules_tried,
         backtrack,
         curr_options,
-        suggestions_dict
+        suggestions_dict,
     ):
         curr_rule = ConfigOptimizer.pick_rule_to_apply(
             triggered_rules, current_rule_name, rules_tried, backtrack
         )
         if not curr_rule:
-            return tuple([None]*4)
+            return tuple([None] * 4)
         # if a rule has been picked for improving db_config, update rules_tried
         rules_tried.add(curr_rule.name)
         # get updated config based on the picked rule
@@ -168,17 +172,20 @@ class ConfigOptimizer:
         )
         conf_diff = DatabaseOptions.get_options_diff(curr_conf, updated_conf)
         if not conf_diff:  # the current and updated configs are the same
-            curr_rule, rules_tried, curr_conf, updated_conf = (
-                ConfigOptimizer.apply_suggestions(
-                    triggered_rules,
-                    None,
-                    rules_tried,
-                    backtrack,
-                    curr_options,
-                    suggestions_dict
-                )
+            (
+                curr_rule,
+                rules_tried,
+                curr_conf,
+                updated_conf,
+            ) = ConfigOptimizer.apply_suggestions(
+                triggered_rules,
+                None,
+                rules_tried,
+                backtrack,
+                curr_options,
+                suggestions_dict,
             )
-        print('returning from apply_suggestions')
+        print("returning from apply_suggestions")
         return (curr_rule, rules_tried, curr_conf, updated_conf)
 
     # TODO(poojam23): check if this method is required or can we directly set
@@ -205,52 +212,53 @@ class ConfigOptimizer:
         # RULE from all the triggered rules and apply all its suggestions to
         # the appropriate options.
         # bootstrapping the optimizer
-        print('Bootstrapping optimizer:')
+        print("Bootstrapping optimizer:")
         options = copy.deepcopy(self.db_options)
-        old_data_sources, old_metric = (
-            self.bench_runner.run_experiment(options, self.base_db_path)
+        old_data_sources, old_metric = self.bench_runner.run_experiment(
+            options, self.base_db_path
         )
-        print('Initial metric: ' + str(old_metric))
+        print("Initial metric: " + str(old_metric))
         self.rule_parser.load_rules_from_spec()
         self.rule_parser.perform_section_checks()
         triggered_rules = self.rule_parser.get_triggered_rules(
             old_data_sources, options.get_column_families()
         )
-        print('\nTriggered:')
+        print("\nTriggered:")
         self.rule_parser.print_rules(triggered_rules)
         backtrack = False
         rules_tried = set()
-        curr_rule, rules_tried, curr_conf, updated_conf = (
-            ConfigOptimizer.apply_suggestions(
-                triggered_rules,
-                None,
-                rules_tried,
-                backtrack,
-                options,
-                self.rule_parser.get_suggestions_dict()
-            )
+        (
+            curr_rule,
+            rules_tried,
+            curr_conf,
+            updated_conf,
+        ) = ConfigOptimizer.apply_suggestions(
+            triggered_rules,
+            None,
+            rules_tried,
+            backtrack,
+            options,
+            self.rule_parser.get_suggestions_dict(),
         )
         # the optimizer loop
         while curr_rule:
-            print('\nRule picked for next iteration:')
+            print("\nRule picked for next iteration:")
             print(curr_rule.name)
-            print('\ncurrent config:')
+            print("\ncurrent config:")
             print(curr_conf)
-            print('updated config:')
+            print("updated config:")
             print(updated_conf)
             options.update_options(updated_conf)
             # run bench_runner with updated config
-            new_data_sources, new_metric = (
-                self.bench_runner.run_experiment(options, self.base_db_path)
-            )
-            print('\nnew metric: ' + str(new_metric))
-            backtrack = not self.bench_runner.is_metric_better(
-                new_metric, old_metric
+            new_data_sources, new_metric = self.bench_runner.run_experiment(
+                options, self.base_db_path
             )
+            print("\nnew metric: " + str(new_metric))
+            backtrack = not self.bench_runner.is_metric_better(new_metric, old_metric)
             # update triggered_rules, metric, data_sources, if required
             if backtrack:
                 # revert changes to options config
-                print('\nBacktracking to previous configuration')
+                print("\nBacktracking to previous configuration")
                 backtrack_conf = ConfigOptimizer.get_backtrack_config(
                     curr_conf, updated_conf
                 )
@@ -262,21 +270,24 @@ class ConfigOptimizer:
                 triggered_rules = self.rule_parser.get_triggered_rules(
                     new_data_sources, options.get_column_families()
                 )
-                print('\nTriggered:')
+                print("\nTriggered:")
                 self.rule_parser.print_rules(triggered_rules)
                 old_metric = new_metric
                 old_data_sources = new_data_sources
                 rules_tried = set()
             # pick rule to work on and set curr_rule to that
-            curr_rule, rules_tried, curr_conf, updated_conf = (
-                ConfigOptimizer.apply_suggestions(
-                    triggered_rules,
-                    curr_rule.name,
-                    rules_tried,
-                    backtrack,
-                    options,
-                    self.rule_parser.get_suggestions_dict()
-                )
+            (
+                curr_rule,
+                rules_tried,
+                curr_conf,
+                updated_conf,
+            ) = ConfigOptimizer.apply_suggestions(
+                triggered_rules,
+                curr_rule.name,
+                rules_tried,
+                backtrack,
+                options,
+                self.rule_parser.get_suggestions_dict(),
             )
         # return the final database options configuration
         return options

tools/advisor/advisor/db_log_parser.py

@@ -3,15 +3,15 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
-from abc import ABC, abstractmethod
-from calendar import timegm
-from enum import Enum
 import glob
 import re
 import time
+from abc import ABC, abstractmethod
+from calendar import timegm
+from enum import Enum
 
 
-NO_COL_FAMILY = 'DB_WIDE'
+NO_COL_FAMILY = "DB_WIDE"
 
 
 class DataSource(ABC):
@@ -33,7 +33,7 @@ class Log:
     def is_new_log(log_line):
         # The assumption is that a new log will start with a date printed in
         # the below regex format.
-        date_regex = '\d{4}/\d{2}/\d{2}-\d{2}:\d{2}:\d{2}\.\d{6}'
+        date_regex = "\d{4}/\d{2}/\d{2}-\d{2}:\d{2}:\d{2}\.\d{6}" # noqa
         return re.match(date_regex, log_line)
 
     def __init__(self, log_line, column_families):
@@ -46,7 +46,7 @@ class Log:
         # "2018/07/25-17:29:05.176080 7f969de68700 [db/compaction_job.cc:1634]
         # [default] [JOB 3] Compacting 24@0 + 16@1 files to L1, score 6.00\n"
         for col_fam in column_families:
-            search_for_str = '\[' + col_fam + '\]'
+            search_for_str = "\[" + col_fam + "\]" # noqa
             if re.search(search_for_str, self.message):
                 self.column_family = col_fam
                 break
@@ -67,21 +67,26 @@ class Log:
         return self.message
 
     def append_message(self, remaining_log):
-        self.message = self.message + '\n' + remaining_log.strip()
+        self.message = self.message + "\n" + remaining_log.strip()
 
     def get_timestamp(self):
         # example: '2018/07/25-11:25:45.782710' will be converted to the GMT
         # Unix timestamp 1532517945 (note: this method assumes that self.time
         # is in GMT)
-        hr_time = self.time + 'GMT'
+        hr_time = self.time + "GMT"
         timestamp = timegm(time.strptime(hr_time, "%Y/%m/%d-%H:%M:%S.%f%Z"))
         return timestamp
 
     def __repr__(self):
         return (
-            'time: ' + self.time + '; context: ' + self.context +
-            '; col_fam: ' + self.column_family +
-            '; message: ' + self.message
+            "time: "
+            + self.time
+            + "; context: "
+            + self.context
+            + "; col_fam: "
+            + self.column_family
+            + "; message: "
+            + self.message
         )
 
 
@@ -106,22 +111,20 @@ class DatabaseLogs(DataSource):
                 cond.set_trigger(trigger)
 
     def check_and_trigger_conditions(self, conditions):
-        for file_name in glob.glob(self.logs_path_prefix + '*'):
+        for file_name in glob.glob(self.logs_path_prefix + "*"):
             # TODO(poojam23): find a way to distinguish between log files
             # - generated in the current experiment but are labeled 'old'
             # because they LOGs exceeded the file size limit  AND
             # - generated in some previous experiment that are also labeled
             # 'old' and were not deleted for some reason
-            if re.search('old', file_name, re.IGNORECASE):
+            if re.search("old", file_name, re.IGNORECASE):
                 continue
-            with open(file_name, 'r') as db_logs:
+            with open(file_name, "r") as db_logs:
                 new_log = None
                 for line in db_logs:
                     if Log.is_new_log(line):
                         if new_log:
-                            self.trigger_conditions_for_log(
-                                conditions, new_log
-                            )
+                            self.trigger_conditions_for_log(conditions, new_log)
                         new_log = Log(line, self.column_families)
                     else:
                         # To account for logs split into multiple lines

tools/advisor/advisor/db_options_parser.py

@@ -4,25 +4,26 @@
 #  (found in the LICENSE.Apache file in the root directory).
 
 import copy
+import os
+
 from advisor.db_log_parser import DataSource, NO_COL_FAMILY
 from advisor.ini_parser import IniParser
-import os
 
 
 class OptionsSpecParser(IniParser):
     @staticmethod
     def is_new_option(line):
-        return '=' in line
+        return "=" in line
 
     @staticmethod
     def get_section_type(line):
-        '''
+        """
         Example section header: [TableOptions/BlockBasedTable "default"]
         Here ConfigurationOptimizer returned would be
         'TableOptions.BlockBasedTable'
-        '''
+        """
         section_path = line.strip()[1:-1].split()[0]
-        section_type = '.'.join(section_path.split('/'))
+        section_type = ".".join(section_path.split("/"))
         return section_type
 
     @staticmethod
@@ -39,20 +40,20 @@ class OptionsSpecParser(IniParser):
         # Example:
         # Case 1: get_section_str('DBOptions', NO_COL_FAMILY)
         # Case 2: get_section_str('TableOptions.BlockBasedTable', 'default')
-        section_type = '/'.join(section_type.strip().split('.'))
+        section_type = "/".join(section_type.strip().split("."))
         # Case 1: section_type = 'DBOptions'
         # Case 2: section_type = 'TableOptions/BlockBasedTable'
-        section_str = '[' + section_type
+        section_str = "[" + section_type
         if section_name == NO_COL_FAMILY:
             # Case 1: '[DBOptions]'
-            return (section_str + ']')
+            return section_str + "]"
         else:
             # Case 2: '[TableOptions/BlockBasedTable "default"]'
             return section_str + ' "' + section_name + '"]'
 
     @staticmethod
     def get_option_str(key, values):
-        option_str = key + '='
+        option_str = key + "="
         # get_option_str('db_log_dir', None), returns 'db_log_dir='
         if values:
             # example:
@@ -61,7 +62,7 @@ class OptionsSpecParser(IniParser):
             # 'max_bytes_for_level_multiplier_additional=1:1:1:1:1:1:1'
             if isinstance(values, list):
                 for value in values:
-                    option_str += (str(value) + ':')
+                    option_str += str(value) + ":"
                 option_str = option_str[:-1]
             else:
                 # example: get_option_str('write_buffer_size', 1048576)
@@ -71,13 +72,12 @@ class OptionsSpecParser(IniParser):
 
 
 class DatabaseOptions(DataSource):
-
     @staticmethod
     def is_misc_option(option_name):
         # these are miscellaneous options that are not yet supported by the
         # Rocksdb options file, hence they are not prefixed with any section
         # name
-        return '.' not in option_name
+        return "." not in option_name
 
     @staticmethod
     def get_options_diff(opt_old, opt_new):
@@ -102,7 +102,7 @@ class DatabaseOptions(DataSource):
                         if opt_old[opt][col_fam] != opt_new[opt][col_fam]:
                             diff[opt][col_fam] = (
                                 opt_old[opt][col_fam],
-                                opt_new[opt][col_fam]
+                                opt_new[opt][col_fam],
                             )
                     else:
                         diff[opt][col_fam] = (opt_old[opt][col_fam], None)
@@ -111,7 +111,7 @@ class DatabaseOptions(DataSource):
                         if opt_old[opt][col_fam] != opt_new[opt][col_fam]:
                             diff[opt][col_fam] = (
                                 opt_old[opt][col_fam],
-                                opt_new[opt][col_fam]
+                                opt_new[opt][col_fam],
                             )
                     else:
                         diff[opt][col_fam] = (None, opt_new[opt][col_fam])
@@ -137,21 +137,19 @@ class DatabaseOptions(DataSource):
         self.misc_options = {}
         if misc_options:
             for option_pair_str in misc_options:
-                option_name = option_pair_str.split('=')[0].strip()
-                option_value = option_pair_str.split('=')[1].strip()
+                option_name = option_pair_str.split("=")[0].strip()
+                option_value = option_pair_str.split("=")[1].strip()
                 self.misc_options[option_name] = option_value
 
     def load_from_source(self, options_path):
         self.options_dict = {}
-        with open(options_path, 'r') as db_options:
+        with open(options_path, "r") as db_options:
             for line in db_options:
                 line = OptionsSpecParser.remove_trailing_comment(line)
                 if not line:
                     continue
                 if OptionsSpecParser.is_section_header(line):
-                    curr_sec_type = (
-                        OptionsSpecParser.get_section_type(line)
-                    )
+                    curr_sec_type = OptionsSpecParser.get_section_type(line)
                     curr_sec_name = OptionsSpecParser.get_section_name(line)
                     if curr_sec_type not in self.options_dict:
                         self.options_dict[curr_sec_type] = {}
@@ -163,17 +161,15 @@ class DatabaseOptions(DataSource):
                     # CFOptions and 'default' is the name of a column family
                     # that for this database, so it's added to the list of
                     # column families stored in this object
-                    if curr_sec_type == 'CFOptions':
+                    if curr_sec_type == "CFOptions":
                         if not self.column_families:
                             self.column_families = []
                         self.column_families.append(curr_sec_name)
                 elif OptionsSpecParser.is_new_option(line):
                     key, value = OptionsSpecParser.get_key_value_pair(line)
-                    self.options_dict[curr_sec_type][curr_sec_name][key] = (
-                        value
-                    )
+                    self.options_dict[curr_sec_type][curr_sec_name][key] = value
                 else:
-                    error = 'Not able to parse line in Options file.'
+                    error = "Not able to parse line in Options file."
                     OptionsSpecParser.exit_with_parse_error(line, error)
 
     def get_misc_options(self):
@@ -193,7 +189,7 @@ class DatabaseOptions(DataSource):
         for sec_type in self.options_dict:
             for col_fam in self.options_dict[sec_type]:
                 for opt_name in self.options_dict[sec_type][col_fam]:
-                    option = sec_type + '.' + opt_name
+                    option = sec_type + "." + opt_name
                     all_options.append(option)
         all_options.extend(list(self.misc_options.keys()))
         return self.get_options(all_options)
@@ -211,24 +207,22 @@ class DatabaseOptions(DataSource):
                     continue
                 if option not in reqd_options_dict:
                     reqd_options_dict[option] = {}
-                reqd_options_dict[option][NO_COL_FAMILY] = (
-                    self.misc_options[option]
-                )
+                reqd_options_dict[option][NO_COL_FAMILY] = self.misc_options[option]
             else:
                 # Example: option = 'TableOptions.BlockBasedTable.block_align'
                 # then, sec_type = 'TableOptions.BlockBasedTable'
-                sec_type = '.'.join(option.split('.')[:-1])
+                sec_type = ".".join(option.split(".")[:-1])
                 # opt_name = 'block_align'
-                opt_name = option.split('.')[-1]
+                opt_name = option.split(".")[-1]
                 if sec_type not in self.options_dict:
                     continue
                 for col_fam in self.options_dict[sec_type]:
                     if opt_name in self.options_dict[sec_type][col_fam]:
                         if option not in reqd_options_dict:
                             reqd_options_dict[option] = {}
-                        reqd_options_dict[option][col_fam] = (
-                            self.options_dict[sec_type][col_fam][opt_name]
-                        )
+                        reqd_options_dict[option][col_fam] = self.options_dict[
+                            sec_type
+                        ][col_fam][opt_name]
         return reqd_options_dict
 
     def update_options(self, options):
@@ -244,16 +238,19 @@ class DatabaseOptions(DataSource):
                 # misc_options dictionary
                 if NO_COL_FAMILY not in options[option]:
                     print(
-                        'WARNING(DatabaseOptions.update_options): not ' +
-                        'updating option ' + option + ' because it is in ' +
-                        'misc_option format but its scope is not ' +
-                        NO_COL_FAMILY + '. Check format of option.'
+                        "WARNING(DatabaseOptions.update_options): not "
+                        + "updating option "
+                        + option
+                        + " because it is in "
+                        + "misc_option format but its scope is not "
+                        + NO_COL_FAMILY
+                        + ". Check format of option."
                     )
                     continue
                 self.misc_options[option] = options[option][NO_COL_FAMILY]
             else:
-                sec_name = '.'.join(option.split('.')[:-1])
-                opt_name = option.split('.')[-1]
+                sec_name = ".".join(option.split(".")[:-1])
+                opt_name = option.split(".")[-1]
                 if sec_name not in self.options_dict:
                     self.options_dict[sec_name] = {}
                 for col_fam in options[option]:
@@ -262,30 +259,26 @@ class DatabaseOptions(DataSource):
                     # value
                     if col_fam not in self.options_dict[sec_name]:
                         self.options_dict[sec_name][col_fam] = {}
-                    self.options_dict[sec_name][col_fam][opt_name] = (
-                        copy.deepcopy(options[option][col_fam])
+                    self.options_dict[sec_name][col_fam][opt_name] = copy.deepcopy(
+                        options[option][col_fam]
                     )
 
     def generate_options_config(self, nonce):
         # this method generates a Rocksdb OPTIONS file in the INI format from
         # the options stored in self.options_dict
         this_path = os.path.abspath(os.path.dirname(__file__))
-        file_name = '../temp/OPTIONS_' + str(nonce) + '.tmp'
+        file_name = "../temp/OPTIONS_" + str(nonce) + ".tmp"
         file_path = os.path.join(this_path, file_name)
-        with open(file_path, 'w') as fp:
+        with open(file_path, "w") as fp:
             for section in self.options_dict:
                 for col_fam in self.options_dict[section]:
-                    fp.write(
-                        OptionsSpecParser.get_section_str(section, col_fam) +
-                        '\n'
-                    )
+                    fp.write(OptionsSpecParser.get_section_str(section, col_fam) + "\n")
                     for option in self.options_dict[section][col_fam]:
                         values = self.options_dict[section][col_fam][option]
                         fp.write(
-                            OptionsSpecParser.get_option_str(option, values) +
-                            '\n'
+                            OptionsSpecParser.get_option_str(option, values) + "\n"
                         )
-                fp.write('\n')
+                fp.write("\n")
         return file_path
 
     def check_and_trigger_conditions(self, conditions):
@@ -299,10 +292,14 @@ class DatabaseOptions(DataSource):
             for ix, option in enumerate(cond.options):
                 if option not in reqd_options_dict:
                     print(
-                        'WARNING(DatabaseOptions.check_and_trigger): ' +
-                        'skipping condition ' + cond.name + ' because it '
-                        'requires option ' + option + ' but this option is' +
-                        ' not available'
+                        "WARNING(DatabaseOptions.check_and_trigger): "
+                        + "skipping condition "
+                        + cond.name
+                        + " because it "
+                        "requires option "
+                        + option
+                        + " but this option is"
+                        + " not available"
                     )
                     missing_reqd_option = True
                     break  # required option is absent
@@ -321,9 +318,7 @@ class DatabaseOptions(DataSource):
                     if eval(cond.eval_expr):
                         cond.set_trigger({NO_COL_FAMILY: options})
                 except Exception as e:
-                    print(
-                        'WARNING(DatabaseOptions) check_and_trigger:' + str(e)
-                    )
+                    print("WARNING(DatabaseOptions) check_and_trigger:" + str(e))
                 continue
 
             # for all the options that are not database-wide, we look for their
@@ -340,14 +335,9 @@ class DatabaseOptions(DataSource):
                 if present:
                     try:
                         if eval(cond.eval_expr):
-                            col_fam_options_dict[col_fam] = (
-                                copy.deepcopy(options)
-                            )
+                            col_fam_options_dict[col_fam] = copy.deepcopy(options)
                     except Exception as e:
-                        print(
-                            'WARNING(DatabaseOptions) check_and_trigger: ' +
-                            str(e)
-                        )
+                        print("WARNING(DatabaseOptions) check_and_trigger: " + str(e))
             # Trigger for an OptionCondition object is of the form:
             # Dict[col_fam_name: List[option_value]]
             # where col_fam_name is the name of a column family for which

tools/advisor/advisor/db_stats_fetcher.py

@@ -3,17 +3,19 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
-from advisor.db_log_parser import Log
-from advisor.db_timeseries_parser import TimeSeriesData, NO_ENTITY
 import copy
 import glob
 import re
 import subprocess
 import time
+from typing import List
+
+from advisor.db_log_parser import Log
+from advisor.db_timeseries_parser import NO_ENTITY, TimeSeriesData
 
 
 class LogStatsParser(TimeSeriesData):
-    STATS = 'STATISTICS:'
+    STATS = "STATISTICS:"
 
     @staticmethod
     def parse_log_line_for_stats(log_line):
@@ -22,12 +24,8 @@ class LogStatsParser(TimeSeriesData):
         token_list = log_line.strip().split()
         # token_list = ['rocksdb.db.get.micros', 'P50', ':', '8.4', 'P95', ':',
         # '21.8', 'P99', ':', '33.9', 'P100', ':', '92.0']
-        stat_prefix = token_list[0] + '.'  # 'rocksdb.db.get.micros.'
-        stat_values = [
-            token
-            for token in token_list[1:]
-            if token != ':'
-        ]
+        stat_prefix = token_list[0] + "."  # 'rocksdb.db.get.micros.'
+        stat_values = [token for token in token_list[1:] if token != ":"]
         # stat_values = ['P50', '8.4', 'P95', '21.8', 'P99', '33.9', 'P100',
         # '92.0']
         stat_dict = {}
@@ -58,7 +56,7 @@ class LogStatsParser(TimeSeriesData):
                 # replace this with the appropriate key_prefix, remove these
                 # characters here since the LogStatsParser does not need
                 # a prefix
-                if key.startswith('[]'):
+                if key.startswith("[]"):
                     reqd_stats.append(key[2:])
                 else:
                     reqd_stats.append(key)
@@ -77,7 +75,7 @@ class LogStatsParser(TimeSeriesData):
         # ...
         # rocksdb.db.get.micros P50 : 15.6 P95 : 39.7 P99 : 62.6 P100 : 148.0\n
         # ..."
-        new_lines = log.get_message().split('\n')
+        new_lines = log.get_message().split("\n")
         # let log_ts = 1532518219
         log_ts = log.get_timestamp()
         # example updates to keys_ts:
@@ -95,20 +93,17 @@ class LogStatsParser(TimeSeriesData):
         # this method parses the Rocksdb LOG file and generates timeseries for
         # each of the statistic in the list reqd_stats
         self.keys_ts = {NO_ENTITY: {}}
-        for file_name in glob.glob(self.logs_file_prefix + '*'):
+        for file_name in glob.glob(self.logs_file_prefix + "*"):
             # TODO(poojam23): find a way to distinguish between 'old' log files
             # from current and previous experiments, present in the same
             # directory
-            if re.search('old', file_name, re.IGNORECASE):
+            if re.search("old", file_name, re.IGNORECASE):
                 continue
-            with open(file_name, 'r') as db_logs:
+            with open(file_name, "r") as db_logs:
                 new_log = None
                 for line in db_logs:
                     if Log.is_new_log(line):
-                        if (
-                            new_log and
-                            re.search(self.STATS, new_log.get_message())
-                        ):
+                        if new_log and re.search(self.STATS, new_log.get_message()):
                             self.add_to_timeseries(new_log, reqd_stats)
                         new_log = Log(line, column_families=[])
                     else:
@@ -123,13 +118,13 @@ class DatabasePerfContext(TimeSeriesData):
     # TODO(poojam23): check if any benchrunner provides PerfContext sampled at
     # regular intervals
     def __init__(self, perf_context_ts, stats_freq_sec, cumulative):
-        '''
+        """
         perf_context_ts is expected to be in the following format:
         Dict[metric, Dict[timestamp, value]], where for
         each (metric, timestamp) pair, the value is database-wide (i.e.
         summed over all the threads involved)
         if stats_freq_sec == 0, per-metric only one value is reported
-        '''
+        """
         super().__init__()
         self.stats_freq_sec = stats_freq_sec
         self.keys_ts = {NO_ENTITY: perf_context_ts}
@@ -148,11 +143,11 @@ class DatabasePerfContext(TimeSeriesData):
                 continue
             for ix, ts in enumerate(timeseries[:-1]):
                 epoch_ts[NO_ENTITY][stat][ts] = (
-                    epoch_ts[NO_ENTITY][stat][ts] -
-                    epoch_ts[NO_ENTITY][stat][timeseries[ix+1]]
+                    epoch_ts[NO_ENTITY][stat][ts]
+                    - epoch_ts[NO_ENTITY][stat][timeseries[ix + 1]]
                 )
                 if epoch_ts[NO_ENTITY][stat][ts] < 0:
-                    raise ValueError('DBPerfContext: really cumulative?')
+                    raise ValueError("DBPerfContext: really cumulative?")
             # drop the smallest timestamp in the timeseries for this metric
             epoch_ts[NO_ENTITY][stat].pop(timeseries[-1])
         self.keys_ts = epoch_ts
@@ -171,8 +166,8 @@ class DatabasePerfContext(TimeSeriesData):
 
 class OdsStatsFetcher(TimeSeriesData):
     # class constants
-    OUTPUT_FILE = 'temp/stats_out.tmp'
-    ERROR_FILE = 'temp/stats_err.tmp'
+    OUTPUT_FILE = "temp/stats_out.tmp"
+    ERROR_FILE = "temp/stats_err.tmp"
     RAPIDO_COMMAND = "%s --entity=%s --key=%s --tstart=%s --tend=%s --showtime"
 
     # static methods
@@ -183,9 +178,9 @@ class OdsStatsFetcher(TimeSeriesData):
     @staticmethod
     def _get_time_value_pair(pair_string):
         # example pair_string: '[1532544591, 97.3653601828]'
-        pair_string = pair_string.replace('[', '')
-        pair_string = pair_string.replace(']', '')
-        pair = pair_string.split(',')
+        pair_string = pair_string.replace("[", "")
+        pair_string = pair_string.replace("]", "")
+        pair = pair_string.split(",")
         first = int(pair[0].strip())
         second = float(pair[1].strip())
         return [first, second]
@@ -193,12 +188,10 @@ class OdsStatsFetcher(TimeSeriesData):
     @staticmethod
     def _get_ods_cli_stime(start_time):
         diff = int(time.time() - int(start_time))
-        stime = str(diff) + '_s'
+        stime = str(diff) + "_s"
         return stime
 
-    def __init__(
-        self, client, entities, start_time, end_time, key_prefix=None
-    ):
+    def __init__(self, client, entities, start_time, end_time, key_prefix=None):
         super().__init__()
         self.client = client
         self.entities = entities
@@ -209,7 +202,7 @@ class OdsStatsFetcher(TimeSeriesData):
         self.duration_sec = 60
 
     def execute_script(self, command):
-        print('executing...')
+        print("executing...")
         print(command)
         out_file = open(self.OUTPUT_FILE, "w+")
         err_file = open(self.ERROR_FILE, "w+")
@@ -222,9 +215,9 @@ class OdsStatsFetcher(TimeSeriesData):
         # <entity_name>\t<key_name>\t[[ts, value], [ts, value], ...]
         # ts = timestamp; value = value of key_name in entity_name at time ts
         self.keys_ts = {}
-        with open(self.OUTPUT_FILE, 'r') as fp:
+        with open(self.OUTPUT_FILE, "r") as fp:
             for line in fp:
-                token_list = line.strip().split('\t')
+                token_list = line.strip().split("\t")
                 entity = token_list[0]
                 key = token_list[1]
                 if entity not in self.keys_ts:
@@ -233,7 +226,7 @@ class OdsStatsFetcher(TimeSeriesData):
                     self.keys_ts[entity][key] = {}
                 list_of_lists = [
                     self._get_time_value_pair(pair_string)
-                    for pair_string in token_list[2].split('],')
+                    for pair_string in token_list[2].split("],")
                 ]
                 value = {pair[0]: pair[1] for pair in list_of_lists}
                 self.keys_ts[entity][key] = value
@@ -243,7 +236,7 @@ class OdsStatsFetcher(TimeSeriesData):
         # <entity_name>\t<key_name>\t<timestamp>\t<value>
         # there is one line per (entity_name, key_name, timestamp)
         self.keys_ts = {}
-        with open(self.OUTPUT_FILE, 'r') as fp:
+        with open(self.OUTPUT_FILE, "r") as fp:
             for line in fp:
                 token_list = line.split()
                 entity = token_list[0]
@@ -257,25 +250,29 @@ class OdsStatsFetcher(TimeSeriesData):
     def fetch_timeseries(self, statistics):
         # this method fetches the timeseries of required stats from the ODS
         # service and populates the 'keys_ts' object appropriately
-        print('OdsStatsFetcher: fetching ' + str(statistics))
-        if re.search('rapido', self.client, re.IGNORECASE):
+        print("OdsStatsFetcher: fetching " + str(statistics))
+        if re.search("rapido", self.client, re.IGNORECASE):
             command = self.RAPIDO_COMMAND % (
                 self.client,
                 self._get_string_in_quotes(self.entities),
-                self._get_string_in_quotes(','.join(statistics)),
+                self._get_string_in_quotes(",".join(statistics)),
                 self._get_string_in_quotes(self.start_time),
-                self._get_string_in_quotes(self.end_time)
+                self._get_string_in_quotes(self.end_time),
             )
             # Run the tool and fetch the time-series data
             self.execute_script(command)
             # Parse output and populate the 'keys_ts' map
             self.parse_rapido_output()
-        elif re.search('ods', self.client, re.IGNORECASE):
+        elif re.search("ods", self.client, re.IGNORECASE):
             command = (
-                self.client + ' ' +
-                '--stime=' + self._get_ods_cli_stime(self.start_time) + ' ' +
-                self._get_string_in_quotes(self.entities) + ' ' +
-                self._get_string_in_quotes(','.join(statistics))
+                self.client
+                + " "
+                + "--stime="
+                + self._get_ods_cli_stime(self.start_time)
+                + " "
+                + self._get_string_in_quotes(self.entities)
+                + " "
+                + self._get_string_in_quotes(",".join(statistics))
             )
             # Run the tool and fetch the time-series data
             self.execute_script(command)
@@ -287,7 +284,7 @@ class OdsStatsFetcher(TimeSeriesData):
         for cond in conditions:
             for key in cond.keys:
                 use_prefix = False
-                if key.startswith('[]'):
+                if key.startswith("[]"):
                     use_prefix = True
                     key = key[2:]
                 # TODO(poojam23): this is very hacky and needs to be improved
@@ -295,15 +292,15 @@ class OdsStatsFetcher(TimeSeriesData):
                     key += ".60"
                 if use_prefix:
                     if not self.key_prefix:
-                        print('Warning: OdsStatsFetcher might need key prefix')
-                        print('for the key: ' + key)
+                        print("Warning: OdsStatsFetcher might need key prefix")
+                        print("for the key: " + key)
                     else:
                         key = self.key_prefix + "." + key
                 reqd_stats.append(key)
         return reqd_stats
 
-    def fetch_rate_url(self, entities, keys, window_len, percent, display):
-        # type: (List[str], List[str], str, str, bool) -> str
+    def fetch_rate_url(self, entities: List[str], keys: List[str],
+        window_len: str, percent: str, display: bool) -> str:
         transform_desc = (
             "rate(" + str(window_len) + ",duration=" + str(self.duration_sec)
         )
@@ -311,28 +308,33 @@ class OdsStatsFetcher(TimeSeriesData):
             transform_desc = transform_desc + ",%)"
         else:
             transform_desc = transform_desc + ")"
-        if re.search('rapido', self.client, re.IGNORECASE):
+        if re.search("rapido", self.client, re.IGNORECASE):
             command = self.RAPIDO_COMMAND + " --transform=%s --url=%s"
             command = command % (
                 self.client,
-                self._get_string_in_quotes(','.join(entities)),
-                self._get_string_in_quotes(','.join(keys)),
+                self._get_string_in_quotes(",".join(entities)),
+                self._get_string_in_quotes(",".join(keys)),
                 self._get_string_in_quotes(self.start_time),
                 self._get_string_in_quotes(self.end_time),
                 self._get_string_in_quotes(transform_desc),
-                self._get_string_in_quotes(display)
+                self._get_string_in_quotes(display),
             )
-        elif re.search('ods', self.client, re.IGNORECASE):
+        elif re.search("ods", self.client, re.IGNORECASE):
             command = (
-                self.client + ' ' +
-                '--stime=' + self._get_ods_cli_stime(self.start_time) + ' ' +
-                '--fburlonly ' +
-                self._get_string_in_quotes(entities) + ' ' +
-                self._get_string_in_quotes(','.join(keys)) + ' ' +
-                self._get_string_in_quotes(transform_desc)
+                self.client
+                + " "
+                + "--stime="
+                + self._get_ods_cli_stime(self.start_time)
+                + " "
+                + "--fburlonly "
+                + self._get_string_in_quotes(entities)
+                + " "
+                + self._get_string_in_quotes(",".join(keys))
+                + " "
+                + self._get_string_in_quotes(transform_desc)
             )
         self.execute_script(command)
         url = ""
-        with open(self.OUTPUT_FILE, 'r') as fp:
+        with open(self.OUTPUT_FILE, "r") as fp:
             url = fp.readline()
         return url

tools/advisor/advisor/db_timeseries_parser.py

@@ -3,13 +3,15 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
+import math
 from abc import abstractmethod
-from advisor.db_log_parser import DataSource
 from enum import Enum
-import math
+from typing import Dict
+
+from advisor.db_log_parser import DataSource
 
 
-NO_ENTITY = 'ENTITY_PLACEHOLDER'
+NO_ENTITY = "ENTITY_PLACEHOLDER"
 
 
 class TimeSeriesData(DataSource):
@@ -42,10 +44,8 @@ class TimeSeriesData(DataSource):
         # for each of them and populates the 'keys_ts' dictionary
         pass
 
-    def fetch_burst_epochs(
-        self, entities, statistic, window_sec, threshold, percent
-    ):
-        # type: (str, int, float, bool) -> Dict[str, Dict[int, float]]
+    def fetch_burst_epochs(self, entities: str, statistic: int,
+        window_sec: float, threshold: bool, percent: bool) -> Dict[str, Dict[int, float]]:
         # this method calculates the (percent) rate change in the 'statistic'
         # for each entity (over 'window_sec' seconds) and returns the epochs
         # where this rate change is greater than or equal to the 'threshold'
@@ -90,7 +90,6 @@ class TimeSeriesData(DataSource):
         return burst_epochs
 
     def fetch_aggregated_values(self, entity, statistics, aggregation_op):
-        # type: (str, AggregationOperator) -> Dict[str, float]
         # this method performs the aggregation specified by 'aggregation_op'
         # on the timeseries of 'statistics' for 'entity' and returns:
         # Dict[statistic, aggregated_value]
@@ -145,7 +144,7 @@ class TimeSeriesData(DataSource):
                     complete_keys[0],  # there should be only one key
                     cond.window_sec,
                     cond.rate_threshold,
-                    True
+                    True,
                 )
                 # Trigger in this case is:
                 # Dict[entity_name, Dict[timestamp, rate_change]]
@@ -156,32 +155,28 @@ class TimeSeriesData(DataSource):
                     cond.set_trigger(result)
             elif cond.behavior is self.Behavior.evaluate_expression:
                 self.handle_evaluate_expression(
-                    cond,
-                    complete_keys,
-                    entities_with_stats
+                    cond, complete_keys, entities_with_stats
                 )
 
     def handle_evaluate_expression(self, condition, statistics, entities):
         trigger = {}
         # check 'condition' for each of these entities
         for entity in entities:
-            if hasattr(condition, 'aggregation_op'):
+            if hasattr(condition, "aggregation_op"):
                 # in this case, the aggregation operation is performed on each
                 # of the condition's 'keys' and then with aggregated values
                 # condition's 'expression' is evaluated; if it evaluates to
                 # True, then list of the keys values is added to the
                 # condition's trigger: Dict[entity_name, List[stats]]
                 result = self.fetch_aggregated_values(
-                        entity, statistics, condition.aggregation_op
+                    entity, statistics, condition.aggregation_op
                 )
                 keys = [result[key] for key in statistics]
                 try:
                     if eval(condition.expression):
                         trigger[entity] = keys
                 except Exception as e:
-                    print(
-                        'WARNING(TimeSeriesData) check_and_trigger: ' + str(e)
-                    )
+                    print("WARNING(TimeSeriesData) check_and_trigger: " + str(e))
             else:
                 # assumption: all stats have same series of timestamps
                 # this is similar to the above but 'expression' is evaluated at
@@ -190,19 +185,13 @@ class TimeSeriesData(DataSource):
                 # 'expression' evaluated to true; so trigger is:
                 # Dict[entity, Dict[timestamp, List[stats]]]
                 for epoch in self.keys_ts[entity][statistics[0]].keys():
-                    keys = [
-                        self.keys_ts[entity][key][epoch]
-                        for key in statistics
-                    ]
+                    keys = [self.keys_ts[entity][key][epoch] for key in statistics]
                     try:
                         if eval(condition.expression):
                             if entity not in trigger:
                                 trigger[entity] = {}
                             trigger[entity][epoch] = keys
                     except Exception as e:
-                        print(
-                            'WARNING(TimeSeriesData) check_and_trigger: ' +
-                            str(e)
-                        )
+                        print("WARNING(TimeSeriesData) check_and_trigger: " + str(e))
         if trigger:
             condition.set_trigger(trigger)

tools/advisor/advisor/ini_parser.py

@@ -17,7 +17,7 @@ class IniParser:
     @staticmethod
     def remove_trailing_comment(line):
         line = line.strip()
-        comment_start = line.find('#')
+        comment_start = line.find("#")
         if comment_start > -1:
             return line[:comment_start]
         return line
@@ -27,7 +27,7 @@ class IniParser:
         # A section header looks like: [Rule "my-new-rule"]. Essentially,
         # a line that is in square-brackets.
         line = line.strip()
-        if line.startswith('[') and line.endswith(']'):
+        if line.startswith("[") and line.endswith("]"):
             return True
         return False
 
@@ -38,7 +38,7 @@ class IniParser:
         token_list = line.strip()[1:-1].split('"')
         if len(token_list) < 3:
             error = 'needed section header: [<section_type> "<section_name>"]'
-            raise ValueError('Parsing error: ' + error + '\n' + line)
+            raise ValueError("Parsing error: " + error + "\n" + line)
         return token_list[1]
 
     @staticmethod
@@ -47,22 +47,22 @@ class IniParser:
         if not line:
             return IniParser.Element.comment
         if IniParser.is_section_header(line):
-            if line.strip()[1:-1].startswith('Suggestion'):
+            if line.strip()[1:-1].startswith("Suggestion"):
                 return IniParser.Element.sugg
-            if line.strip()[1:-1].startswith('Rule'):
+            if line.strip()[1:-1].startswith("Rule"):
                 return IniParser.Element.rule
-            if line.strip()[1:-1].startswith('Condition'):
+            if line.strip()[1:-1].startswith("Condition"):
                 return IniParser.Element.cond
-        if '=' in line:
+        if "=" in line:
             return IniParser.Element.key_val
-        error = 'not a recognizable RulesSpec element'
-        raise ValueError('Parsing error: ' + error + '\n' + line)
+        error = "not a recognizable RulesSpec element"
+        raise ValueError("Parsing error: " + error + "\n" + line)
 
     @staticmethod
     def get_key_value_pair(line):
         line = line.strip()
-        key = line.split('=')[0].strip()
-        value = "=".join(line.split('=')[1:])
+        key = line.split("=")[0].strip()
+        value = "=".join(line.split("=")[1:])
         if value == "":  # if the option has no value
             return (key, None)
         values = IniParser.get_list_from_value(value)
@@ -72,5 +72,5 @@ class IniParser:
 
     @staticmethod
     def get_list_from_value(value):
-        values = value.strip().split(':')
+        values = value.strip().split(":")
         return values

tools/advisor/advisor/rule_parser.py

@@ -3,12 +3,13 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
+import re
 from abc import ABC, abstractmethod
+from enum import Enum
+
 from advisor.db_log_parser import DataSource, NO_COL_FAMILY
 from advisor.db_timeseries_parser import TimeSeriesData
-from enum import Enum
 from advisor.ini_parser import IniParser
-import re
 
 
 class Section(ABC):
@@ -38,17 +39,17 @@ class Rule(Section):
         # value will be a string and not a list. Hence, convert it to a single
         # element list before storing it in self.suggestions or
         # self.conditions.
-        if key == 'conditions':
+        if key == "conditions":
             if isinstance(value, str):
                 self.conditions = [value]
             else:
                 self.conditions = value
-        elif key == 'suggestions':
+        elif key == "suggestions":
             if isinstance(value, str):
                 self.suggestions = [value]
             else:
                 self.suggestions = value
-        elif key == 'overlap_time_period':
+        elif key == "overlap_time_period":
             self.overlap_time_seconds = value
 
     def get_suggestions(self):
@@ -56,35 +57,29 @@ class Rule(Section):
 
     def perform_checks(self):
         if not self.conditions or len(self.conditions) < 1:
-            raise ValueError(
-                self.name + ': rule must have at least one condition'
-            )
+            raise ValueError(self.name + ": rule must have at least one condition")
         if not self.suggestions or len(self.suggestions) < 1:
-            raise ValueError(
-                self.name + ': rule must have at least one suggestion'
-            )
+            raise ValueError(self.name + ": rule must have at least one suggestion")
         if self.overlap_time_seconds:
             if len(self.conditions) != 2:
                 raise ValueError(
-                    self.name + ": rule must be associated with 2 conditions\
+                    self.name
+                    + ": rule must be associated with 2 conditions\
                     in order to check for a time dependency between them"
                 )
-            time_format = '^\d+[s|m|h|d]$'
-            if (
-                not
-                re.match(time_format, self.overlap_time_seconds, re.IGNORECASE)
-            ):
+            time_format = "^\d+[s|m|h|d]$" # noqa
+            if not re.match(time_format, self.overlap_time_seconds, re.IGNORECASE):
                 raise ValueError(
                     self.name + ": overlap_time_seconds format: \d+[s|m|h|d]"
                 )
             else:  # convert to seconds
                 in_seconds = int(self.overlap_time_seconds[:-1])
-                if self.overlap_time_seconds[-1] == 'm':
+                if self.overlap_time_seconds[-1] == "m":
                     in_seconds *= 60
-                elif self.overlap_time_seconds[-1] == 'h':
-                    in_seconds *= (60 * 60)
-                elif self.overlap_time_seconds[-1] == 'd':
-                    in_seconds *= (24 * 60 * 60)
+                elif self.overlap_time_seconds[-1] == "h":
+                    in_seconds *= 60 * 60
+                elif self.overlap_time_seconds[-1] == "d":
+                    in_seconds *= 24 * 60 * 60
                 self.overlap_time_seconds = in_seconds
 
     def get_overlap_timestamps(self, key1_trigger_epochs, key2_trigger_epochs):
@@ -93,28 +88,25 @@ class Rule(Section):
         # (if present) the first pair of timestamps at which the 2 conditions
         # were triggered within 'overlap_time_seconds' of each other
         key1_lower_bounds = [
-            epoch - self.overlap_time_seconds
-            for epoch in key1_trigger_epochs
+            epoch - self.overlap_time_seconds for epoch in key1_trigger_epochs
         ]
         key1_lower_bounds.sort()
         key2_trigger_epochs.sort()
         trigger_ix = 0
         overlap_pair = None
         for key1_lb in key1_lower_bounds:
-            while (
-                key2_trigger_epochs[trigger_ix] < key1_lb and
-                trigger_ix < len(key2_trigger_epochs)
+            while key2_trigger_epochs[trigger_ix] < key1_lb and trigger_ix < len(
+                key2_trigger_epochs
             ):
                 trigger_ix += 1
             if trigger_ix >= len(key2_trigger_epochs):
                 break
-            if (
-                key2_trigger_epochs[trigger_ix] <=
-                key1_lb + (2 * self.overlap_time_seconds)
+            if key2_trigger_epochs[trigger_ix] <= key1_lb + (
+                2 * self.overlap_time_seconds
             ):
                 overlap_pair = (
                     key2_trigger_epochs[trigger_ix],
-                    key1_lb + self.overlap_time_seconds
+                    key1_lb + self.overlap_time_seconds,
                 )
                 break
         return overlap_pair
@@ -130,10 +122,10 @@ class Rule(Section):
             condition1 = conditions_dict[self.conditions[0]]
             condition2 = conditions_dict[self.conditions[1]]
             if not (
-                condition1.get_data_source() is DataSource.Type.TIME_SERIES and
-                condition2.get_data_source() is DataSource.Type.TIME_SERIES
+                condition1.get_data_source() is DataSource.Type.TIME_SERIES
+                and condition2.get_data_source() is DataSource.Type.TIME_SERIES
             ):
-                raise ValueError(self.name + ': need 2 timeseries conditions')
+                raise ValueError(self.name + ": need 2 timeseries conditions")
 
             map1 = condition1.get_trigger()
             map2 = condition2.get_trigger()
@@ -142,14 +134,10 @@ class Rule(Section):
 
             self.trigger_entities = {}
             is_triggered = False
-            entity_intersection = (
-                set(map1.keys()).intersection(set(map2.keys()))
-            )
+            entity_intersection = set(map1.keys()).intersection(set(map2.keys()))
             for entity in entity_intersection:
-                overlap_timestamps_pair = (
-                    self.get_overlap_timestamps(
-                        list(map1[entity].keys()), list(map2[entity].keys())
-                    )
+                overlap_timestamps_pair = self.get_overlap_timestamps(
+                    list(map1[entity].keys()), list(map2[entity].keys())
                 )
                 if overlap_timestamps_pair:
                     self.trigger_entities[entity] = overlap_timestamps_pair
@@ -166,8 +154,8 @@ class Rule(Section):
                     all_conditions_triggered = False
                     break
                 if (
-                    cond.get_data_source() is DataSource.Type.LOG or
-                    cond.get_data_source() is DataSource.Type.DB_OPTIONS
+                    cond.get_data_source() is DataSource.Type.LOG
+                    or cond.get_data_source() is DataSource.Type.DB_OPTIONS
                 ):
                     cond_col_fam = set(cond.get_trigger().keys())
                     if NO_COL_FAMILY in cond_col_fam:
@@ -180,8 +168,8 @@ class Rule(Section):
                     if self.trigger_entities is None:
                         self.trigger_entities = cond_entities
                     else:
-                        self.trigger_entities = (
-                            self.trigger_entities.intersection(cond_entities)
+                        self.trigger_entities = self.trigger_entities.intersection(
+                            cond_entities
                         )
                 if not (self.trigger_entities or self.trigger_column_families):
                     all_conditions_triggered = False
@@ -200,7 +188,7 @@ class Rule(Section):
                 rule_string += cond
                 is_first = False
             else:
-                rule_string += (" AND " + cond)
+                rule_string += " AND " + cond
         # Append suggestions
         rule_string += "\nsuggestions:: "
         is_first = True
@@ -209,11 +197,11 @@ class Rule(Section):
                 rule_string += sugg
                 is_first = False
             else:
-                rule_string += (", " + sugg)
+                rule_string += ", " + sugg
         if self.trigger_entities:
-            rule_string += (', entities:: ' + str(self.trigger_entities))
+            rule_string += ", entities:: " + str(self.trigger_entities)
         if self.trigger_column_families:
-            rule_string += (', col_fam:: ' + str(self.trigger_column_families))
+            rule_string += ", col_fam:: " + str(self.trigger_column_families)
         # Return constructed string
         return rule_string
 
@@ -232,7 +220,7 @@ class Suggestion(Section):
         self.description = None
 
     def set_parameter(self, key, value):
-        if key == 'option':
+        if key == "option":
             # Note:
             # case 1: 'option' is supported by Rocksdb OPTIONS file; in this
             # case the option belongs to one of the sections in the config
@@ -240,41 +228,35 @@ class Suggestion(Section):
             # case 2: 'option' is not supported by Rocksdb OPTIONS file; the
             # option is not expected to have the character '.' in its name
             self.option = value
-        elif key == 'action':
+        elif key == "action":
             if self.option and not value:
-                raise ValueError(self.name + ': provide action for option')
+                raise ValueError(self.name + ": provide action for option")
             self.action = self.Action[value]
-        elif key == 'suggested_values':
+        elif key == "suggested_values":
             if isinstance(value, str):
                 self.suggested_values = [value]
             else:
                 self.suggested_values = value
-        elif key == 'description':
+        elif key == "description":
             self.description = value
 
     def perform_checks(self):
         if not self.description:
             if not self.option:
-                raise ValueError(self.name + ': provide option or description')
+                raise ValueError(self.name + ": provide option or description")
             if not self.action:
-                raise ValueError(self.name + ': provide action for option')
+                raise ValueError(self.name + ": provide action for option")
             if self.action is self.Action.set and not self.suggested_values:
-                raise ValueError(
-                    self.name + ': provide suggested value for option'
-                )
+                raise ValueError(self.name + ": provide suggested value for option")
 
     def __repr__(self):
         sugg_string = "Suggestion: " + self.name
         if self.description:
-            sugg_string += (' description : ' + self.description)
+            sugg_string += " description : " + self.description
         else:
-            sugg_string += (
-                ' option : ' + self.option + ' action : ' + self.action.name
-            )
+            sugg_string += " option : " + self.option + " action : " + self.action.name
             if self.suggested_values:
-                sugg_string += (
-                    ' suggested_values : ' + str(self.suggested_values)
-                )
+                sugg_string += " suggested_values : " + str(self.suggested_values)
         return sugg_string
 
 
@@ -286,7 +268,7 @@ class Condition(Section):
 
     def perform_checks(self):
         if not self.data_source:
-            raise ValueError(self.name + ': condition not tied to data source')
+            raise ValueError(self.name + ": condition not tied to data source")
 
     def set_data_source(self, data_source):
         self.data_source = data_source
@@ -310,28 +292,28 @@ class Condition(Section):
 
     def set_parameter(self, key, value):
         # must be defined by the subclass
-        raise NotImplementedError(self.name + ': provide source for condition')
+        raise NotImplementedError(self.name + ": provide source for condition")
 
 
 class LogCondition(Condition):
     @classmethod
     def create(cls, base_condition):
-        base_condition.set_data_source(DataSource.Type['LOG'])
+        base_condition.set_data_source(DataSource.Type["LOG"])
         base_condition.__class__ = cls
         return base_condition
 
     def set_parameter(self, key, value):
-        if key == 'regex':
+        if key == "regex":
             self.regex = value
 
     def perform_checks(self):
         super().perform_checks()
         if not self.regex:
-            raise ValueError(self.name + ': provide regex for log condition')
+            raise ValueError(self.name + ": provide regex for log condition")
 
     def __repr__(self):
         log_cond_str = "LogCondition: " + self.name
-        log_cond_str += (" regex: " + self.regex)
+        log_cond_str += " regex: " + self.regex
         # if self.trigger:
         #     log_cond_str += (" trigger: " + str(self.trigger))
         return log_cond_str
@@ -340,90 +322,90 @@ class LogCondition(Condition):
 class OptionCondition(Condition):
     @classmethod
     def create(cls, base_condition):
-        base_condition.set_data_source(DataSource.Type['DB_OPTIONS'])
+        base_condition.set_data_source(DataSource.Type["DB_OPTIONS"])
         base_condition.__class__ = cls
         return base_condition
 
     def set_parameter(self, key, value):
-        if key == 'options':
+        if key == "options":
             if isinstance(value, str):
                 self.options = [value]
             else:
                 self.options = value
-        elif key == 'evaluate':
+        elif key == "evaluate":
             self.eval_expr = value
 
     def perform_checks(self):
         super().perform_checks()
         if not self.options:
-            raise ValueError(self.name + ': options missing in condition')
+            raise ValueError(self.name + ": options missing in condition")
         if not self.eval_expr:
-            raise ValueError(self.name + ': expression missing in condition')
+            raise ValueError(self.name + ": expression missing in condition")
 
     def __repr__(self):
         opt_cond_str = "OptionCondition: " + self.name
-        opt_cond_str += (" options: " + str(self.options))
-        opt_cond_str += (" expression: " + self.eval_expr)
+        opt_cond_str += " options: " + str(self.options)
+        opt_cond_str += " expression: " + self.eval_expr
         if self.trigger:
-            opt_cond_str += (" trigger: " + str(self.trigger))
+            opt_cond_str += " trigger: " + str(self.trigger)
         return opt_cond_str
 
 
 class TimeSeriesCondition(Condition):
     @classmethod
     def create(cls, base_condition):
-        base_condition.set_data_source(DataSource.Type['TIME_SERIES'])
+        base_condition.set_data_source(DataSource.Type["TIME_SERIES"])
         base_condition.__class__ = cls
         return base_condition
 
     def set_parameter(self, key, value):
-        if key == 'keys':
+        if key == "keys":
             if isinstance(value, str):
                 self.keys = [value]
             else:
                 self.keys = value
-        elif key == 'behavior':
+        elif key == "behavior":
             self.behavior = TimeSeriesData.Behavior[value]
-        elif key == 'rate_threshold':
+        elif key == "rate_threshold":
             self.rate_threshold = float(value)
-        elif key == 'window_sec':
+        elif key == "window_sec":
             self.window_sec = int(value)
-        elif key == 'evaluate':
+        elif key == "evaluate":
             self.expression = value
-        elif key == 'aggregation_op':
+        elif key == "aggregation_op":
             self.aggregation_op = TimeSeriesData.AggregationOperator[value]
 
     def perform_checks(self):
         if not self.keys:
-            raise ValueError(self.name + ': specify timeseries key')
+            raise ValueError(self.name + ": specify timeseries key")
         if not self.behavior:
-            raise ValueError(self.name + ': specify triggering behavior')
+            raise ValueError(self.name + ": specify triggering behavior")
         if self.behavior is TimeSeriesData.Behavior.bursty:
             if not self.rate_threshold:
-                raise ValueError(self.name + ': specify rate burst threshold')
+                raise ValueError(self.name + ": specify rate burst threshold")
             if not self.window_sec:
                 self.window_sec = 300  # default window length is 5 minutes
             if len(self.keys) > 1:
-                raise ValueError(self.name + ': specify only one key')
+                raise ValueError(self.name + ": specify only one key")
         elif self.behavior is TimeSeriesData.Behavior.evaluate_expression:
             if not (self.expression):
-                raise ValueError(self.name + ': specify evaluation expression')
+                raise ValueError(self.name + ": specify evaluation expression")
         else:
-            raise ValueError(self.name + ': trigger behavior not supported')
+            raise ValueError(self.name + ": trigger behavior not supported")
 
     def __repr__(self):
         ts_cond_str = "TimeSeriesCondition: " + self.name
-        ts_cond_str += (" statistics: " + str(self.keys))
-        ts_cond_str += (" behavior: " + self.behavior.name)
+        ts_cond_str += " statistics: " + str(self.keys)
+        ts_cond_str += " behavior: " + self.behavior.name
         if self.behavior is TimeSeriesData.Behavior.bursty:
-            ts_cond_str += (" rate_threshold: " + str(self.rate_threshold))
-            ts_cond_str += (" window_sec: " + str(self.window_sec))
+            ts_cond_str += " rate_threshold: " + str(self.rate_threshold)
+            ts_cond_str += " window_sec: " + str(self.window_sec)
         if self.behavior is TimeSeriesData.Behavior.evaluate_expression:
-            ts_cond_str += (" expression: " + self.expression)
-            if hasattr(self, 'aggregation_op'):
-                ts_cond_str += (" aggregation_op: " + self.aggregation_op.name)
+            ts_cond_str += " expression: " + self.expression
+            if hasattr(self, "aggregation_op"):
+                ts_cond_str += " aggregation_op: " + self.aggregation_op.name
         if self.trigger:
-            ts_cond_str += (" trigger: " + str(self.trigger))
+            ts_cond_str += " trigger: " + str(self.trigger)
         return ts_cond_str
 
 
@@ -446,7 +428,7 @@ class RulesSpec:
 
     def load_rules_from_spec(self):
         self.initialise_fields()
-        with open(self.file_path, 'r') as db_rules:
+        with open(self.file_path, "r") as db_rules:
             curr_section = None
             for line in db_rules:
                 line = IniParser.remove_trailing_comment(line)
@@ -472,12 +454,12 @@ class RulesSpec:
                     if curr_section is IniParser.Element.rule:
                         new_rule.set_parameter(key, value)
                     elif curr_section is IniParser.Element.cond:
-                        if key == 'source':
-                            if value == 'LOG':
+                        if key == "source":
+                            if value == "LOG":
                                 new_cond = LogCondition.create(new_cond)
-                            elif value == 'OPTIONS':
+                            elif value == "OPTIONS":
                                 new_cond = OptionCondition.create(new_cond)
-                            elif value == 'TIME_SERIES':
+                            elif value == "TIME_SERIES":
                                 new_cond = TimeSeriesCondition.create(new_cond)
                         else:
                             new_cond.set_parameter(key, value)
@@ -515,14 +497,14 @@ class RulesSpec:
 
     def print_rules(self, rules):
         for rule in rules:
-            print('\nRule: ' + rule.name)
+            print("\nRule: " + rule.name)
             for cond_name in rule.conditions:
                 print(repr(self.conditions_dict[cond_name]))
             for sugg_name in rule.suggestions:
                 print(repr(self.suggestions_dict[sugg_name]))
             if rule.trigger_entities:
-                print('scope: entities:')
+                print("scope: entities:")
                 print(rule.trigger_entities)
             if rule.trigger_column_families:
-                print('scope: col_fam:')
+                print("scope: col_fam:")
                 print(rule.trigger_column_families)

tools/advisor/advisor/rule_parser_example.py

@@ -3,11 +3,12 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
-from advisor.rule_parser import RulesSpec
+import argparse
+
 from advisor.db_log_parser import DatabaseLogs, DataSource
 from advisor.db_options_parser import DatabaseOptions
 from advisor.db_stats_fetcher import LogStatsParser, OdsStatsFetcher
-import argparse
+from advisor.rule_parser import RulesSpec
 
 
 def main(args):
@@ -18,9 +19,7 @@ def main(args):
     # initialize the DatabaseOptions object
     db_options = DatabaseOptions(args.rocksdb_options)
     # Create DatabaseLogs object
-    db_logs = DatabaseLogs(
-        args.log_files_path_prefix, db_options.get_column_families()
-    )
+    db_logs = DatabaseLogs(args.log_files_path_prefix, db_options.get_column_families())
     # Create the Log STATS object
     db_log_stats = LogStatsParser(
         args.log_files_path_prefix, args.stats_dump_period_sec
@@ -28,62 +27,72 @@ def main(args):
     data_sources = {
         DataSource.Type.DB_OPTIONS: [db_options],
         DataSource.Type.LOG: [db_logs],
-        DataSource.Type.TIME_SERIES: [db_log_stats]
+        DataSource.Type.TIME_SERIES: [db_log_stats],
     }
     if args.ods_client:
-        data_sources[DataSource.Type.TIME_SERIES].append(OdsStatsFetcher(
-            args.ods_client,
-            args.ods_entity,
-            args.ods_tstart,
-            args.ods_tend,
-            args.ods_key_prefix
-        ))
+        data_sources[DataSource.Type.TIME_SERIES].append(
+            OdsStatsFetcher(
+                args.ods_client,
+                args.ods_entity,
+                args.ods_tstart,
+                args.ods_tend,
+                args.ods_key_prefix,
+            )
+        )
     triggered_rules = rule_spec_parser.get_triggered_rules(
         data_sources, db_options.get_column_families()
     )
     rule_spec_parser.print_rules(triggered_rules)
 
 
-if __name__ == '__main__':
-    parser = argparse.ArgumentParser(description='Use this script to get\
-        suggestions for improving Rocksdb performance.')
-    parser.add_argument(
-        '--rules_spec', required=True, type=str,
-        help='path of the file containing the expert-specified Rules'
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        description="Use this script to get\
+        suggestions for improving Rocksdb performance."
     )
     parser.add_argument(
-        '--rocksdb_options', required=True, type=str,
-        help='path of the starting Rocksdb OPTIONS file'
+        "--rules_spec",
+        required=True,
+        type=str,
+        help="path of the file containing the expert-specified Rules",
     )
     parser.add_argument(
-        '--log_files_path_prefix', required=True, type=str,
-        help='path prefix of the Rocksdb LOG files'
+        "--rocksdb_options",
+        required=True,
+        type=str,
+        help="path of the starting Rocksdb OPTIONS file",
     )
     parser.add_argument(
-        '--stats_dump_period_sec', required=True, type=int,
-        help='the frequency (in seconds) at which STATISTICS are printed to ' +
-        'the Rocksdb LOG file'
+        "--log_files_path_prefix",
+        required=True,
+        type=str,
+        help="path prefix of the Rocksdb LOG files",
     )
-    # ODS arguments
     parser.add_argument(
-        '--ods_client', type=str, help='the ODS client binary'
+        "--stats_dump_period_sec",
+        required=True,
+        type=int,
+        help="the frequency (in seconds) at which STATISTICS are printed to "
+        + "the Rocksdb LOG file",
     )
+    # ODS arguments
+    parser.add_argument("--ods_client", type=str, help="the ODS client binary")
     parser.add_argument(
-        '--ods_entity', type=str,
-        help='the servers for which the ODS stats need to be fetched'
+        "--ods_entity",
+        type=str,
+        help="the servers for which the ODS stats need to be fetched",
     )
     parser.add_argument(
-        '--ods_key_prefix', type=str,
-        help='the prefix that needs to be attached to the keys of time ' +
-        'series to be fetched from ODS'
+        "--ods_key_prefix",
+        type=str,
+        help="the prefix that needs to be attached to the keys of time "
+        + "series to be fetched from ODS",
     )
     parser.add_argument(
-        '--ods_tstart', type=int,
-        help='start time of timeseries to be fetched from ODS'
+        "--ods_tstart", type=int, help="start time of timeseries to be fetched from ODS"
     )
     parser.add_argument(
-        '--ods_tend', type=int,
-        help='end time of timeseries to be fetched from ODS'
+        "--ods_tend", type=int, help="end time of timeseries to be fetched from ODS"
     )
     args = parser.parse_args()
     main(args)

tools/advisor/test/test_db_bench_runner.py

@@ -3,24 +3,25 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
-from advisor.db_bench_runner import DBBenchRunner
-from advisor.db_log_parser import NO_COL_FAMILY, DataSource
-from advisor.db_options_parser import DatabaseOptions
 import os
 import unittest
 
+from advisor.db_bench_runner import DBBenchRunner
+from advisor.db_log_parser import DataSource, NO_COL_FAMILY
+from advisor.db_options_parser import DatabaseOptions
+
 
 class TestDBBenchRunnerMethods(unittest.TestCase):
     def setUp(self):
         self.pos_args = [
-            './../../db_bench',
-            'overwrite',
-            'use_existing_db=true',
-            'duration=10'
+            "./../../db_bench",
+            "overwrite",
+            "use_existing_db=true",
+            "duration=10",
         ]
         self.bench_runner = DBBenchRunner(self.pos_args)
         this_path = os.path.abspath(os.path.dirname(__file__))
-        options_path = os.path.join(this_path, 'input_files/OPTIONS-000005')
+        options_path = os.path.join(this_path, "input_files/OPTIONS-000005")
         self.db_options = DatabaseOptions(options_path)
 
     def test_setup(self):
@@ -31,71 +32,70 @@ class TestDBBenchRunnerMethods(unittest.TestCase):
         )
 
     def test_get_info_log_file_name(self):
-        log_file_name = DBBenchRunner.get_info_log_file_name(
-            None, 'random_path'
-        )
-        self.assertEqual(log_file_name, 'LOG')
+        log_file_name = DBBenchRunner.get_info_log_file_name(None, "random_path")
+        self.assertEqual(log_file_name, "LOG")
 
         log_file_name = DBBenchRunner.get_info_log_file_name(
-            '/dev/shm/', '/tmp/rocksdbtest-155919/dbbench/'
+            "/dev/shm/", "/tmp/rocksdbtest-155919/dbbench/"
         )
-        self.assertEqual(log_file_name, 'tmp_rocksdbtest-155919_dbbench_LOG')
+        self.assertEqual(log_file_name, "tmp_rocksdbtest-155919_dbbench_LOG")
 
     def test_get_opt_args_str(self):
-        misc_opt_dict = {'bloom_bits': 2, 'empty_opt': None, 'rate_limiter': 3}
+        misc_opt_dict = {"bloom_bits": 2, "empty_opt": None, "rate_limiter": 3}
         optional_args_str = DBBenchRunner.get_opt_args_str(misc_opt_dict)
-        self.assertEqual(optional_args_str, ' --bloom_bits=2 --rate_limiter=3')
+        self.assertEqual(optional_args_str, " --bloom_bits=2 --rate_limiter=3")
 
     def test_get_log_options(self):
-        db_path = '/tmp/rocksdb-155919/dbbench'
+        db_path = "/tmp/rocksdb-155919/dbbench"
         # when db_log_dir is present in the db_options
         update_dict = {
-            'DBOptions.db_log_dir': {NO_COL_FAMILY: '/dev/shm'},
-            'DBOptions.stats_dump_period_sec': {NO_COL_FAMILY: '20'}
+            "DBOptions.db_log_dir": {NO_COL_FAMILY: "/dev/shm"},
+            "DBOptions.stats_dump_period_sec": {NO_COL_FAMILY: "20"},
         }
         self.db_options.update_options(update_dict)
         log_file_prefix, stats_freq = self.bench_runner.get_log_options(
             self.db_options, db_path
         )
-        self.assertEqual(
-            log_file_prefix, '/dev/shm/tmp_rocksdb-155919_dbbench_LOG'
-        )
+        self.assertEqual(log_file_prefix, "/dev/shm/tmp_rocksdb-155919_dbbench_LOG")
         self.assertEqual(stats_freq, 20)
 
         update_dict = {
-            'DBOptions.db_log_dir': {NO_COL_FAMILY: None},
-            'DBOptions.stats_dump_period_sec': {NO_COL_FAMILY: '30'}
+            "DBOptions.db_log_dir": {NO_COL_FAMILY: None},
+            "DBOptions.stats_dump_period_sec": {NO_COL_FAMILY: "30"},
         }
         self.db_options.update_options(update_dict)
         log_file_prefix, stats_freq = self.bench_runner.get_log_options(
             self.db_options, db_path
         )
-        self.assertEqual(log_file_prefix, '/tmp/rocksdb-155919/dbbench/LOG')
+        self.assertEqual(log_file_prefix, "/tmp/rocksdb-155919/dbbench/LOG")
         self.assertEqual(stats_freq, 30)
 
     def test_build_experiment_command(self):
         # add some misc_options to db_options
         update_dict = {
-            'bloom_bits': {NO_COL_FAMILY: 2},
-            'rate_limiter_bytes_per_sec': {NO_COL_FAMILY: 128000000}
+            "bloom_bits": {NO_COL_FAMILY: 2},
+            "rate_limiter_bytes_per_sec": {NO_COL_FAMILY: 128000000},
         }
         self.db_options.update_options(update_dict)
-        db_path = '/dev/shm'
+        db_path = "/dev/shm"
         experiment_command = self.bench_runner._build_experiment_command(
             self.db_options, db_path
         )
         opt_args_str = DBBenchRunner.get_opt_args_str(
             self.db_options.get_misc_options()
         )
-        opt_args_str += (
-            ' --options_file=' +
-            self.db_options.generate_options_config('12345')
+        opt_args_str += " --options_file=" + self.db_options.generate_options_config(
+            "12345"
         )
         for arg in self.pos_args[2:]:
-            opt_args_str += (' --' + arg)
+            opt_args_str += " --" + arg
         expected_command = (
-            self.pos_args[0] + ' --benchmarks=' + self.pos_args[1] +
-            ' --statistics --perf_level=3 --db=' + db_path + opt_args_str
+            self.pos_args[0]
+            + " --benchmarks="
+            + self.pos_args[1]
+            + " --statistics --perf_level=3 --db="
+            + db_path
+            + opt_args_str
         )
         self.assertEqual(experiment_command, expected_command)
 
@@ -104,44 +104,38 @@ class TestDBBenchRunner(unittest.TestCase):
     def setUp(self):
         # Note: the db_bench binary should be present in the rocksdb/ directory
         self.pos_args = [
-            './../../db_bench',
-            'overwrite',
-            'use_existing_db=true',
-            'duration=20'
+            "./../../db_bench",
+            "overwrite",
+            "use_existing_db=true",
+            "duration=20",
         ]
         self.bench_runner = DBBenchRunner(self.pos_args)
         this_path = os.path.abspath(os.path.dirname(__file__))
-        options_path = os.path.join(this_path, 'input_files/OPTIONS-000005')
+        options_path = os.path.join(this_path, "input_files/OPTIONS-000005")
         self.db_options = DatabaseOptions(options_path)
 
     def test_experiment_output(self):
-        update_dict = {'bloom_bits': {NO_COL_FAMILY: 2}}
+        update_dict = {"bloom_bits": {NO_COL_FAMILY: 2}}
         self.db_options.update_options(update_dict)
-        db_path = '/dev/shm'
+        db_path = "/dev/shm"
         data_sources, throughput = self.bench_runner.run_experiment(
             self.db_options, db_path
         )
         self.assertEqual(
-            data_sources[DataSource.Type.DB_OPTIONS][0].type,
-            DataSource.Type.DB_OPTIONS
-        )
-        self.assertEqual(
-            data_sources[DataSource.Type.LOG][0].type,
-            DataSource.Type.LOG
+            data_sources[DataSource.Type.DB_OPTIONS][0].type, DataSource.Type.DB_OPTIONS
         )
+        self.assertEqual(data_sources[DataSource.Type.LOG][0].type, DataSource.Type.LOG)
         self.assertEqual(len(data_sources[DataSource.Type.TIME_SERIES]), 2)
         self.assertEqual(
             data_sources[DataSource.Type.TIME_SERIES][0].type,
-            DataSource.Type.TIME_SERIES
+            DataSource.Type.TIME_SERIES,
         )
         self.assertEqual(
             data_sources[DataSource.Type.TIME_SERIES][1].type,
-            DataSource.Type.TIME_SERIES
-        )
-        self.assertEqual(
-            data_sources[DataSource.Type.TIME_SERIES][1].stats_freq_sec, 0
+            DataSource.Type.TIME_SERIES,
         )
+        self.assertEqual(data_sources[DataSource.Type.TIME_SERIES][1].stats_freq_sec, 0)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     unittest.main()

tools/advisor/test/test_db_log_parser.py

@@ -3,52 +3,49 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
-from advisor.db_log_parser import DatabaseLogs, Log, NO_COL_FAMILY
-from advisor.rule_parser import Condition, LogCondition
 import os
 import unittest
 
+from advisor.db_log_parser import DatabaseLogs, Log, NO_COL_FAMILY
+from advisor.rule_parser import Condition, LogCondition
+
 
 class TestLog(unittest.TestCase):
     def setUp(self):
-        self.column_families = ['default', 'col_fam_A']
+        self.column_families = ["default", "col_fam_A"]
 
     def test_get_column_family(self):
         test_log = (
-            "2018/05/25-14:34:21.047233 7f82ba72e700 [db/flush_job.cc:371] " +
-            "[col_fam_A] [JOB 44] Level-0 flush table #84: 1890780 bytes OK"
+            "2018/05/25-14:34:21.047233 7f82ba72e700 [db/flush_job.cc:371] "
+            + "[col_fam_A] [JOB 44] Level-0 flush table #84: 1890780 bytes OK"
         )
         db_log = Log(test_log, self.column_families)
-        self.assertEqual('col_fam_A', db_log.get_column_family())
+        self.assertEqual("col_fam_A", db_log.get_column_family())
 
         test_log = (
-            "2018/05/25-14:34:21.047233 7f82ba72e700 [db/flush_job.cc:371] " +
-            "[JOB 44] Level-0 flush table #84: 1890780 bytes OK"
+            "2018/05/25-14:34:21.047233 7f82ba72e700 [db/flush_job.cc:371] "
+            + "[JOB 44] Level-0 flush table #84: 1890780 bytes OK"
         )
         db_log = Log(test_log, self.column_families)
-        db_log.append_message('[default] some remaining part of log')
+        db_log.append_message("[default] some remaining part of log")
         self.assertEqual(NO_COL_FAMILY, db_log.get_column_family())
 
     def test_get_methods(self):
         hr_time = "2018/05/25-14:30:25.491635"
         context = "7f82ba72e700"
         message = (
-            "[db/flush_job.cc:331] [default] [JOB 10] Level-0 flush table " +
-            "#23: started"
+            "[db/flush_job.cc:331] [default] [JOB 10] Level-0 flush table "
+            + "#23: started"
         )
         test_log = hr_time + " " + context + " " + message
         db_log = Log(test_log, self.column_families)
         self.assertEqual(db_log.get_message(), message)
         remaining_message = "[col_fam_A] some more logs"
         db_log.append_message(remaining_message)
-        self.assertEqual(
-            db_log.get_human_readable_time(), "2018/05/25-14:30:25.491635"
-        )
+        self.assertEqual(db_log.get_human_readable_time(), "2018/05/25-14:30:25.491635")
         self.assertEqual(db_log.get_context(), "7f82ba72e700")
         self.assertEqual(db_log.get_timestamp(), 1527258625)
-        self.assertEqual(
-            db_log.get_message(), str(message + '\n' + remaining_message)
-        )
+        self.assertEqual(db_log.get_message(), str(message + "\n" + remaining_message))
 
     def test_is_new_log(self):
         new_log = "2018/05/25-14:34:21.047233 context random new log"
@@ -60,44 +57,40 @@ class TestLog(unittest.TestCase):
 class TestDatabaseLogs(unittest.TestCase):
     def test_check_and_trigger_conditions(self):
         this_path = os.path.abspath(os.path.dirname(__file__))
-        logs_path_prefix = os.path.join(this_path, 'input_files/LOG-0')
-        column_families = ['default', 'col-fam-A', 'col-fam-B']
+        logs_path_prefix = os.path.join(this_path, "input_files/LOG-0")
+        column_families = ["default", "col-fam-A", "col-fam-B"]
         db_logs = DatabaseLogs(logs_path_prefix, column_families)
         # matches, has 2 col_fams
-        condition1 = LogCondition.create(Condition('cond-A'))
-        condition1.set_parameter('regex', 'random log message')
+        condition1 = LogCondition.create(Condition("cond-A"))
+        condition1.set_parameter("regex", "random log message")
         # matches, multiple lines message
-        condition2 = LogCondition.create(Condition('cond-B'))
-        condition2.set_parameter('regex', 'continuing on next line')
+        condition2 = LogCondition.create(Condition("cond-B"))
+        condition2.set_parameter("regex", "continuing on next line")
         # does not match
-        condition3 = LogCondition.create(Condition('cond-C'))
-        condition3.set_parameter('regex', 'this should match no log')
-        db_logs.check_and_trigger_conditions(
-            [condition1, condition2, condition3]
-        )
+        condition3 = LogCondition.create(Condition("cond-C"))
+        condition3.set_parameter("regex", "this should match no log")
+        db_logs.check_and_trigger_conditions([condition1, condition2, condition3])
         cond1_trigger = condition1.get_trigger()
         self.assertEqual(2, len(cond1_trigger.keys()))
-        self.assertSetEqual(
-            {'col-fam-A', NO_COL_FAMILY}, set(cond1_trigger.keys())
-        )
-        self.assertEqual(2, len(cond1_trigger['col-fam-A']))
+        self.assertSetEqual({"col-fam-A", NO_COL_FAMILY}, set(cond1_trigger.keys()))
+        self.assertEqual(2, len(cond1_trigger["col-fam-A"]))
         messages = [
             "[db/db_impl.cc:563] [col-fam-A] random log message for testing",
-            "[db/db_impl.cc:653] [col-fam-A] another random log message"
+            "[db/db_impl.cc:653] [col-fam-A] another random log message",
         ]
-        self.assertIn(cond1_trigger['col-fam-A'][0].get_message(), messages)
-        self.assertIn(cond1_trigger['col-fam-A'][1].get_message(), messages)
+        self.assertIn(cond1_trigger["col-fam-A"][0].get_message(), messages)
+        self.assertIn(cond1_trigger["col-fam-A"][1].get_message(), messages)
         self.assertEqual(1, len(cond1_trigger[NO_COL_FAMILY]))
         self.assertEqual(
             cond1_trigger[NO_COL_FAMILY][0].get_message(),
-            "[db/db_impl.cc:331] [unknown] random log message no column family"
+            "[db/db_impl.cc:331] [unknown] random log message no column family",
         )
         cond2_trigger = condition2.get_trigger()
-        self.assertEqual(['col-fam-B'], list(cond2_trigger.keys()))
-        self.assertEqual(1, len(cond2_trigger['col-fam-B']))
+        self.assertEqual(["col-fam-B"], list(cond2_trigger.keys()))
+        self.assertEqual(1, len(cond2_trigger["col-fam-B"]))
         self.assertEqual(
-            cond2_trigger['col-fam-B'][0].get_message(),
-            "[db/db_impl.cc:234] [col-fam-B] log continuing on next line\n" +
-            "remaining part of the log"
+            cond2_trigger["col-fam-B"][0].get_message(),
+            "[db/db_impl.cc:234] [col-fam-B] log continuing on next line\n"
+            + "remaining part of the log",
         )
         self.assertIsNone(condition3.get_trigger())

tools/advisor/test/test_db_options_parser.py

@@ -3,105 +3,107 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
+import os
+import unittest
+
 from advisor.db_log_parser import NO_COL_FAMILY
 from advisor.db_options_parser import DatabaseOptions
 from advisor.rule_parser import Condition, OptionCondition
-import os
-import unittest
 
 
 class TestDatabaseOptions(unittest.TestCase):
     def setUp(self):
         self.this_path = os.path.abspath(os.path.dirname(__file__))
-        self.og_options = os.path.join(
-            self.this_path, 'input_files/OPTIONS-000005'
-        )
-        misc_options = [
-            'bloom_bits = 4', 'rate_limiter_bytes_per_sec = 1024000'
-        ]
+        self.og_options = os.path.join(self.this_path, "input_files/OPTIONS-000005")
+        misc_options = ["bloom_bits = 4", "rate_limiter_bytes_per_sec = 1024000"]
         # create the options object
         self.db_options = DatabaseOptions(self.og_options, misc_options)
         # perform clean-up before running tests
         self.generated_options = os.path.join(
-            self.this_path, '../temp/OPTIONS_testing.tmp'
+            self.this_path, "../temp/OPTIONS_testing.tmp"
         )
         if os.path.isfile(self.generated_options):
             os.remove(self.generated_options)
 
     def test_get_options_diff(self):
         old_opt = {
-            'DBOptions.stats_dump_freq_sec': {NO_COL_FAMILY: '20'},
-            'CFOptions.write_buffer_size': {
-                'default': '1024000',
-                'col_fam_A': '128000',
-                'col_fam_B': '128000000'
+            "DBOptions.stats_dump_freq_sec": {NO_COL_FAMILY: "20"},
+            "CFOptions.write_buffer_size": {
+                "default": "1024000",
+                "col_fam_A": "128000",
+                "col_fam_B": "128000000",
             },
-            'DBOptions.use_fsync': {NO_COL_FAMILY: 'true'},
-            'DBOptions.max_log_file_size': {NO_COL_FAMILY: '128000000'}
+            "DBOptions.use_fsync": {NO_COL_FAMILY: "true"},
+            "DBOptions.max_log_file_size": {NO_COL_FAMILY: "128000000"},
         }
         new_opt = {
-            'bloom_bits': {NO_COL_FAMILY: '4'},
-            'CFOptions.write_buffer_size': {
-                'default': '128000000',
-                'col_fam_A': '128000',
-                'col_fam_C': '128000000'
+            "bloom_bits": {NO_COL_FAMILY: "4"},
+            "CFOptions.write_buffer_size": {
+                "default": "128000000",
+                "col_fam_A": "128000",
+                "col_fam_C": "128000000",
             },
-            'DBOptions.use_fsync': {NO_COL_FAMILY: 'true'},
-            'DBOptions.max_log_file_size': {NO_COL_FAMILY: '0'}
+            "DBOptions.use_fsync": {NO_COL_FAMILY: "true"},
+            "DBOptions.max_log_file_size": {NO_COL_FAMILY: "0"},
         }
         diff = DatabaseOptions.get_options_diff(old_opt, new_opt)
 
         expected_diff = {
-            'DBOptions.stats_dump_freq_sec': {NO_COL_FAMILY: ('20', None)},
-            'bloom_bits': {NO_COL_FAMILY: (None, '4')},
-            'CFOptions.write_buffer_size': {
-                'default': ('1024000', '128000000'),
-                'col_fam_B': ('128000000', None),
-                'col_fam_C': (None, '128000000')
+            "DBOptions.stats_dump_freq_sec": {NO_COL_FAMILY: ("20", None)},
+            "bloom_bits": {NO_COL_FAMILY: (None, "4")},
+            "CFOptions.write_buffer_size": {
+                "default": ("1024000", "128000000"),
+                "col_fam_B": ("128000000", None),
+                "col_fam_C": (None, "128000000"),
             },
-            'DBOptions.max_log_file_size': {NO_COL_FAMILY: ('128000000', '0')}
+            "DBOptions.max_log_file_size": {NO_COL_FAMILY: ("128000000", "0")},
         }
         self.assertDictEqual(diff, expected_diff)
 
     def test_is_misc_option(self):
-        self.assertTrue(DatabaseOptions.is_misc_option('bloom_bits'))
+        self.assertTrue(DatabaseOptions.is_misc_option("bloom_bits"))
         self.assertFalse(
-            DatabaseOptions.is_misc_option('DBOptions.stats_dump_freq_sec')
+            DatabaseOptions.is_misc_option("DBOptions.stats_dump_freq_sec")
         )
 
     def test_set_up(self):
         options = self.db_options.get_all_options()
         self.assertEqual(22, len(options.keys()))
         expected_misc_options = {
-            'bloom_bits': '4', 'rate_limiter_bytes_per_sec': '1024000'
+            "bloom_bits": "4",
+            "rate_limiter_bytes_per_sec": "1024000",
         }
-        self.assertDictEqual(
-            expected_misc_options, self.db_options.get_misc_options()
-        )
+        self.assertDictEqual(expected_misc_options, self.db_options.get_misc_options())
         self.assertListEqual(
-            ['default', 'col_fam_A'], self.db_options.get_column_families()
+            ["default", "col_fam_A"], self.db_options.get_column_families()
         )
 
     def test_get_options(self):
         opt_to_get = [
-            'DBOptions.manual_wal_flush', 'DBOptions.db_write_buffer_size',
-            'bloom_bits', 'CFOptions.compaction_filter_factory',
-            'CFOptions.num_levels', 'rate_limiter_bytes_per_sec',
-            'TableOptions.BlockBasedTable.block_align', 'random_option'
+            "DBOptions.manual_wal_flush",
+            "DBOptions.db_write_buffer_size",
+            "bloom_bits",
+            "CFOptions.compaction_filter_factory",
+            "CFOptions.num_levels",
+            "rate_limiter_bytes_per_sec",
+            "TableOptions.BlockBasedTable.block_align",
+            "random_option",
         ]
         options = self.db_options.get_options(opt_to_get)
         expected_options = {
-            'DBOptions.manual_wal_flush': {NO_COL_FAMILY: 'false'},
-            'DBOptions.db_write_buffer_size': {NO_COL_FAMILY: '0'},
-            'bloom_bits': {NO_COL_FAMILY: '4'},
-            'CFOptions.compaction_filter_factory': {
-                'default': 'nullptr', 'col_fam_A': 'nullptr'
+            "DBOptions.manual_wal_flush": {NO_COL_FAMILY: "false"},
+            "DBOptions.db_write_buffer_size": {NO_COL_FAMILY: "0"},
+            "bloom_bits": {NO_COL_FAMILY: "4"},
+            "CFOptions.compaction_filter_factory": {
+                "default": "nullptr",
+                "col_fam_A": "nullptr",
+            },
+            "CFOptions.num_levels": {"default": "7", "col_fam_A": "5"},
+            "rate_limiter_bytes_per_sec": {NO_COL_FAMILY: "1024000"},
+            "TableOptions.BlockBasedTable.block_align": {
+                "default": "false",
+                "col_fam_A": "true",
             },
-            'CFOptions.num_levels': {'default': '7', 'col_fam_A': '5'},
-            'rate_limiter_bytes_per_sec': {NO_COL_FAMILY: '1024000'},
-            'TableOptions.BlockBasedTable.block_align': {
-                'default': 'false', 'col_fam_A': 'true'
-            }
         }
         self.assertDictEqual(expected_options, options)
 
@@ -109,108 +111,104 @@ class TestDatabaseOptions(unittest.TestCase):
         # add new, update old, set old
         # before updating
         expected_old_opts = {
-            'DBOptions.db_log_dir': {NO_COL_FAMILY: None},
-            'DBOptions.manual_wal_flush': {NO_COL_FAMILY: 'false'},
-            'bloom_bits': {NO_COL_FAMILY: '4'},
-            'CFOptions.num_levels': {'default': '7', 'col_fam_A': '5'},
-            'TableOptions.BlockBasedTable.block_restart_interval': {
-                'col_fam_A': '16'
-            }
+            "DBOptions.db_log_dir": {NO_COL_FAMILY: None},
+            "DBOptions.manual_wal_flush": {NO_COL_FAMILY: "false"},
+            "bloom_bits": {NO_COL_FAMILY: "4"},
+            "CFOptions.num_levels": {"default": "7", "col_fam_A": "5"},
+            "TableOptions.BlockBasedTable.block_restart_interval": {"col_fam_A": "16"},
         }
         get_opts = list(expected_old_opts.keys())
         options = self.db_options.get_options(get_opts)
         self.assertEqual(expected_old_opts, options)
         # after updating options
         update_opts = {
-            'DBOptions.db_log_dir': {NO_COL_FAMILY: '/dev/shm'},
-            'DBOptions.manual_wal_flush': {NO_COL_FAMILY: 'true'},
-            'bloom_bits': {NO_COL_FAMILY: '2'},
-            'CFOptions.num_levels': {'col_fam_A': '7'},
-            'TableOptions.BlockBasedTable.block_restart_interval': {
-                'default': '32'
-            },
-            'random_misc_option': {NO_COL_FAMILY: 'something'}
+            "DBOptions.db_log_dir": {NO_COL_FAMILY: "/dev/shm"},
+            "DBOptions.manual_wal_flush": {NO_COL_FAMILY: "true"},
+            "bloom_bits": {NO_COL_FAMILY: "2"},
+            "CFOptions.num_levels": {"col_fam_A": "7"},
+            "TableOptions.BlockBasedTable.block_restart_interval": {"default": "32"},
+            "random_misc_option": {NO_COL_FAMILY: "something"},
         }
         self.db_options.update_options(update_opts)
-        update_opts['CFOptions.num_levels']['default'] = '7'
-        update_opts['TableOptions.BlockBasedTable.block_restart_interval'] = {
-            'default': '32', 'col_fam_A': '16'
+        update_opts["CFOptions.num_levels"]["default"] = "7"
+        update_opts["TableOptions.BlockBasedTable.block_restart_interval"] = {
+            "default": "32",
+            "col_fam_A": "16",
         }
-        get_opts.append('random_misc_option')
+        get_opts.append("random_misc_option")
         options = self.db_options.get_options(get_opts)
         self.assertDictEqual(update_opts, options)
         expected_misc_options = {
-            'bloom_bits': '2',
-            'rate_limiter_bytes_per_sec': '1024000',
-            'random_misc_option': 'something'
+            "bloom_bits": "2",
+            "rate_limiter_bytes_per_sec": "1024000",
+            "random_misc_option": "something",
         }
-        self.assertDictEqual(
-            expected_misc_options, self.db_options.get_misc_options()
-        )
+        self.assertDictEqual(expected_misc_options, self.db_options.get_misc_options())
 
     def test_generate_options_config(self):
         # make sure file does not exist from before
         self.assertFalse(os.path.isfile(self.generated_options))
-        self.db_options.generate_options_config('testing')
+        self.db_options.generate_options_config("testing")
         self.assertTrue(os.path.isfile(self.generated_options))
 
     def test_check_and_trigger_conditions(self):
         # options only from CFOptions
         # setup the OptionCondition objects to check and trigger
         update_dict = {
-            'CFOptions.level0_file_num_compaction_trigger': {'col_fam_A': '4'},
-            'CFOptions.max_bytes_for_level_base': {'col_fam_A': '10'}
+            "CFOptions.level0_file_num_compaction_trigger": {"col_fam_A": "4"},
+            "CFOptions.max_bytes_for_level_base": {"col_fam_A": "10"},
         }
         self.db_options.update_options(update_dict)
-        cond1 = Condition('opt-cond-1')
+        cond1 = Condition("opt-cond-1")
         cond1 = OptionCondition.create(cond1)
         cond1.set_parameter(
-            'options', [
-                'CFOptions.level0_file_num_compaction_trigger',
-                'TableOptions.BlockBasedTable.block_restart_interval',
-                'CFOptions.max_bytes_for_level_base'
-            ]
+            "options",
+            [
+                "CFOptions.level0_file_num_compaction_trigger",
+                "TableOptions.BlockBasedTable.block_restart_interval",
+                "CFOptions.max_bytes_for_level_base",
+            ],
         )
         cond1.set_parameter(
-            'evaluate',
-            'int(options[0])*int(options[1])-int(options[2])>=0'
+            "evaluate", "int(options[0])*int(options[1])-int(options[2])>=0"
         )
         # only DBOptions
-        cond2 = Condition('opt-cond-2')
+        cond2 = Condition("opt-cond-2")
         cond2 = OptionCondition.create(cond2)
         cond2.set_parameter(
-            'options', [
-                'DBOptions.db_write_buffer_size',
-                'bloom_bits',
-                'rate_limiter_bytes_per_sec'
-            ]
+            "options",
+            [
+                "DBOptions.db_write_buffer_size",
+                "bloom_bits",
+                "rate_limiter_bytes_per_sec",
+            ],
         )
         cond2.set_parameter(
-            'evaluate',
-            '(int(options[2]) * int(options[1]) * int(options[0]))==0'
+            "evaluate", "(int(options[2]) * int(options[1]) * int(options[0]))==0"
         )
         # mix of CFOptions and DBOptions
-        cond3 = Condition('opt-cond-3')
+        cond3 = Condition("opt-cond-3")
         cond3 = OptionCondition.create(cond3)
         cond3.set_parameter(
-            'options', [
-                'DBOptions.db_write_buffer_size',  # 0
-                'CFOptions.num_levels',  # 5, 7
-                'bloom_bits'  # 4
-            ]
+            "options",
+            [
+                "DBOptions.db_write_buffer_size",  # 0
+                "CFOptions.num_levels",  # 5, 7
+                "bloom_bits",  # 4
+            ],
         )
         cond3.set_parameter(
-            'evaluate', 'int(options[2])*int(options[0])+int(options[1])>6'
+            "evaluate", "int(options[2])*int(options[0])+int(options[1])>6"
         )
         self.db_options.check_and_trigger_conditions([cond1, cond2, cond3])
 
-        cond1_trigger = {'col_fam_A': ['4', '16', '10']}
+        cond1_trigger = {"col_fam_A": ["4", "16", "10"]}
         self.assertDictEqual(cond1_trigger, cond1.get_trigger())
-        cond2_trigger = {NO_COL_FAMILY: ['0', '4', '1024000']}
+        cond2_trigger = {NO_COL_FAMILY: ["0", "4", "1024000"]}
         self.assertDictEqual(cond2_trigger, cond2.get_trigger())
-        cond3_trigger = {'default': ['0', '7', '4']}
+        cond3_trigger = {"default": ["0", "7", "4"]}
         self.assertDictEqual(cond3_trigger, cond3.get_trigger())
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     unittest.main()

tools/advisor/test/test_db_stats_fetcher.py

@@ -3,49 +3,46 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
-from advisor.db_stats_fetcher import LogStatsParser, DatabasePerfContext
-from advisor.db_timeseries_parser import NO_ENTITY
-from advisor.rule_parser import Condition, TimeSeriesCondition
 import os
 import time
 import unittest
 from unittest.mock import MagicMock
 
+from advisor.db_stats_fetcher import DatabasePerfContext, LogStatsParser
+from advisor.db_timeseries_parser import NO_ENTITY
+from advisor.rule_parser import Condition, TimeSeriesCondition
+
 
 class TestLogStatsParser(unittest.TestCase):
     def setUp(self):
         this_path = os.path.abspath(os.path.dirname(__file__))
-        stats_file = os.path.join(
-            this_path, 'input_files/log_stats_parser_keys_ts'
-        )
+        stats_file = os.path.join(this_path, "input_files/log_stats_parser_keys_ts")
         # populate the keys_ts dictionary of LogStatsParser
         self.stats_dict = {NO_ENTITY: {}}
-        with open(stats_file, 'r') as fp:
+        with open(stats_file, "r") as fp:
             for line in fp:
-                stat_name = line.split(':')[0].strip()
+                stat_name = line.split(":")[0].strip()
                 self.stats_dict[NO_ENTITY][stat_name] = {}
-                token_list = line.split(':')[1].strip().split(',')
+                token_list = line.split(":")[1].strip().split(",")
                 for token in token_list:
                     timestamp = int(token.split()[0])
                     value = float(token.split()[1])
                     self.stats_dict[NO_ENTITY][stat_name][timestamp] = value
-        self.log_stats_parser = LogStatsParser('dummy_log_file', 20)
+        self.log_stats_parser = LogStatsParser("dummy_log_file", 20)
         self.log_stats_parser.keys_ts = self.stats_dict
 
     def test_check_and_trigger_conditions_bursty(self):
         # mock fetch_timeseries() because 'keys_ts' has been pre-populated
         self.log_stats_parser.fetch_timeseries = MagicMock()
         # condition: bursty
-        cond1 = Condition('cond-1')
+        cond1 = Condition("cond-1")
         cond1 = TimeSeriesCondition.create(cond1)
-        cond1.set_parameter('keys', 'rocksdb.db.get.micros.p50')
-        cond1.set_parameter('behavior', 'bursty')
-        cond1.set_parameter('window_sec', 40)
-        cond1.set_parameter('rate_threshold', 0)
+        cond1.set_parameter("keys", "rocksdb.db.get.micros.p50")
+        cond1.set_parameter("behavior", "bursty")
+        cond1.set_parameter("window_sec", 40)
+        cond1.set_parameter("rate_threshold", 0)
         self.log_stats_parser.check_and_trigger_conditions([cond1])
-        expected_cond_trigger = {
-            NO_ENTITY: {1530896440: 0.9767546362322214}
-        }
+        expected_cond_trigger = {NO_ENTITY: {1530896440: 0.9767546362322214}}
         self.assertDictEqual(expected_cond_trigger, cond1.get_trigger())
         # ensure that fetch_timeseries() was called once
         self.log_stats_parser.fetch_timeseries.assert_called_once()
@@ -54,23 +51,20 @@ class TestLogStatsParser(unittest.TestCase):
         # mock fetch_timeseries() because 'keys_ts' has been pre-populated
         self.log_stats_parser.fetch_timeseries = MagicMock()
         # condition: evaluate_expression
-        cond1 = Condition('cond-1')
+        cond1 = Condition("cond-1")
         cond1 = TimeSeriesCondition.create(cond1)
-        cond1.set_parameter('keys', 'rocksdb.db.get.micros.p50')
-        cond1.set_parameter('behavior', 'evaluate_expression')
-        keys = [
-            'rocksdb.manifest.file.sync.micros.p99',
-            'rocksdb.db.get.micros.p50'
-        ]
-        cond1.set_parameter('keys', keys)
-        cond1.set_parameter('aggregation_op', 'latest')
+        cond1.set_parameter("keys", "rocksdb.db.get.micros.p50")
+        cond1.set_parameter("behavior", "evaluate_expression")
+        keys = ["rocksdb.manifest.file.sync.micros.p99", "rocksdb.db.get.micros.p50"]
+        cond1.set_parameter("keys", keys)
+        cond1.set_parameter("aggregation_op", "latest")
         # condition evaluates to FALSE
-        cond1.set_parameter('evaluate', 'keys[0]-(keys[1]*100)>200')
+        cond1.set_parameter("evaluate", "keys[0]-(keys[1]*100)>200")
         self.log_stats_parser.check_and_trigger_conditions([cond1])
         expected_cond_trigger = {NO_ENTITY: [1792.0, 15.9638]}
         self.assertIsNone(cond1.get_trigger())
         # condition evaluates to TRUE
-        cond1.set_parameter('evaluate', 'keys[0]-(keys[1]*100)<200')
+        cond1.set_parameter("evaluate", "keys[0]-(keys[1]*100)<200")
         self.log_stats_parser.check_and_trigger_conditions([cond1])
         expected_cond_trigger = {NO_ENTITY: [1792.0, 15.9638]}
         self.assertDictEqual(expected_cond_trigger, cond1.get_trigger())
@@ -81,23 +75,22 @@ class TestLogStatsParser(unittest.TestCase):
         # mock fetch_timeseries() because 'keys_ts' has been pre-populated
         self.log_stats_parser.fetch_timeseries = MagicMock()
         # condition: evaluate_expression
-        cond1 = Condition('cond-1')
+        cond1 = Condition("cond-1")
         cond1 = TimeSeriesCondition.create(cond1)
-        cond1.set_parameter('keys', 'rocksdb.db.get.micros.p50')
-        cond1.set_parameter('behavior', 'evaluate_expression')
-        keys = [
-            'rocksdb.manifest.file.sync.micros.p99',
-            'rocksdb.db.get.micros.p50'
-        ]
-        cond1.set_parameter('keys', keys)
-        cond1.set_parameter('evaluate', 'keys[0]-(keys[1]*100)>500')
+        cond1.set_parameter("keys", "rocksdb.db.get.micros.p50")
+        cond1.set_parameter("behavior", "evaluate_expression")
+        keys = ["rocksdb.manifest.file.sync.micros.p99", "rocksdb.db.get.micros.p50"]
+        cond1.set_parameter("keys", keys)
+        cond1.set_parameter("evaluate", "keys[0]-(keys[1]*100)>500")
         self.log_stats_parser.check_and_trigger_conditions([cond1])
-        expected_trigger = {NO_ENTITY: {
-            1530896414: [9938.0, 16.31508],
-            1530896440: [9938.0, 16.346602],
-            1530896466: [9938.0, 16.284669],
-            1530896492: [9938.0, 16.16005]
-        }}
+        expected_trigger = {
+            NO_ENTITY: {
+                1530896414: [9938.0, 16.31508],
+                1530896440: [9938.0, 16.346602],
+                1530896466: [9938.0, 16.284669],
+                1530896492: [9938.0, 16.16005],
+            }
+        }
         self.assertDictEqual(expected_trigger, cond1.get_trigger())
         self.log_stats_parser.fetch_timeseries.assert_called_once()
 
@@ -114,13 +107,15 @@ class TestDatabasePerfContext(unittest.TestCase):
             perf_ts[key] = {}
             start_val = perf_dict[key]
             for ix in range(5):
-                perf_ts[key][timestamp+(ix*10)] = start_val + (2 * ix * ix)
+                perf_ts[key][timestamp + (ix * 10)] = start_val + (2 * ix * ix)
         db_perf_context = DatabasePerfContext(perf_ts, 10, True)
-        timestamps = [timestamp+(ix*10) for ix in range(1, 5, 1)]
+        timestamps = [timestamp + (ix * 10) for ix in range(1, 5, 1)]
         values = [val for val in range(2, 15, 4)]
         inner_dict = {timestamps[ix]: values[ix] for ix in range(4)}
-        expected_keys_ts = {NO_ENTITY: {
-            'user_key_comparison_count': inner_dict,
-            'block_cache_hit_count': inner_dict
-        }}
+        expected_keys_ts = {
+            NO_ENTITY: {
+                "user_key_comparison_count": inner_dict,
+                "block_cache_hit_count": inner_dict,
+            }
+        }
         self.assertDictEqual(expected_keys_ts, db_perf_context.keys_ts)

tools/advisor/test/test_rule_parser.py

@@ -5,36 +5,32 @@
 
 import os
 import unittest
-from advisor.rule_parser import RulesSpec
+
 from advisor.db_log_parser import DatabaseLogs, DataSource
 from advisor.db_options_parser import DatabaseOptions
+from advisor.rule_parser import RulesSpec
 
 RuleToSuggestions = {
-    "stall-too-many-memtables": [
-        'inc-bg-flush',
-        'inc-write-buffer'
-    ],
+    "stall-too-many-memtables": ["inc-bg-flush", "inc-write-buffer"],
     "stall-too-many-L0": [
-        'inc-max-subcompactions',
-        'inc-max-bg-compactions',
-        'inc-write-buffer-size',
-        'dec-max-bytes-for-level-base',
-        'inc-l0-slowdown-writes-trigger'
+        "inc-max-subcompactions",
+        "inc-max-bg-compactions",
+        "inc-write-buffer-size",
+        "dec-max-bytes-for-level-base",
+        "inc-l0-slowdown-writes-trigger",
     ],
     "stop-too-many-L0": [
-        'inc-max-bg-compactions',
-        'inc-write-buffer-size',
-        'inc-l0-stop-writes-trigger'
+        "inc-max-bg-compactions",
+        "inc-write-buffer-size",
+        "inc-l0-stop-writes-trigger",
     ],
     "stall-too-many-compaction-bytes": [
-        'inc-max-bg-compactions',
-        'inc-write-buffer-size',
-        'inc-hard-pending-compaction-bytes-limit',
-        'inc-soft-pending-compaction-bytes-limit'
+        "inc-max-bg-compactions",
+        "inc-write-buffer-size",
+        "inc-hard-pending-compaction-bytes-limit",
+        "inc-soft-pending-compaction-bytes-limit",
     ],
-    "level0-level1-ratio": [
-        'l0-l1-ratio-health-check'
-    ]
+    "level0-level1-ratio": ["l0-l1-ratio-health-check"],
 }
 
 
@@ -42,19 +38,19 @@ class TestAllRulesTriggered(unittest.TestCase):
     def setUp(self):
         # load the Rules
         this_path = os.path.abspath(os.path.dirname(__file__))
-        ini_path = os.path.join(this_path, 'input_files/triggered_rules.ini')
+        ini_path = os.path.join(this_path, "input_files/triggered_rules.ini")
         self.db_rules = RulesSpec(ini_path)
         self.db_rules.load_rules_from_spec()
         self.db_rules.perform_section_checks()
         # load the data sources: LOG and OPTIONS
-        log_path = os.path.join(this_path, 'input_files/LOG-0')
-        options_path = os.path.join(this_path, 'input_files/OPTIONS-000005')
+        log_path = os.path.join(this_path, "input_files/LOG-0")
+        options_path = os.path.join(this_path, "input_files/OPTIONS-000005")
         db_options_parser = DatabaseOptions(options_path)
         self.column_families = db_options_parser.get_column_families()
         db_logs_parser = DatabaseLogs(log_path, self.column_families)
         self.data_sources = {
             DataSource.Type.DB_OPTIONS: [db_options_parser],
-            DataSource.Type.LOG: [db_logs_parser]
+            DataSource.Type.LOG: [db_logs_parser],
         }
 
     def test_triggered_conditions(self):
@@ -65,8 +61,7 @@ class TestAllRulesTriggered(unittest.TestCase):
             self.assertFalse(cond.is_triggered(), repr(cond))
         for rule in rules_dict.values():
             self.assertFalse(
-                rule.is_triggered(conditions_dict, self.column_families),
-                repr(rule)
+                rule.is_triggered(conditions_dict, self.column_families), repr(rule)
             )
 
         # # Trigger the conditions as per the data sources.
@@ -99,19 +94,19 @@ class TestConditionsConjunctions(unittest.TestCase):
     def setUp(self):
         # load the Rules
         this_path = os.path.abspath(os.path.dirname(__file__))
-        ini_path = os.path.join(this_path, 'input_files/test_rules.ini')
+        ini_path = os.path.join(this_path, "input_files/test_rules.ini")
         self.db_rules = RulesSpec(ini_path)
         self.db_rules.load_rules_from_spec()
         self.db_rules.perform_section_checks()
         # load the data sources: LOG and OPTIONS
-        log_path = os.path.join(this_path, 'input_files/LOG-1')
-        options_path = os.path.join(this_path, 'input_files/OPTIONS-000005')
+        log_path = os.path.join(this_path, "input_files/LOG-1")
+        options_path = os.path.join(this_path, "input_files/OPTIONS-000005")
         db_options_parser = DatabaseOptions(options_path)
         self.column_families = db_options_parser.get_column_families()
         db_logs_parser = DatabaseLogs(log_path, self.column_families)
         self.data_sources = {
             DataSource.Type.DB_OPTIONS: [db_options_parser],
-            DataSource.Type.LOG: [db_logs_parser]
+            DataSource.Type.LOG: [db_logs_parser],
         }
 
     def test_condition_conjunctions(self):
@@ -122,46 +117,43 @@ class TestConditionsConjunctions(unittest.TestCase):
             self.assertFalse(cond.is_triggered(), repr(cond))
         for rule in rules_dict.values():
             self.assertFalse(
-                rule.is_triggered(conditions_dict, self.column_families),
-                repr(rule)
+                rule.is_triggered(conditions_dict, self.column_families), repr(rule)
             )
 
         # Trigger the conditions as per the data sources.
         self.db_rules.trigger_conditions(self.data_sources)
 
         # Check for the conditions
-        conds_triggered = ['log-1-true', 'log-2-true', 'log-3-true']
-        conds_not_triggered = ['log-4-false', 'options-1-false']
+        conds_triggered = ["log-1-true", "log-2-true", "log-3-true"]
+        conds_not_triggered = ["log-4-false", "options-1-false"]
         for cond in conds_triggered:
             self.assertTrue(conditions_dict[cond].is_triggered(), repr(cond))
         for cond in conds_not_triggered:
             self.assertFalse(conditions_dict[cond].is_triggered(), repr(cond))
 
         # Check for the rules
-        rules_triggered = ['multiple-conds-true']
+        rules_triggered = ["multiple-conds-true"]
         rules_not_triggered = [
-            'single-condition-false',
-            'multiple-conds-one-false',
-            'multiple-conds-all-false'
+            "single-condition-false",
+            "multiple-conds-one-false",
+            "multiple-conds-all-false",
         ]
         for rule_name in rules_triggered:
             rule = rules_dict[rule_name]
             self.assertTrue(
-                rule.is_triggered(conditions_dict, self.column_families),
-                repr(rule)
+                rule.is_triggered(conditions_dict, self.column_families), repr(rule)
             )
         for rule_name in rules_not_triggered:
             rule = rules_dict[rule_name]
             self.assertFalse(
-                rule.is_triggered(conditions_dict, self.column_families),
-                repr(rule)
+                rule.is_triggered(conditions_dict, self.column_families), repr(rule)
             )
 
 
 class TestSanityChecker(unittest.TestCase):
     def setUp(self):
         this_path = os.path.abspath(os.path.dirname(__file__))
-        ini_path = os.path.join(this_path, 'input_files/rules_err1.ini')
+        ini_path = os.path.join(this_path, "input_files/rules_err1.ini")
         db_rules = RulesSpec(ini_path)
         db_rules.load_rules_from_spec()
         self.rules_dict = db_rules.get_rules_dict()
@@ -169,39 +161,39 @@ class TestSanityChecker(unittest.TestCase):
         self.suggestions_dict = db_rules.get_suggestions_dict()
 
     def test_rule_missing_suggestions(self):
-        regex = '.*rule must have at least one suggestion.*'
+        regex = ".*rule must have at least one suggestion.*"
         with self.assertRaisesRegex(ValueError, regex):
-            self.rules_dict['missing-suggestions'].perform_checks()
+            self.rules_dict["missing-suggestions"].perform_checks()
 
     def test_rule_missing_conditions(self):
-        regex = '.*rule must have at least one condition.*'
+        regex = ".*rule must have at least one condition.*"
         with self.assertRaisesRegex(ValueError, regex):
-            self.rules_dict['missing-conditions'].perform_checks()
+            self.rules_dict["missing-conditions"].perform_checks()
 
     def test_condition_missing_regex(self):
-        regex = '.*provide regex for log condition.*'
+        regex = ".*provide regex for log condition.*"
         with self.assertRaisesRegex(ValueError, regex):
-            self.conditions_dict['missing-regex'].perform_checks()
+            self.conditions_dict["missing-regex"].perform_checks()
 
     def test_condition_missing_options(self):
-        regex = '.*options missing in condition.*'
+        regex = ".*options missing in condition.*"
         with self.assertRaisesRegex(ValueError, regex):
-            self.conditions_dict['missing-options'].perform_checks()
+            self.conditions_dict["missing-options"].perform_checks()
 
     def test_condition_missing_expression(self):
-        regex = '.*expression missing in condition.*'
+        regex = ".*expression missing in condition.*"
         with self.assertRaisesRegex(ValueError, regex):
-            self.conditions_dict['missing-expression'].perform_checks()
+            self.conditions_dict["missing-expression"].perform_checks()
 
     def test_suggestion_missing_option(self):
-        regex = '.*provide option or description.*'
+        regex = ".*provide option or description.*"
         with self.assertRaisesRegex(ValueError, regex):
-            self.suggestions_dict['missing-option'].perform_checks()
+            self.suggestions_dict["missing-option"].perform_checks()
 
     def test_suggestion_missing_description(self):
-        regex = '.*provide option or description.*'
+        regex = ".*provide option or description.*"
         with self.assertRaisesRegex(ValueError, regex):
-            self.suggestions_dict['missing-description'].perform_checks()
+            self.suggestions_dict["missing-description"].perform_checks()
 
 
 class TestParsingErrors(unittest.TestCase):
@@ -209,26 +201,26 @@ class TestParsingErrors(unittest.TestCase):
         self.this_path = os.path.abspath(os.path.dirname(__file__))
 
     def test_condition_missing_source(self):
-        ini_path = os.path.join(self.this_path, 'input_files/rules_err2.ini')
+        ini_path = os.path.join(self.this_path, "input_files/rules_err2.ini")
         db_rules = RulesSpec(ini_path)
-        regex = '.*provide source for condition.*'
+        regex = ".*provide source for condition.*"
         with self.assertRaisesRegex(NotImplementedError, regex):
             db_rules.load_rules_from_spec()
 
     def test_suggestion_missing_action(self):
-        ini_path = os.path.join(self.this_path, 'input_files/rules_err3.ini')
+        ini_path = os.path.join(self.this_path, "input_files/rules_err3.ini")
         db_rules = RulesSpec(ini_path)
-        regex = '.*provide action for option.*'
+        regex = ".*provide action for option.*"
         with self.assertRaisesRegex(ValueError, regex):
             db_rules.load_rules_from_spec()
 
     def test_section_no_name(self):
-        ini_path = os.path.join(self.this_path, 'input_files/rules_err4.ini')
+        ini_path = os.path.join(self.this_path, "input_files/rules_err4.ini")
         db_rules = RulesSpec(ini_path)
-        regex = 'Parsing error: needed section header:.*'
+        regex = "Parsing error: needed section header:.*"
         with self.assertRaisesRegex(ValueError, regex):
             db_rules.load_rules_from_spec()
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     unittest.main()

tools/benchmark_ci.py

@@ -4,57 +4,59 @@
 #  COPYING file in the root directory) and Apache 2.0 License
 #  (found in the LICENSE.Apache file in the root directory).
 
-'''Run benchmark_compare.sh on the most recent build, for CI
-'''
+"""Run benchmark_compare.sh on the most recent build, for CI
+"""
 
 import argparse
 import glob
+import logging
 import os
 import re
 import shutil
 import subprocess
 import sys
-import logging
 
 logging.basicConfig(level=logging.INFO)
 
 
 class Config:
     def __init__(self, args):
-        self.version_file = './include/rocksdb/version.h'
+        self.version_file = "./include/rocksdb/version.h"
         self.data_dir = os.path.expanduser(f"{args.db_dir}")
         self.results_dir = os.path.expanduser(f"{args.output_dir}")
         self.benchmark_script = f"{os.getcwd()}/tools/benchmark_compare.sh"
         self.benchmark_cwd = f"{os.getcwd()}/tools"
 
-    benchmark_env_keys = ['LD_LIBRARY_PATH',
-                          'NUM_KEYS',
-                          'KEY_SIZE',
-                          'VALUE_SIZE',
-                          'CACHE_SIZE_MB',
-                          'DURATION_RW',
-                          'DURATION_RO',
-                          'MB_WRITE_PER_SEC',
-                          'NUM_THREADS',
-                          'COMPRESSION_TYPE',
-                          'MIN_LEVEL_TO_COMPRESS',
-                          'WRITE_BUFFER_SIZE_MB',
-                          'TARGET_FILE_SIZE_BASE_MB',
-                          'MAX_BYTES_FOR_LEVEL_BASE_MB',
-                          'MAX_BACKGROUND_JOBS',
-                          'CACHE_INDEX_AND_FILTER_BLOCKS',
-                          'USE_O_DIRECT',
-                          'STATS_INTERVAL_SECONDS',
-                          'SUBCOMPACTIONS',
-                          'COMPACTION_STYLE',
-                          'CI_TESTS_ONLY']
+    benchmark_env_keys = [
+        "LD_LIBRARY_PATH",
+        "NUM_KEYS",
+        "KEY_SIZE",
+        "VALUE_SIZE",
+        "CACHE_SIZE_MB",
+        "DURATION_RW",
+        "DURATION_RO",
+        "MB_WRITE_PER_SEC",
+        "NUM_THREADS",
+        "COMPRESSION_TYPE",
+        "MIN_LEVEL_TO_COMPRESS",
+        "WRITE_BUFFER_SIZE_MB",
+        "TARGET_FILE_SIZE_BASE_MB",
+        "MAX_BYTES_FOR_LEVEL_BASE_MB",
+        "MAX_BACKGROUND_JOBS",
+        "CACHE_INDEX_AND_FILTER_BLOCKS",
+        "USE_O_DIRECT",
+        "STATS_INTERVAL_SECONDS",
+        "SUBCOMPACTIONS",
+        "COMPACTION_STYLE",
+        "CI_TESTS_ONLY",
+    ]
 
 
 def read_version(config):
-    majorRegex = re.compile(r'#define ROCKSDB_MAJOR\s([0-9]+)')
-    minorRegex = re.compile(r'#define ROCKSDB_MINOR\s([0-9]+)')
-    patchRegex = re.compile(r'#define ROCKSDB_PATCH\s([0-9]+)')
-    with open(config.version_file, 'r') as reader:
+    majorRegex = re.compile(r"#define ROCKSDB_MAJOR\s([0-9]+)")
+    minorRegex = re.compile(r"#define ROCKSDB_MINOR\s([0-9]+)")
+    patchRegex = re.compile(r"#define ROCKSDB_PATCH\s([0-9]+)")
+    with open(config.version_file, "r") as reader:
         major = None
         minor = None
         patch = None
@@ -77,8 +79,7 @@ def read_version(config):
 
 
 def prepare(version_str, config):
-    old_files = glob.glob(f"{config.results_dir}/{version_str}/**",
-                          recursive=True)
+    old_files = glob.glob(f"{config.results_dir}/{version_str}/**", recursive=True)
     for f in old_files:
         if os.path.isfile(f):
             logging.debug(f"remove file {f}")
@@ -96,8 +97,10 @@ def prepare(version_str, config):
 
 def results(version_str, config):
     # Copy the report TSV file back to the top level of results
-    shutil.copyfile(f"{config.results_dir}/{version_str}/report.tsv",
-                    f"{config.results_dir}/report.tsv")
+    shutil.copyfile(
+        f"{config.results_dir}/{version_str}/report.tsv",
+        f"{config.results_dir}/report.tsv",
+    )
 
 
 def cleanup(version_str, config):
@@ -116,32 +119,41 @@ def get_benchmark_env():
 
 
 def main():
-    '''Tool for running benchmark_compare.sh on the most recent build, for CI
+    """Tool for running benchmark_compare.sh on the most recent build, for CI
     This tool will
 
     (1) Work out the current version of RocksDB
     (2) Run benchmark_compare with that version alone
-    '''
+    """
 
     parser = argparse.ArgumentParser(
-        description='benchmark_compare.sh Python wrapper for CI.')
+        description="benchmark_compare.sh Python wrapper for CI."
+    )
 
     # --tsvfile is the name of the file to read results from
     # --esdocument is the ElasticSearch document to push these results into
     #
-    parser.add_argument('--db_dir', default='~/tmp/rocksdb-benchmark-datadir',
-                        help='Database directory hierarchy to use')
-    parser.add_argument('--output_dir', default='~/tmp/benchmark-results',
-                        help='Benchmark output goes here')
-    parser.add_argument('--num_keys', default='10000',
-                        help='Number of database keys to use in benchmark test(s) (determines size of test job)')
+    parser.add_argument(
+        "--db_dir",
+        default="~/tmp/rocksdb-benchmark-datadir",
+        help="Database directory hierarchy to use",
+    )
+    parser.add_argument(
+        "--output_dir",
+        default="~/tmp/benchmark-results",
+        help="Benchmark output goes here",
+    )
+    parser.add_argument(
+        "--num_keys",
+        default="10000",
+        help="Number of database keys to use in benchmark test(s) (determines size of test job)",
+    )
     args = parser.parse_args()
     config = Config(args)
 
     version = read_version(config)
     if version is None:
-        raise Exception(
-            f"Could not read RocksDB version from {config.version_file}")
+        raise Exception(f"Could not read RocksDB version from {config.version_file}")
     version_str = f"{version[0]}.{version[1]}.{version[2]}"
     logging.info(f"Run benchmark_ci with RocksDB version {version_str}")
 
@@ -149,9 +161,13 @@ def main():
 
     try:
         env = get_benchmark_env()
-        env.append(('NUM_KEYS', args.num_keys))
-        cmd = [config.benchmark_script,
-               config.data_dir, config.results_dir, version_str]
+        env.append(("NUM_KEYS", args.num_keys))
+        cmd = [
+            config.benchmark_script,
+            config.data_dir,
+            config.results_dir,
+            version_str,
+        ]
         logging.info(f"Run {cmd} env={env} cwd={config.benchmark_cwd}")
         subprocess.run(cmd, env=dict(env), cwd=config.benchmark_cwd)
 
@@ -162,5 +178,5 @@ def main():
     return 0
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     sys.exit(main())

tools/block_cache_analyzer/block_cache_pysim_test.py

@@ -8,9 +8,12 @@ import sys
 from block_cache_pysim import (
     ARCCache,
     CacheEntry,
+    create_cache,
     GDSizeCache,
     HashTable,
     HyperbolicPolicy,
+    kMicrosInSecond,
+    kSampleSize,
     LFUPolicy,
     LinUCBCache,
     LRUCache,
@@ -18,13 +21,10 @@ from block_cache_pysim import (
     MRUPolicy,
     OPTCache,
     OPTCacheEntry,
+    run,
     ThompsonSamplingCache,
     TraceCache,
     TraceRecord,
-    create_cache,
-    kMicrosInSecond,
-    kSampleSize,
-    run,
 )
 
 

tools/block_cache_analyzer/block_cache_trace_analyzer_plot.py

@@ -13,6 +13,7 @@ import random
 import sys
 
 import matplotlib
+
 matplotlib.use("Agg")
 import matplotlib.backends.backend_pdf
 import matplotlib.pyplot as plt

tools/check_all_python.py

@@ -15,8 +15,8 @@ for base in ["buckifier", "build_tools", "coverage", "tools"]:
         filenames += glob.glob(base + "/" + suff + ".py")
 
 for filename in filenames:
-    source = open(filename, 'r').read() + '\n'
+    source = open(filename, "r").read() + "\n"
     # Parses and syntax checks the file, throwing on error. (No pyc written.)
-    _ = compile(source, filename, 'exec')
+    _ = compile(source, filename, "exec")
 
 print("No syntax errors in {0} .py files".format(len(filenames)))

tools/db_crashtest.py

@@ -2,14 +2,15 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 from __future__ import absolute_import, division, print_function, unicode_literals
 
+import argparse
+
 import os
-import sys
-import time
 import random
-import tempfile
-import subprocess
 import shutil
-import argparse
+import subprocess
+import sys
+import tempfile
+import time
 
 # params overwrite priority:
 #   for default:
@@ -37,8 +38,9 @@ default_params = {
     "batch_protection_bytes_per_key": lambda: random.choice([0, 8]),
     "memtable_protection_bytes_per_key": lambda: random.choice([0, 1, 2, 4, 8]),
     "block_size": 16384,
-    "bloom_bits": lambda: random.choice([random.randint(0,19),
-                                         random.lognormvariate(2.3, 1.3)]),
+    "bloom_bits": lambda: random.choice(
+        [random.randint(0, 19), random.lognormvariate(2.3, 1.3)]
+    ),
     "cache_index_and_filter_blocks": lambda: random.randint(0, 1),
     "cache_size": 8388608,
     "charge_compression_dictionary_building_buffer": lambda: random.choice([0, 1]),
@@ -47,12 +49,14 @@ default_params = {
     "charge_file_metadata": lambda: random.choice([0, 1]),
     "checkpoint_one_in": 1000000,
     "compression_type": lambda: random.choice(
-        ["none", "snappy", "zlib", "lz4", "lz4hc", "xpress", "zstd"]),
-    "bottommost_compression_type": lambda:
-        "disable" if random.randint(0, 1) == 0 else
-        random.choice(
-            ["none", "snappy", "zlib", "lz4", "lz4hc", "xpress", "zstd"]),
-    "checksum_type" : lambda: random.choice(["kCRC32c", "kxxHash", "kxxHash64", "kXXH3"]),
+        ["none", "snappy", "zlib", "lz4", "lz4hc", "xpress", "zstd"]
+    ),
+    "bottommost_compression_type": lambda: "disable"
+    if random.randint(0, 1) == 0
+    else random.choice(["none", "snappy", "zlib", "lz4", "lz4hc", "xpress", "zstd"]),
+    "checksum_type": lambda: random.choice(
+        ["kCRC32c", "kxxHash", "kxxHash64", "kXXH3"]
+    ),
     "compression_max_dict_bytes": lambda: 16384 * random.randint(0, 1),
     "compression_zstd_max_train_bytes": lambda: 65536 * random.randint(0, 1),
     # Disabled compression_parallel_threads as the feature is not stable
@@ -93,12 +97,12 @@ default_params = {
     # the random seed, so the same keys are chosen by every run for disallowing
     # overwrites.
     "nooverwritepercent": 1,
-    "open_files": lambda : random.choice([-1, -1, 100, 500000]),
+    "open_files": lambda: random.choice([-1, -1, 100, 500000]),
     "optimize_filters_for_memory": lambda: random.randint(0, 1),
     "partition_filters": lambda: random.randint(0, 1),
     "partition_pinning": lambda: random.randint(0, 3),
     "pause_background_one_in": 1000000,
-    "prefix_size" : lambda: random.choice([-1, 1, 5, 7, 8]),
+    "prefix_size": lambda: random.choice([-1, 1, 5, 7, 8]),
     "prefixpercent": 5,
     "progress_reports": 0,
     "readpercent": 45,
@@ -117,7 +121,7 @@ default_params = {
     "use_direct_io_for_flush_and_compaction": lambda: random.randint(0, 1),
     "mock_direct_io": False,
     "cache_type": lambda: random.choice(["lru_cache", "hyper_clock_cache"]),
-        # fast_lru_cache is incompatible with stress tests, because it doesn't support strict_capacity_limit == false.
+    # fast_lru_cache is incompatible with stress tests, because it doesn't support strict_capacity_limit == false.
     "use_full_merge_v1": lambda: random.randint(0, 1),
     "use_merge": lambda: random.randint(0, 1),
     # 999 -> use Bloom API
@@ -128,34 +132,36 @@ default_params = {
     "writepercent": 35,
     "format_version": lambda: random.choice([2, 3, 4, 5, 5]),
     "index_block_restart_interval": lambda: random.choice(range(1, 16)),
-    "use_multiget" : lambda: random.randint(0, 1),
-    "periodic_compaction_seconds" :
-        lambda: random.choice([0, 0, 1, 2, 10, 100, 1000]),
-    "compaction_ttl" : lambda: random.choice([0, 0, 1, 2, 10, 100, 1000]),
+    "use_multiget": lambda: random.randint(0, 1),
+    "periodic_compaction_seconds": lambda: random.choice([0, 0, 1, 2, 10, 100, 1000]),
+    "compaction_ttl": lambda: random.choice([0, 0, 1, 2, 10, 100, 1000]),
     # Test small max_manifest_file_size in a smaller chance, as most of the
     # time we wnat manifest history to be preserved to help debug
-    "max_manifest_file_size" : lambda : random.choice(
-        [t * 16384 if t < 3 else 1024 * 1024 * 1024 for t in range(1, 30)]),
+    "max_manifest_file_size": lambda: random.choice(
+        [t * 16384 if t < 3 else 1024 * 1024 * 1024 for t in range(1, 30)]
+    ),
     # Sync mode might make test runs slower so running it in a smaller chance
-    "sync" : lambda : random.choice(
-        [1 if t == 0 else 0 for t in range(0, 20)]),
+    "sync": lambda: random.choice([1 if t == 0 else 0 for t in range(0, 20)]),
     "bytes_per_sync": lambda: random.choice([0, 262144]),
     "wal_bytes_per_sync": lambda: random.choice([0, 524288]),
     # Disable compaction_readahead_size because the test is not passing.
-    #"compaction_readahead_size" : lambda : random.choice(
+    # "compaction_readahead_size" : lambda : random.choice(
     #    [0, 0, 1024 * 1024]),
-    "db_write_buffer_size" : lambda: random.choice(
-        [0, 0, 0, 1024 * 1024, 8 * 1024 * 1024, 128 * 1024 * 1024]),
-    "avoid_unnecessary_blocking_io" : random.randint(0, 1),
-    "write_dbid_to_manifest" : random.randint(0, 1),
-    "avoid_flush_during_recovery" : lambda: random.choice(
-        [1 if t == 0 else 0 for t in range(0, 8)]),
-    "max_write_batch_group_size_bytes" : lambda: random.choice(
-        [16, 64, 1024 * 1024, 16 * 1024 * 1024]),
-    "level_compaction_dynamic_level_bytes" : True,
+    "db_write_buffer_size": lambda: random.choice(
+        [0, 0, 0, 1024 * 1024, 8 * 1024 * 1024, 128 * 1024 * 1024]
+    ),
+    "avoid_unnecessary_blocking_io": random.randint(0, 1),
+    "write_dbid_to_manifest": random.randint(0, 1),
+    "avoid_flush_during_recovery": lambda: random.choice(
+        [1 if t == 0 else 0 for t in range(0, 8)]
+    ),
+    "max_write_batch_group_size_bytes": lambda: random.choice(
+        [16, 64, 1024 * 1024, 16 * 1024 * 1024]
+    ),
+    "level_compaction_dynamic_level_bytes": True,
     "verify_checksum_one_in": 1000000,
     "verify_db_one_in": 100000,
-    "continuous_verification_interval" : 0,
+    "continuous_verification_interval": 0,
     "max_key_len": 3,
     "key_len_percent_dist": "1,30,69",
     "read_fault_one_in": lambda: random.choice([0, 32, 1000]),
@@ -166,10 +172,11 @@ default_params = {
     "get_property_one_in": 1000000,
     "paranoid_file_checks": lambda: random.choice([0, 1, 1, 1]),
     "max_write_buffer_size_to_maintain": lambda: random.choice(
-        [0, 1024 * 1024, 2 * 1024 * 1024, 4 * 1024 * 1024, 8 * 1024 * 1024]),
+        [0, 1024 * 1024, 2 * 1024 * 1024, 4 * 1024 * 1024, 8 * 1024 * 1024]
+    ),
     "user_timestamp_size": 0,
-    "secondary_cache_fault_one_in" : lambda: random.choice([0, 0, 32]),
-    "prepopulate_block_cache" : lambda: random.choice([0, 1]),
+    "secondary_cache_fault_one_in": lambda: random.choice([0, 0, 32]),
+    "prepopulate_block_cache": lambda: random.choice([0, 1]),
     "memtable_prefix_bloom_size_ratio": lambda: random.choice([0.001, 0.01, 0.1, 0.5]),
     "memtable_whole_key_filtering": lambda: random.randint(0, 1),
     "detect_filter_construct_corruption": lambda: random.choice([0, 1]),
@@ -177,9 +184,13 @@ default_params = {
     "async_io": lambda: random.choice([0, 1]),
     "wal_compression": lambda: random.choice(["none", "zstd"]),
     "verify_sst_unique_id_in_manifest": 1,  # always do unique_id verification
-    "secondary_cache_uri":  lambda: random.choice(
-        ["", "compressed_secondary_cache://capacity=8388608",
-         "compressed_secondary_cache://capacity=8388608;enable_custom_split_merge=true"]),
+    "secondary_cache_uri": lambda: random.choice(
+        [
+            "",
+            "compressed_secondary_cache://capacity=8388608",
+            "compressed_secondary_cache://capacity=8388608;enable_custom_split_merge=true",
+        ]
+    ),
     "allow_data_in_errors": True,
     "readahead_size": lambda: random.choice([0, 16384, 524288]),
     "initial_auto_readahead_size": lambda: random.choice([0, 16384, 524288]),
@@ -187,11 +198,12 @@ default_params = {
     "num_file_reads_for_auto_readahead": lambda: random.choice([0, 1, 2]),
 }
 
-_TEST_DIR_ENV_VAR = 'TEST_TMPDIR'
-_DEBUG_LEVEL_ENV_VAR = 'DEBUG_LEVEL'
+_TEST_DIR_ENV_VAR = "TEST_TMPDIR"
+_DEBUG_LEVEL_ENV_VAR = "DEBUG_LEVEL"
 
 stress_cmd = "./db_stress"
 
+
 def is_release_mode():
     return os.environ.get(_DEBUG_LEVEL_ENV_VAR) == "0"
 
@@ -207,7 +219,10 @@ def get_dbname(test_name):
         os.mkdir(dbname)
     return dbname
 
+
 expected_values_dir = None
+
+
 def setup_expected_values_dir():
     global expected_values_dir
     if expected_values_dir is not None:
@@ -215,8 +230,7 @@ def setup_expected_values_dir():
     expected_dir_prefix = "rocksdb_crashtest_expected_"
     test_tmpdir = os.environ.get(_TEST_DIR_ENV_VAR)
     if test_tmpdir is None or test_tmpdir == "":
-        expected_values_dir = tempfile.mkdtemp(
-            prefix=expected_dir_prefix)
+        expected_values_dir = tempfile.mkdtemp(prefix=expected_dir_prefix)
     else:
         # if tmpdir is specified, store the expected_values_dir under that dir
         expected_values_dir = test_tmpdir + "/rocksdb_crashtest_expected"
@@ -225,7 +239,10 @@ def setup_expected_values_dir():
         os.mkdir(expected_values_dir)
     return expected_values_dir
 
+
 multiops_txn_key_spaces_file = None
+
+
 def setup_multiops_txn_key_spaces_file():
     global multiops_txn_key_spaces_file
     if multiops_txn_key_spaces_file is not None:
@@ -233,13 +250,15 @@ def setup_multiops_txn_key_spaces_file():
     key_spaces_file_prefix = "rocksdb_crashtest_multiops_txn_key_spaces"
     test_tmpdir = os.environ.get(_TEST_DIR_ENV_VAR)
     if test_tmpdir is None or test_tmpdir == "":
-        multiops_txn_key_spaces_file = tempfile.mkstemp(
-                prefix=key_spaces_file_prefix)[1]
+        multiops_txn_key_spaces_file = tempfile.mkstemp(prefix=key_spaces_file_prefix)[
+            1
+        ]
     else:
         if not os.path.exists(test_tmpdir):
             os.mkdir(test_tmpdir)
         multiops_txn_key_spaces_file = tempfile.mkstemp(
-                prefix=key_spaces_file_prefix, dir=test_tmpdir)[1]
+            prefix=key_spaces_file_prefix, dir=test_tmpdir
+        )[1]
     return multiops_txn_key_spaces_file
 
 
@@ -291,7 +310,7 @@ simple_default_params = {
     "write_buffer_size": 32 * 1024 * 1024,
     "level_compaction_dynamic_level_bytes": False,
     "paranoid_file_checks": lambda: random.choice([0, 1, 1, 1]),
-    "verify_iterator_with_expected_state_one_in": 5  # this locks a range of keys
+    "verify_iterator_with_expected_state_one_in": 5,  # this locks a range of keys
 }
 
 blackbox_simple_default_params = {
@@ -317,7 +336,7 @@ cf_consistency_params = {
 }
 
 txn_params = {
-    "use_txn" : 1,
+    "use_txn": 1,
     # Avoid lambda to set it once for the entire test
     "txn_write_policy": random.randint(0, 2),
     "unordered_write": random.randint(0, 1),
@@ -347,10 +366,14 @@ blob_params = {
     "blob_file_size": lambda: random.choice([1048576, 16777216, 268435456, 1073741824]),
     "blob_compression_type": lambda: random.choice(["none", "snappy", "lz4", "zstd"]),
     "enable_blob_garbage_collection": lambda: random.choice([0] + [1] * 3),
-    "blob_garbage_collection_age_cutoff": lambda: random.choice([0.0, 0.25, 0.5, 0.75, 1.0]),
+    "blob_garbage_collection_age_cutoff": lambda: random.choice(
+        [0.0, 0.25, 0.5, 0.75, 1.0]
+    ),
     "blob_garbage_collection_force_threshold": lambda: random.choice([0.5, 0.75, 1.0]),
     "blob_compaction_readahead_size": lambda: random.choice([0, 1048576, 4194304]),
-    "blob_file_starting_level": lambda: random.choice([0] * 4 + [1] * 3 + [2] * 2 + [3]),
+    "blob_file_starting_level": lambda: random.choice(
+        [0] * 4 + [1] * 3 + [2] * 2 + [3]
+    ),
     "use_blob_cache": lambda: random.randint(0, 1),
     "use_shared_block_and_blob_cache": lambda: random.randint(0, 1),
     "blob_cache_size": lambda: random.choice([1048576, 2097152, 4194304, 8388608]),
@@ -418,7 +441,7 @@ multiops_txn_default_params = {
     # compactions.
     "flush_one_in": 1000,
     "key_spaces_path": setup_multiops_txn_key_spaces_file(),
-    "rollback_one_in":  4,
+    "rollback_one_in": 4,
     # Re-enable once we have a compaction for MultiOpsTxnStressTest
     "enable_compaction_filter": 0,
     "create_timestamped_snapshot_one_in": 50,
@@ -446,11 +469,11 @@ multiops_wp_txn_params = {
     "create_timestamped_snapshot_one_in": 0,
 }
 
+
 def finalize_and_sanitize(src_params):
-    dest_params = dict([(k,  v() if callable(v) else v)
-                        for (k, v) in src_params.items()])
+    dest_params = {k : v() if callable(v) else v for (k, v) in src_params.items()}
     if is_release_mode():
-        dest_params['read_fault_one_in'] = 0
+        dest_params["read_fault_one_in"] = 0
     if dest_params.get("compression_max_dict_bytes") == 0:
         dest_params["compression_zstd_max_train_bytes"] = 0
         dest_params["compression_max_dict_buffer_bytes"] = 0
@@ -466,13 +489,15 @@ def finalize_and_sanitize(src_params):
             # used by `IngestExternalFile()`, causing it to fail with mmap
             # reads. Remove this once it is fixed.
             dest_params["ingest_external_file_one_in"] = 0
-    if (dest_params["use_direct_io_for_flush_and_compaction"] == 1
-            or dest_params["use_direct_reads"] == 1) and \
-            not is_direct_io_supported(dest_params["db"]):
+    if (
+        dest_params["use_direct_io_for_flush_and_compaction"] == 1
+        or dest_params["use_direct_reads"] == 1
+    ) and not is_direct_io_supported(dest_params["db"]):
         if is_release_mode():
-            print("{} does not support direct IO. Disabling use_direct_reads and "
-                    "use_direct_io_for_flush_and_compaction.\n".format(
-                        dest_params["db"]))
+            print(
+                "{} does not support direct IO. Disabling use_direct_reads and "
+                "use_direct_io_for_flush_and_compaction.\n".format(dest_params["db"])
+            )
             dest_params["use_direct_reads"] = 0
             dest_params["use_direct_io_for_flush_and_compaction"] = 0
         else:
@@ -480,18 +505,22 @@ def finalize_and_sanitize(src_params):
 
     # Multi-key operations are not currently compatible with transactions or
     # timestamp.
-    if (dest_params.get("test_batches_snapshots") == 1 or
-        dest_params.get("use_txn") == 1 or
-        dest_params.get("user_timestamp_size") > 0):
+    if (
+        dest_params.get("test_batches_snapshots") == 1
+        or dest_params.get("use_txn") == 1
+        or dest_params.get("user_timestamp_size") > 0
+    ):
         dest_params["delpercent"] += dest_params["delrangepercent"]
         dest_params["delrangepercent"] = 0
         dest_params["ingest_external_file_one_in"] = 0
     # Correctness testing with unsync data loss is not currently compatible
     # with transactions
-    if (dest_params.get("use_txn") == 1):
+    if dest_params.get("use_txn") == 1:
         dest_params["sync_fault_injection"] = 0
-    if (dest_params.get("disable_wal") == 1 or
-        dest_params.get("sync_fault_injection") == 1):
+    if (
+        dest_params.get("disable_wal") == 1
+        or dest_params.get("sync_fault_injection") == 1
+    ):
         # File ingestion does not guarantee prefix-recoverability when unsynced
         # data can be lost. Ingesting a file syncs data immediately that is
         # newer than unsynced memtable data that can be lost on restart.
@@ -544,8 +573,10 @@ def finalize_and_sanitize(src_params):
         dest_params["readpercent"] += dest_params.get("prefixpercent", 20)
         dest_params["prefixpercent"] = 0
         dest_params["test_batches_snapshots"] = 0
-    if (dest_params.get("prefix_size") == -1 and
-        dest_params.get("memtable_whole_key_filtering") == 0):
+    if (
+        dest_params.get("prefix_size") == -1
+        and dest_params.get("memtable_whole_key_filtering") == 0
+    ):
         dest_params["memtable_prefix_bloom_size_ratio"] = 0
     if dest_params.get("two_write_queues") == 1:
         dest_params["enable_pipelined_write"] = 0
@@ -566,19 +597,20 @@ def finalize_and_sanitize(src_params):
 
     return dest_params
 
+
 def gen_cmd_params(args):
     params = {}
 
     params.update(default_params)
-    if args.test_type == 'blackbox':
+    if args.test_type == "blackbox":
         params.update(blackbox_default_params)
-    if args.test_type == 'whitebox':
+    if args.test_type == "whitebox":
         params.update(whitebox_default_params)
     if args.simple:
         params.update(simple_default_params)
-        if args.test_type == 'blackbox':
+        if args.test_type == "blackbox":
             params.update(blackbox_simple_default_params)
-        if args.test_type == 'whitebox':
+        if args.test_type == "whitebox":
             params.update(whitebox_simple_default_params)
     if args.cf_consistency:
         params.update(cf_consistency_params)
@@ -590,9 +622,9 @@ def gen_cmd_params(args):
         params.update(ts_params)
     if args.test_multiops_txn:
         params.update(multiops_txn_default_params)
-        if args.write_policy == 'write_committed':
+        if args.write_policy == "write_committed":
             params.update(multiops_wc_txn_params)
-        elif args.write_policy == 'write_prepared':
+        elif args.write_policy == "write_prepared":
             params.update(multiops_wp_txn_params)
     if args.test_tiered_storage:
         params.update(tiered_params)
@@ -600,9 +632,12 @@ def gen_cmd_params(args):
     # Best-effort recovery, user defined timestamp, tiered storage are currently
     # incompatible with BlobDB. Test BE recovery if specified on the command
     # line; otherwise, apply BlobDB related overrides with a 10% chance.
-    if (not args.test_best_efforts_recovery and
-        not args.enable_ts and not args.test_tiered_storage and
-        random.choice([0] * 9 + [1]) == 1):
+    if (
+        not args.test_best_efforts_recovery
+        and not args.enable_ts
+        and not args.test_tiered_storage
+        and random.choice([0] * 9 + [1]) == 1
+    ):
         params.update(blob_params)
 
     for k, v in vars(args).items():
@@ -613,68 +648,87 @@ def gen_cmd_params(args):
 
 def gen_cmd(params, unknown_params):
     finalzied_params = finalize_and_sanitize(params)
-    cmd = [stress_cmd] + [
-        '--{0}={1}'.format(k, v)
-        for k, v in [(k, finalzied_params[k]) for k in sorted(finalzied_params)]
-        if k not in set(['test_type', 'simple', 'duration', 'interval',
-                         'random_kill_odd', 'cf_consistency', 'txn',
-                         'test_best_efforts_recovery', 'enable_ts',
-                         'test_multiops_txn', 'write_policy', 'stress_cmd',
-                         'test_tiered_storage'])
-        and v is not None] + unknown_params
+    cmd = (
+        [stress_cmd]
+        + [
+            "--{0}={1}".format(k, v)
+            for k, v in [(k, finalzied_params[k]) for k in sorted(finalzied_params)]
+            if k
+            not in {
+                    "test_type",
+                    "simple",
+                    "duration",
+                    "interval",
+                    "random_kill_odd",
+                    "cf_consistency",
+                    "txn",
+                    "test_best_efforts_recovery",
+                    "enable_ts",
+                    "test_multiops_txn",
+                    "write_policy",
+                    "stress_cmd",
+                    "test_tiered_storage",
+                }
+            and v is not None
+        ]
+        + unknown_params
+    )
     return cmd
 
 
 def execute_cmd(cmd, timeout):
-    child = subprocess.Popen(cmd, stderr=subprocess.PIPE,
-                             stdout=subprocess.PIPE)
-    print("Running db_stress with pid=%d: %s\n\n"
-          % (child.pid, ' '.join(cmd)))
+    child = subprocess.Popen(cmd, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
+    print("Running db_stress with pid=%d: %s\n\n" % (child.pid, " ".join(cmd)))
 
     try:
         outs, errs = child.communicate(timeout=timeout)
         hit_timeout = False
-        print("WARNING: db_stress ended before kill: exitcode=%d\n"
-              % child.returncode)
+        print("WARNING: db_stress ended before kill: exitcode=%d\n" % child.returncode)
     except subprocess.TimeoutExpired:
         hit_timeout = True
         child.kill()
         print("KILLED %d\n" % child.pid)
         outs, errs = child.communicate()
 
-    return hit_timeout, child.returncode, outs.decode('utf-8'), errs.decode('utf-8')
+    return hit_timeout, child.returncode, outs.decode("utf-8"), errs.decode("utf-8")
 
 
 # This script runs and kills db_stress multiple times. It checks consistency
 # in case of unsafe crashes in RocksDB.
 def blackbox_crash_main(args, unknown_args):
     cmd_params = gen_cmd_params(args)
-    dbname = get_dbname('blackbox')
-    exit_time = time.time() + cmd_params['duration']
-
-    print("Running blackbox-crash-test with \n"
-          + "interval_between_crash=" + str(cmd_params['interval']) + "\n"
-          + "total-duration=" + str(cmd_params['duration']) + "\n")
+    dbname = get_dbname("blackbox")
+    exit_time = time.time() + cmd_params["duration"]
+
+    print(
+        "Running blackbox-crash-test with \n"
+        + "interval_between_crash="
+        + str(cmd_params["interval"])
+        + "\n"
+        + "total-duration="
+        + str(cmd_params["duration"])
+        + "\n"
+    )
 
     while time.time() < exit_time:
-        cmd = gen_cmd(dict(
-            list(cmd_params.items())
-            + list({'db': dbname}.items())), unknown_args)
+        cmd = gen_cmd(
+            dict(list(cmd_params.items()) + list({"db": dbname}.items())), unknown_args
+        )
 
-        hit_timeout, retcode, outs, errs = execute_cmd(cmd, cmd_params['interval'])
+        hit_timeout, retcode, outs, errs = execute_cmd(cmd, cmd_params["interval"])
 
         if not hit_timeout:
-            print('Exit Before Killing')
-            print('stdout:')
+            print("Exit Before Killing")
+            print("stdout:")
             print(outs)
-            print('stderr:')
+            print("stderr:")
             print(errs)
             sys.exit(2)
 
-        for line in errs.split('\n'):
-            if line != '' and  not line.startswith('WARNING'):
-                print('stderr has error message:')
-                print('***' + line + '***')
+        for line in errs.split("\n"):
+            if line != "" and not line.startswith("WARNING"):
+                print("stderr has error message:")
+                print("***" + line + "***")
 
         time.sleep(1)  # time to stabilize before the next run
 
@@ -688,89 +742,109 @@ def blackbox_crash_main(args, unknown_args):
 # kill_random_test that causes rocksdb to crash at various points in code.
 def whitebox_crash_main(args, unknown_args):
     cmd_params = gen_cmd_params(args)
-    dbname = get_dbname('whitebox')
+    dbname = get_dbname("whitebox")
 
     cur_time = time.time()
-    exit_time = cur_time + cmd_params['duration']
-    half_time = cur_time + cmd_params['duration'] // 2
+    exit_time = cur_time + cmd_params["duration"]
+    half_time = cur_time + cmd_params["duration"] // 2
 
-    print("Running whitebox-crash-test with \n"
-          + "total-duration=" + str(cmd_params['duration']) + "\n")
+    print(
+        "Running whitebox-crash-test with \n"
+        + "total-duration="
+        + str(cmd_params["duration"])
+        + "\n"
+    )
 
     total_check_mode = 4
     check_mode = 0
-    kill_random_test = cmd_params['random_kill_odd']
+    kill_random_test = cmd_params["random_kill_odd"]
     kill_mode = 0
 
     while time.time() < exit_time:
         if check_mode == 0:
             additional_opts = {
                 # use large ops per thread since we will kill it anyway
-                "ops_per_thread": 100 * cmd_params['ops_per_thread'],
+                "ops_per_thread": 100
+                * cmd_params["ops_per_thread"],
             }
             # run with kill_random_test, with three modes.
             # Mode 0 covers all kill points. Mode 1 covers less kill points but
             # increases change of triggering them. Mode 2 covers even less
             # frequent kill points and further increases triggering change.
             if kill_mode == 0:
-                additional_opts.update({
-                    "kill_random_test": kill_random_test,
-                })
+                additional_opts.update(
+                    {
+                        "kill_random_test": kill_random_test,
+                    }
+                )
             elif kill_mode == 1:
-                if cmd_params.get('disable_wal', 0) == 1:
+                if cmd_params.get("disable_wal", 0) == 1:
                     my_kill_odd = kill_random_test // 50 + 1
                 else:
                     my_kill_odd = kill_random_test // 10 + 1
-                additional_opts.update({
-                    "kill_random_test": my_kill_odd,
-                    "kill_exclude_prefixes": "WritableFileWriter::Append,"
-                    + "WritableFileWriter::WriteBuffered",
-                })
+                additional_opts.update(
+                    {
+                        "kill_random_test": my_kill_odd,
+                        "kill_exclude_prefixes": "WritableFileWriter::Append,"
+                        + "WritableFileWriter::WriteBuffered",
+                    }
+                )
             elif kill_mode == 2:
                 # TODO: May need to adjust random odds if kill_random_test
                 # is too small.
-                additional_opts.update({
-                    "kill_random_test": (kill_random_test // 5000 + 1),
-                    "kill_exclude_prefixes": "WritableFileWriter::Append,"
-                    "WritableFileWriter::WriteBuffered,"
-                    "PosixMmapFile::Allocate,WritableFileWriter::Flush",
-                })
+                additional_opts.update(
+                    {
+                        "kill_random_test": (kill_random_test // 5000 + 1),
+                        "kill_exclude_prefixes": "WritableFileWriter::Append,"
+                        "WritableFileWriter::WriteBuffered,"
+                        "PosixMmapFile::Allocate,WritableFileWriter::Flush",
+                    }
+                )
             # Run kill mode 0, 1 and 2 by turn.
             kill_mode = (kill_mode + 1) % 3
         elif check_mode == 1:
             # normal run with universal compaction mode
             additional_opts = {
                 "kill_random_test": None,
-                "ops_per_thread": cmd_params['ops_per_thread'],
+                "ops_per_thread": cmd_params["ops_per_thread"],
                 "compaction_style": 1,
             }
             # Single level universal has a lot of special logic. Ensure we cover
             # it sometimes.
             if random.randint(0, 1) == 1:
-                additional_opts.update({
-                    "num_levels": 1,
-                })
+                additional_opts.update(
+                    {
+                        "num_levels": 1,
+                    }
+                )
         elif check_mode == 2:
             # normal run with FIFO compaction mode
             # ops_per_thread is divided by 5 because FIFO compaction
             # style is quite a bit slower on reads with lot of files
             additional_opts = {
                 "kill_random_test": None,
-                "ops_per_thread": cmd_params['ops_per_thread'] // 5,
+                "ops_per_thread": cmd_params["ops_per_thread"] // 5,
                 "compaction_style": 2,
             }
         else:
             # normal run
             additional_opts = {
                 "kill_random_test": None,
-                "ops_per_thread": cmd_params['ops_per_thread'],
+                "ops_per_thread": cmd_params["ops_per_thread"],
             }
 
-        cmd = gen_cmd(dict(list(cmd_params.items())
-            + list(additional_opts.items())
-            + list({'db': dbname}.items())), unknown_args)
+        cmd = gen_cmd(
+            dict(
+                list(cmd_params.items())
+                + list(additional_opts.items())
+                + list({"db": dbname}.items())
+            ),
+            unknown_args,
+        )
 
-        print("Running:" + ' '.join(cmd) + "\n")  # noqa: E999 T25377293 Grandfathered in
+        print(
+            "Running:" + " ".join(cmd) + "\n"
+        )  # noqa: E999 T25377293 Grandfathered in
 
         # If the running time is 15 minutes over the run time, explicit kill and
         # exit even if white box kill didn't hit. This is to guarantee run time
@@ -779,9 +853,11 @@ def whitebox_crash_main(args, unknown_args):
         # TODO detect a hanging condition. The job might run too long as RocksDB
         # hits a hanging bug.
         hit_timeout, retncode, stdoutdata, stderrdata = execute_cmd(
-            cmd, exit_time - time.time() + 900)
-        msg = ("check_mode={0}, kill option={1}, exitcode={2}\n".format(
-               check_mode, additional_opts['kill_random_test'], retncode))
+            cmd, exit_time - time.time() + 900
+        )
+        msg = "check_mode={0}, kill option={1}, exitcode={2}\n".format(
+            check_mode, additional_opts["kill_random_test"], retncode
+        )
 
         print(msg)
         print(stdoutdata)
@@ -792,10 +868,10 @@ def whitebox_crash_main(args, unknown_args):
             break
 
         expected = False
-        if additional_opts['kill_random_test'] is None and (retncode == 0):
+        if additional_opts["kill_random_test"] is None and (retncode == 0):
             # we expect zero retncode if no kill option
             expected = True
-        elif additional_opts['kill_random_test'] is not None and retncode <= 0:
+        elif additional_opts["kill_random_test"] is not None and retncode <= 0:
             # When kill option is given, the test MIGHT kill itself.
             # If it does, negative retncode is expected. Otherwise 0.
             expected = True
@@ -805,15 +881,13 @@ def whitebox_crash_main(args, unknown_args):
             sys.exit(1)
 
         stderrdata = stderrdata.lower()
-        errorcount = (stderrdata.count('error') -
-                      stderrdata.count('got errors 0 times'))
-        print("#times error occurred in output is " + str(errorcount) +
-                "\n")
+        errorcount = stderrdata.count("error") - stderrdata.count("got errors 0 times")
+        print("#times error occurred in output is " + str(errorcount) + "\n")
 
-        if (errorcount > 0):
+        if errorcount > 0:
             print("TEST FAILED. Output has 'error'!!!\n")
             sys.exit(2)
-        if (stderrdata.find('fail') >= 0):
+        if stderrdata.find("fail") >= 0:
             print("TEST FAILED. Output has 'fail'!!!\n")
             sys.exit(2)
 
@@ -824,7 +898,7 @@ def whitebox_crash_main(args, unknown_args):
             # success
             shutil.rmtree(dbname, True)
             os.mkdir(dbname)
-            cmd_params.pop('expected_values_dir', None)
+            cmd_params.pop("expected_values_dir", None)
             check_mode = (check_mode + 1) % total_check_mode
 
         time.sleep(1)  # time to stabilize after a kill
@@ -833,34 +907,38 @@ def whitebox_crash_main(args, unknown_args):
 def main():
     global stress_cmd
 
-    parser = argparse.ArgumentParser(description="This script runs and kills \
-        db_stress multiple times")
+    parser = argparse.ArgumentParser(
+        description="This script runs and kills \
+        db_stress multiple times"
+    )
     parser.add_argument("test_type", choices=["blackbox", "whitebox"])
     parser.add_argument("--simple", action="store_true")
-    parser.add_argument("--cf_consistency", action='store_true')
-    parser.add_argument("--txn", action='store_true')
-    parser.add_argument("--test_best_efforts_recovery", action='store_true')
-    parser.add_argument("--enable_ts", action='store_true')
-    parser.add_argument("--test_multiops_txn", action='store_true')
+    parser.add_argument("--cf_consistency", action="store_true")
+    parser.add_argument("--txn", action="store_true")
+    parser.add_argument("--test_best_efforts_recovery", action="store_true")
+    parser.add_argument("--enable_ts", action="store_true")
+    parser.add_argument("--test_multiops_txn", action="store_true")
     parser.add_argument("--write_policy", choices=["write_committed", "write_prepared"])
     parser.add_argument("--stress_cmd")
-    parser.add_argument("--test_tiered_storage", action='store_true')
-
-    all_params = dict(list(default_params.items())
-                      + list(blackbox_default_params.items())
-                      + list(whitebox_default_params.items())
-                      + list(simple_default_params.items())
-                      + list(blackbox_simple_default_params.items())
-                      + list(whitebox_simple_default_params.items())
-                      + list(blob_params.items())
-                      + list(ts_params.items())
-                      + list(multiops_txn_default_params.items())
-                      + list(multiops_wc_txn_params.items())
-                      + list(multiops_wp_txn_params.items())
-                      + list(best_efforts_recovery_params.items())
-                      + list(cf_consistency_params.items())
-                      + list(tiered_params.items())
-                      + list(txn_params.items()))
+    parser.add_argument("--test_tiered_storage", action="store_true")
+
+    all_params = dict(
+        list(default_params.items())
+        + list(blackbox_default_params.items())
+        + list(whitebox_default_params.items())
+        + list(simple_default_params.items())
+        + list(blackbox_simple_default_params.items())
+        + list(whitebox_simple_default_params.items())
+        + list(blob_params.items())
+        + list(ts_params.items())
+        + list(multiops_txn_default_params.items())
+        + list(multiops_wc_txn_params.items())
+        + list(multiops_wp_txn_params.items())
+        + list(best_efforts_recovery_params.items())
+        + list(cf_consistency_params.items())
+        + list(tiered_params.items())
+        + list(txn_params.items())
+    )
 
     for k, v in all_params.items():
         parser.add_argument("--" + k, type=type(v() if callable(v) else v))
@@ -869,15 +947,17 @@ def main():
 
     test_tmpdir = os.environ.get(_TEST_DIR_ENV_VAR)
     if test_tmpdir is not None and not os.path.isdir(test_tmpdir):
-        print('%s env var is set to a non-existent directory: %s' %
-                (_TEST_DIR_ENV_VAR, test_tmpdir))
+        print(
+            "%s env var is set to a non-existent directory: %s"
+            % (_TEST_DIR_ENV_VAR, test_tmpdir)
+        )
         sys.exit(1)
 
     if args.stress_cmd:
         stress_cmd = args.stress_cmd
-    if args.test_type == 'blackbox':
+    if args.test_type == "blackbox":
         blackbox_crash_main(args, unknown_args)
-    if args.test_type == 'whitebox':
+    if args.test_type == "whitebox":
         whitebox_crash_main(args, unknown_args)
     # Only delete the `expected_values_dir` if test passes
     if expected_values_dir is not None:
@@ -886,5 +966,5 @@ def main():
         os.remove(multiops_txn_key_spaces_file)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()

tools/ldb_test.py

@@ -2,65 +2,72 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 from __future__ import absolute_import, division, print_function, unicode_literals
 
-import os
 import glob
+
+import os
 import os.path
+import re
 import shutil
 import subprocess
+import tempfile
 import time
 import unittest
-import tempfile
-import re
+
 
 def my_check_output(*popenargs, **kwargs):
     """
     If we had python 2.7, we should simply use subprocess.check_output.
     This is a stop-gap solution for python 2.6
     """
-    if 'stdout' in kwargs:
-        raise ValueError('stdout argument not allowed, it will be overridden.')
-    process = subprocess.Popen(stderr=subprocess.PIPE, stdout=subprocess.PIPE,
-                               *popenargs, **kwargs)
+    if "stdout" in kwargs:
+        raise ValueError("stdout argument not allowed, it will be overridden.")
+    process = subprocess.Popen(
+        stderr=subprocess.PIPE, stdout=subprocess.PIPE, *popenargs, **kwargs
+    )
     output, unused_err = process.communicate()
     retcode = process.poll()
     if retcode:
         cmd = kwargs.get("args")
         if cmd is None:
             cmd = popenargs[0]
-        raise Exception("Exit code is not 0.  It is %d.  Command: %s" %
-                (retcode, cmd))
-    return output.decode('utf-8')
+        raise Exception("Exit code is not 0.  It is %d.  Command: %s" % (retcode, cmd))
+    return output.decode("utf-8")
+
 
 def run_err_null(cmd):
     return os.system(cmd + " 2>/dev/null ")
 
+
 class LDBTestCase(unittest.TestCase):
     def setUp(self):
-        self.TMP_DIR  = tempfile.mkdtemp(prefix="ldb_test_")
+        self.TMP_DIR = tempfile.mkdtemp(prefix="ldb_test_")
         self.DB_NAME = "testdb"
 
     def tearDown(self):
-        assert(self.TMP_DIR.strip() != "/"
-                and self.TMP_DIR.strip() != "/tmp"
-                and self.TMP_DIR.strip() != "/tmp/") #Just some paranoia
+        assert (
+            self.TMP_DIR.strip() != "/"
+            and self.TMP_DIR.strip() != "/tmp"
+            and self.TMP_DIR.strip() != "/tmp/"
+        )  # Just some paranoia
 
         shutil.rmtree(self.TMP_DIR)
 
     def dbParam(self, dbName):
         return "--db=%s" % os.path.join(self.TMP_DIR, dbName)
 
-    def assertRunOKFull(self, params, expectedOutput, unexpected=False,
-                        isPattern=False):
+    def assertRunOKFull(
+        self, params, expectedOutput, unexpected=False, isPattern=False
+    ):
         """
         All command-line params must be specified.
         Allows full flexibility in testing; for example: missing db param.
         """
-        output = my_check_output("./ldb %s |grep -v \"Created bg thread\"" %
-                            params, shell=True)
+        output = my_check_output(
+            './ldb %s |grep -v "Created bg thread"' % params, shell=True
+        )
         if not unexpected:
             if isPattern:
-                self.assertNotEqual(expectedOutput.search(output.strip()),
-                                    None)
+                self.assertNotEqual(expectedOutput.search(output.strip()), None)
             else:
                 self.assertEqual(output.strip(), expectedOutput.strip())
         else:
@@ -76,20 +83,25 @@ class LDBTestCase(unittest.TestCase):
         """
         try:
 
-            my_check_output("./ldb %s >/dev/null 2>&1 |grep -v \"Created bg \
-                thread\"" % params, shell=True)
+            my_check_output(
+                './ldb %s >/dev/null 2>&1 |grep -v "Created bg \
+                thread"'
+                % params,
+                shell=True,
+            )
         except Exception:
             return
         self.fail(
-            "Exception should have been raised for command with params: %s" %
-            params)
+            "Exception should have been raised for command with params: %s" % params
+        )
 
     def assertRunOK(self, params, expectedOutput, unexpected=False):
         """
         Uses the default test db.
         """
-        self.assertRunOKFull("%s %s" % (self.dbParam(self.DB_NAME), params),
-                             expectedOutput, unexpected)
+        self.assertRunOKFull(
+            "%s %s" % (self.dbParam(self.DB_NAME), params), expectedOutput, unexpected
+        )
 
     def assertRunFAIL(self, params):
         """
@@ -118,16 +130,17 @@ class LDBTestCase(unittest.TestCase):
 
         self.assertRunOK("scan --to=x2", "x1 : y1")
         self.assertRunOK("scan --from=x1 --to=z --max_keys=1", "x1 : y1")
-        self.assertRunOK("scan --from=x1 --to=z --max_keys=2",
-                "x1 : y1\nx2 : y2")
+        self.assertRunOK("scan --from=x1 --to=z --max_keys=2", "x1 : y1\nx2 : y2")
 
-        self.assertRunOK("scan --from=x1 --to=z --max_keys=3",
-                "x1 : y1\nx2 : y2\nx3 : y3")
-        self.assertRunOK("scan --from=x1 --to=z --max_keys=4",
-                "x1 : y1\nx2 : y2\nx3 : y3")
+        self.assertRunOK(
+            "scan --from=x1 --to=z --max_keys=3", "x1 : y1\nx2 : y2\nx3 : y3"
+        )
+        self.assertRunOK(
+            "scan --from=x1 --to=z --max_keys=4", "x1 : y1\nx2 : y2\nx3 : y3"
+        )
         self.assertRunOK("scan --from=x1 --to=x2", "x1 : y1")
         self.assertRunOK("scan --from=x2 --to=x4", "x2 : y2\nx3 : y3")
-        self.assertRunFAIL("scan --from=x4 --to=z") # No results => FAIL
+        self.assertRunFAIL("scan --from=x4 --to=z")  # No results => FAIL
         self.assertRunFAIL("scan --from=x1 --to=z --max_keys=foo")
 
         self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3")
@@ -148,18 +161,18 @@ class LDBTestCase(unittest.TestCase):
         return 0 == run_err_null("cat %s | ./ldb load %s" % (dumpFile, params))
 
     def writeExternSst(self, params, inputDumpFile, outputSst):
-        return 0 == run_err_null("cat %s | ./ldb write_extern_sst %s %s"
-                % (inputDumpFile, outputSst, params))
+        return 0 == run_err_null(
+            "cat %s | ./ldb write_extern_sst %s %s" % (inputDumpFile, outputSst, params)
+        )
 
     def ingestExternSst(self, params, inputSst):
-        return 0 == run_err_null("./ldb ingest_extern_sst %s %s"
-                                     % (inputSst, params))
+        return 0 == run_err_null("./ldb ingest_extern_sst %s %s" % (inputSst, params))
 
     def testStringBatchPut(self):
         print("Running testStringBatchPut...")
         self.assertRunOK("batchput x1 y1 --create_if_missing", "OK")
         self.assertRunOK("scan", "x1 : y1")
-        self.assertRunOK("batchput x2 y2 x3 y3 \"x4 abc\" \"y4 xyz\"", "OK")
+        self.assertRunOK('batchput x2 y2 x3 y3 "x4 abc" "y4 xyz"', "OK")
         self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 abc : y4 xyz")
         self.assertRunFAIL("batchput")
         self.assertRunFAIL("batchput k1")
@@ -171,7 +184,9 @@ class LDBTestCase(unittest.TestCase):
         dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
         self.assertRunOK("batchput x1 y1 --create_if_missing --enable_blob_files", "OK")
         self.assertRunOK("scan", "x1 : y1")
-        self.assertRunOK("batchput --enable_blob_files x2 y2 x3 y3 \"x4 abc\" \"y4 xyz\"", "OK")
+        self.assertRunOK(
+            'batchput --enable_blob_files x2 y2 x3 y3 "x4 abc" "y4 xyz"', "OK"
+        )
         self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 abc : y4 xyz")
 
         blob_files = self.getBlobFiles(dbPath)
@@ -195,13 +210,18 @@ class LDBTestCase(unittest.TestCase):
         print("Running testBlobStartingLevel...")
 
         dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
-        self.assertRunOK("put --create_if_missing --enable_blob_files --blob_file_starting_level=10 x1 y1", "OK")
+        self.assertRunOK(
+            "put --create_if_missing --enable_blob_files --blob_file_starting_level=10 x1 y1",
+            "OK",
+        )
         self.assertRunOK("get x1", "y1")
 
         blob_files = self.getBlobFiles(dbPath)
         self.assertTrue(len(blob_files) == 0)
 
-        self.assertRunOK("put --enable_blob_files --blob_file_starting_level=0 x2 y2", "OK")
+        self.assertRunOK(
+            "put --enable_blob_files --blob_file_starting_level=0 x2 y2", "OK"
+        )
         self.assertRunOK("get x1", "y1")
         self.assertRunOK("get x2", "y2")
         self.assertRunFAIL("get x3")
@@ -213,19 +233,37 @@ class LDBTestCase(unittest.TestCase):
         print("Running testCountDelimDump...")
         self.assertRunOK("batchput x.1 x1 --create_if_missing", "OK")
         self.assertRunOK("batchput y.abc abc y.2 2 z.13c pqr", "OK")
-        self.assertRunOK("dump --count_delim", "x => count:1\tsize:5\ny => count:2\tsize:12\nz => count:1\tsize:8")
-        self.assertRunOK("dump --count_delim=\".\"", "x => count:1\tsize:5\ny => count:2\tsize:12\nz => count:1\tsize:8")
+        self.assertRunOK(
+            "dump --count_delim",
+            "x => count:1\tsize:5\ny => count:2\tsize:12\nz => count:1\tsize:8",
+        )
+        self.assertRunOK(
+            'dump --count_delim="."',
+            "x => count:1\tsize:5\ny => count:2\tsize:12\nz => count:1\tsize:8",
+        )
         self.assertRunOK("batchput x,2 x2 x,abc xabc", "OK")
-        self.assertRunOK("dump --count_delim=\",\"", "x => count:2\tsize:14\nx.1 => count:1\tsize:5\ny.2 => count:1\tsize:4\ny.abc => count:1\tsize:8\nz.13c => count:1\tsize:8")
+        self.assertRunOK(
+            'dump --count_delim=","',
+            "x => count:2\tsize:14\nx.1 => count:1\tsize:5\ny.2 => count:1\tsize:4\ny.abc => count:1\tsize:8\nz.13c => count:1\tsize:8",
+        )
 
     def testCountDelimIDump(self):
         print("Running testCountDelimIDump...")
         self.assertRunOK("batchput x.1 x1 --create_if_missing", "OK")
         self.assertRunOK("batchput y.abc abc y.2 2 z.13c pqr", "OK")
-        self.assertRunOK("idump --count_delim", "x => count:1\tsize:5\ny => count:2\tsize:12\nz => count:1\tsize:8")
-        self.assertRunOK("idump --count_delim=\".\"", "x => count:1\tsize:5\ny => count:2\tsize:12\nz => count:1\tsize:8")
+        self.assertRunOK(
+            "idump --count_delim",
+            "x => count:1\tsize:5\ny => count:2\tsize:12\nz => count:1\tsize:8",
+        )
+        self.assertRunOK(
+            'idump --count_delim="."',
+            "x => count:1\tsize:5\ny => count:2\tsize:12\nz => count:1\tsize:8",
+        )
         self.assertRunOK("batchput x,2 x2 x,abc xabc", "OK")
-        self.assertRunOK("idump --count_delim=\",\"", "x => count:2\tsize:14\nx.1 => count:1\tsize:5\ny.2 => count:1\tsize:4\ny.abc => count:1\tsize:8\nz.13c => count:1\tsize:8")
+        self.assertRunOK(
+            'idump --count_delim=","',
+            "x => count:2\tsize:14\nx.1 => count:1\tsize:5\ny.2 => count:1\tsize:4\ny.abc => count:1\tsize:8\nz.13c => count:1\tsize:8",
+        )
 
     def testInvalidCmdLines(self):
         print("Running testInvalidCmdLines...")
@@ -253,12 +291,13 @@ class LDBTestCase(unittest.TestCase):
         self.assertRunOK("get --key_hex 0x6132", "b2")
         self.assertRunOK("get --key_hex --value_hex 0x6132", "0x6232")
         self.assertRunOK("get --value_hex a2", "0x6232")
-        self.assertRunOK("scan --key_hex --value_hex",
-                "0x6131 : 0x6231\n0x6132 : 0x6232")
-        self.assertRunOK("scan --hex --from=0x6131 --to=0x6133",
-                "0x6131 : 0x6231\n0x6132 : 0x6232")
-        self.assertRunOK("scan --hex --from=0x6131 --to=0x6132",
-                "0x6131 : 0x6231")
+        self.assertRunOK(
+            "scan --key_hex --value_hex", "0x6131 : 0x6231\n0x6132 : 0x6232"
+        )
+        self.assertRunOK(
+            "scan --hex --from=0x6131 --to=0x6133", "0x6131 : 0x6231\n0x6132 : 0x6232"
+        )
+        self.assertRunOK("scan --hex --from=0x6131 --to=0x6132", "0x6131 : 0x6231")
         self.assertRunOK("scan --key_hex", "0x6131 : b1\n0x6132 : b2")
         self.assertRunOK("scan --value_hex", "a1 : 0x6231\na2 : 0x6232")
         self.assertRunOK("batchput --hex 0x6133 0x6233 0x6134 0x6234", "OK")
@@ -272,8 +311,7 @@ class LDBTestCase(unittest.TestCase):
         self.assertRunOK("put a1 b1 --ttl --create_if_missing", "OK")
         self.assertRunOK("scan --hex", "0x6131 : 0x6231", True)
         self.assertRunOK("dump --ttl ", "a1 ==> b1", True)
-        self.assertRunOK("dump --hex --ttl ",
-                         "0x6131 ==> 0x6231\nKeys in range: 1")
+        self.assertRunOK("dump --hex --ttl ", "0x6131 ==> 0x6231\nKeys in range: 1")
         self.assertRunOK("scan --hex --ttl", "0x6131 : 0x6231")
         self.assertRunOK("get --value_hex a1", "0x6231", True)
         self.assertRunOK("get --ttl a1", "b1")
@@ -295,8 +333,7 @@ class LDBTestCase(unittest.TestCase):
 
     def testDumpLoad(self):
         print("Running testDumpLoad...")
-        self.assertRunOK("batchput --create_if_missing x1 y1 x2 y2 x3 y3 x4 y4",
-                "OK")
+        self.assertRunOK("batchput --create_if_missing x1 y1 x2 y2 x3 y3 x4 y4", "OK")
         self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
         origDbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
 
@@ -304,98 +341,125 @@ class LDBTestCase(unittest.TestCase):
         dumpFilePath = os.path.join(self.TMP_DIR, "dump1")
         loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump1")
         self.assertTrue(self.dumpDb("--db=%s" % origDbPath, dumpFilePath))
-        self.assertTrue(self.loadDb(
-            "--db=%s --create_if_missing" % loadedDbPath, dumpFilePath))
-        self.assertRunOKFull("scan --db=%s" % loadedDbPath,
-                "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
+        self.assertTrue(
+            self.loadDb("--db=%s --create_if_missing" % loadedDbPath, dumpFilePath)
+        )
+        self.assertRunOKFull(
+            "scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4"
+        )
 
         # Dump and load in hex
         dumpFilePath = os.path.join(self.TMP_DIR, "dump2")
         loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump2")
         self.assertTrue(self.dumpDb("--db=%s --hex" % origDbPath, dumpFilePath))
-        self.assertTrue(self.loadDb(
-            "--db=%s --hex --create_if_missing" % loadedDbPath, dumpFilePath))
-        self.assertRunOKFull("scan --db=%s" % loadedDbPath,
-                "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
+        self.assertTrue(
+            self.loadDb(
+                "--db=%s --hex --create_if_missing" % loadedDbPath, dumpFilePath
+            )
+        )
+        self.assertRunOKFull(
+            "scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4"
+        )
 
         # Dump only a portion of the key range
         dumpFilePath = os.path.join(self.TMP_DIR, "dump3")
         loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump3")
-        self.assertTrue(self.dumpDb(
-            "--db=%s --from=x1 --to=x3" % origDbPath, dumpFilePath))
-        self.assertTrue(self.loadDb(
-            "--db=%s --create_if_missing" % loadedDbPath, dumpFilePath))
+        self.assertTrue(
+            self.dumpDb("--db=%s --from=x1 --to=x3" % origDbPath, dumpFilePath)
+        )
+        self.assertTrue(
+            self.loadDb("--db=%s --create_if_missing" % loadedDbPath, dumpFilePath)
+        )
         self.assertRunOKFull("scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2")
 
         # Dump upto max_keys rows
         dumpFilePath = os.path.join(self.TMP_DIR, "dump4")
         loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump4")
-        self.assertTrue(self.dumpDb(
-            "--db=%s --max_keys=3" % origDbPath, dumpFilePath))
-        self.assertTrue(self.loadDb(
-            "--db=%s --create_if_missing" % loadedDbPath, dumpFilePath))
-        self.assertRunOKFull("scan --db=%s" % loadedDbPath,
-                "x1 : y1\nx2 : y2\nx3 : y3")
+        self.assertTrue(self.dumpDb("--db=%s --max_keys=3" % origDbPath, dumpFilePath))
+        self.assertTrue(
+            self.loadDb("--db=%s --create_if_missing" % loadedDbPath, dumpFilePath)
+        )
+        self.assertRunOKFull("scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3")
 
         # Load into an existing db, create_if_missing is not specified
         self.assertTrue(self.dumpDb("--db=%s" % origDbPath, dumpFilePath))
         self.assertTrue(self.loadDb("--db=%s" % loadedDbPath, dumpFilePath))
-        self.assertRunOKFull("scan --db=%s" % loadedDbPath,
-                "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
+        self.assertRunOKFull(
+            "scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4"
+        )
 
         # Dump and load with WAL disabled
         dumpFilePath = os.path.join(self.TMP_DIR, "dump5")
         loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump5")
         self.assertTrue(self.dumpDb("--db=%s" % origDbPath, dumpFilePath))
-        self.assertTrue(self.loadDb(
-            "--db=%s --disable_wal --create_if_missing" % loadedDbPath,
-            dumpFilePath))
-        self.assertRunOKFull("scan --db=%s" % loadedDbPath,
-                "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
+        self.assertTrue(
+            self.loadDb(
+                "--db=%s --disable_wal --create_if_missing" % loadedDbPath, dumpFilePath
+            )
+        )
+        self.assertRunOKFull(
+            "scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4"
+        )
 
         # Dump and load with lots of extra params specified
-        extraParams = " ".join(["--bloom_bits=14", "--block_size=1024",
-                                "--auto_compaction=true",
-                                "--write_buffer_size=4194304",
-                                "--file_size=2097152"])
+        extraParams = " ".join(
+            [
+                "--bloom_bits=14",
+                "--block_size=1024",
+                "--auto_compaction=true",
+                "--write_buffer_size=4194304",
+                "--file_size=2097152",
+            ]
+        )
         dumpFilePath = os.path.join(self.TMP_DIR, "dump6")
         loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump6")
-        self.assertTrue(self.dumpDb(
-            "--db=%s %s" % (origDbPath, extraParams), dumpFilePath))
-        self.assertTrue(self.loadDb(
-            "--db=%s %s --create_if_missing" % (loadedDbPath, extraParams),
-            dumpFilePath))
-        self.assertRunOKFull("scan --db=%s" % loadedDbPath,
-                "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
+        self.assertTrue(
+            self.dumpDb("--db=%s %s" % (origDbPath, extraParams), dumpFilePath)
+        )
+        self.assertTrue(
+            self.loadDb(
+                "--db=%s %s --create_if_missing" % (loadedDbPath, extraParams),
+                dumpFilePath,
+            )
+        )
+        self.assertRunOKFull(
+            "scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4"
+        )
 
         # Dump with count_only
         dumpFilePath = os.path.join(self.TMP_DIR, "dump7")
         loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump7")
-        self.assertTrue(self.dumpDb(
-            "--db=%s --count_only" % origDbPath, dumpFilePath))
-        self.assertTrue(self.loadDb(
-            "--db=%s --create_if_missing" % loadedDbPath, dumpFilePath))
+        self.assertTrue(self.dumpDb("--db=%s --count_only" % origDbPath, dumpFilePath))
+        self.assertTrue(
+            self.loadDb("--db=%s --create_if_missing" % loadedDbPath, dumpFilePath)
+        )
         # DB should have atleast one value for scan to work
         self.assertRunOKFull("put --db=%s k1 v1" % loadedDbPath, "OK")
         self.assertRunOKFull("scan --db=%s" % loadedDbPath, "k1 : v1")
 
         # Dump command fails because of typo in params
         dumpFilePath = os.path.join(self.TMP_DIR, "dump8")
-        self.assertFalse(self.dumpDb(
-            "--db=%s --create_if_missing" % origDbPath, dumpFilePath))
+        self.assertFalse(
+            self.dumpDb("--db=%s --create_if_missing" % origDbPath, dumpFilePath)
+        )
 
         # Dump and load with BlobDB enabled
-        blobParams = " ".join(["--enable_blob_files", "--min_blob_size=1",
-                                "--blob_file_size=2097152"])
+        blobParams = " ".join(
+            ["--enable_blob_files", "--min_blob_size=1", "--blob_file_size=2097152"]
+        )
         dumpFilePath = os.path.join(self.TMP_DIR, "dump9")
         loadedDbPath = os.path.join(self.TMP_DIR, "loaded_from_dump9")
-        self.assertTrue(self.dumpDb(
-            "--db=%s" % (origDbPath), dumpFilePath))
-        self.assertTrue(self.loadDb(
-            "--db=%s %s --create_if_missing --disable_wal" % (loadedDbPath, blobParams),
-            dumpFilePath))
-        self.assertRunOKFull("scan --db=%s" % loadedDbPath,
-                "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
+        self.assertTrue(self.dumpDb("--db=%s" % (origDbPath), dumpFilePath))
+        self.assertTrue(
+            self.loadDb(
+                "--db=%s %s --create_if_missing --disable_wal"
+                % (loadedDbPath, blobParams),
+                dumpFilePath,
+            )
+        )
+        self.assertRunOKFull(
+            "scan --db=%s" % loadedDbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4"
+        )
         blob_files = self.getBlobFiles(loadedDbPath)
         self.assertTrue(len(blob_files) >= 1)
 
@@ -404,12 +468,14 @@ class LDBTestCase(unittest.TestCase):
         self.assertRunOK("put a val --create_if_missing", "OK")
         self.assertRunOK("put b val", "OK")
         self.assertRunOK(
-                "idump", "'a' seq:1, type:1 => val\n"
-                "'b' seq:2, type:1 => val\nInternal keys in range: 2")
+            "idump",
+            "'a' seq:1, type:1 => val\n"
+            "'b' seq:2, type:1 => val\nInternal keys in range: 2",
+        )
         self.assertRunOK(
-                "idump --input_key_hex --from=%s --to=%s" % (hex(ord('a')),
-                                                             hex(ord('b'))),
-                "'a' seq:1, type:1 => val\nInternal keys in range: 1")
+            "idump --input_key_hex --from=%s --to=%s" % (hex(ord("a")), hex(ord("b"))),
+            "'a' seq:1, type:1 => val\nInternal keys in range: 1",
+        )
 
     def testIDumpDecodeBlobIndex(self):
         print("Running testIDumpDecodeBlobIndex...")
@@ -420,45 +486,55 @@ class LDBTestCase(unittest.TestCase):
         regex = ".*\[blob ref\].*"
         expected_pattern = re.compile(regex)
         cmd = "idump %s --decode_blob_index"
-        self.assertRunOKFull((cmd)
-                             % (self.dbParam(self.DB_NAME)),
-                             expected_pattern, unexpected=False,
-                             isPattern=True)
+        self.assertRunOKFull(
+            (cmd) % (self.dbParam(self.DB_NAME)),
+            expected_pattern,
+            unexpected=False,
+            isPattern=True,
+        )
 
     def testMiscAdminTask(self):
         print("Running testMiscAdminTask...")
         # These tests need to be improved; for example with asserts about
         # whether compaction or level reduction actually took place.
-        self.assertRunOK("batchput --create_if_missing x1 y1 x2 y2 x3 y3 x4 y4",
-                "OK")
+        self.assertRunOK("batchput --create_if_missing x1 y1 x2 y2 x3 y3 x4 y4", "OK")
         self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
         origDbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
 
-        self.assertTrue(0 == run_err_null(
-            "./ldb compact --db=%s" % origDbPath))
+        self.assertTrue(0 == run_err_null("./ldb compact --db=%s" % origDbPath))
         self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
 
-        self.assertTrue(0 == run_err_null(
-            "./ldb reduce_levels --db=%s --new_levels=2" % origDbPath))
+        self.assertTrue(
+            0 == run_err_null("./ldb reduce_levels --db=%s --new_levels=2" % origDbPath)
+        )
         self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
 
-        self.assertTrue(0 == run_err_null(
-            "./ldb reduce_levels --db=%s --new_levels=3" % origDbPath))
+        self.assertTrue(
+            0 == run_err_null("./ldb reduce_levels --db=%s --new_levels=3" % origDbPath)
+        )
         self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
 
-        self.assertTrue(0 == run_err_null(
-            "./ldb compact --db=%s --from=x1 --to=x3" % origDbPath))
+        self.assertTrue(
+            0 == run_err_null("./ldb compact --db=%s --from=x1 --to=x3" % origDbPath)
+        )
         self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
 
-        self.assertTrue(0 == run_err_null(
-            "./ldb compact --db=%s --hex --from=0x6131 --to=0x6134"
-            % origDbPath))
+        self.assertTrue(
+            0
+            == run_err_null(
+                "./ldb compact --db=%s --hex --from=0x6131 --to=0x6134" % origDbPath
+            )
+        )
         self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
 
-        #TODO(dilip): Not sure what should be passed to WAL.Currently corrupted.
-        self.assertTrue(0 == run_err_null(
-            "./ldb dump_wal --db=%s --walfile=%s --header" % (
-                origDbPath, os.path.join(origDbPath, "LOG"))))
+        # TODO(dilip): Not sure what should be passed to WAL.Currently corrupted.
+        self.assertTrue(
+            0
+            == run_err_null(
+                "./ldb dump_wal --db=%s --walfile=%s --header"
+                % (origDbPath, os.path.join(origDbPath, "LOG"))
+            )
+        )
         self.assertRunOK("scan", "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
 
     def testCheckConsistency(self):
@@ -470,8 +546,9 @@ class LDBTestCase(unittest.TestCase):
         self.assertRunOK("get x1", "y1")
         self.assertRunOK("checkconsistency", "OK")
 
-        sstFilePath = my_check_output("ls %s" % os.path.join(dbPath, "*.sst"),
-                                      shell=True)
+        sstFilePath = my_check_output(
+            "ls %s" % os.path.join(dbPath, "*.sst"), shell=True
+        )
 
         # Modify the file
         my_check_output("echo 'evil' > %s" % sstFilePath, shell=True)
@@ -482,8 +559,7 @@ class LDBTestCase(unittest.TestCase):
         self.assertRunFAIL("checkconsistency")
 
     def dumpLiveFiles(self, params, dumpFile):
-        return 0 == run_err_null("./ldb dump_live_files %s > %s" % (
-            params, dumpFile))
+        return 0 == run_err_null("./ldb dump_live_files %s > %s" % (params, dumpFile))
 
     def testDumpLiveFiles(self):
         print("Running testDumpLiveFiles...")
@@ -506,7 +582,12 @@ class LDBTestCase(unittest.TestCase):
             dbPath += "/"
 
         # Call the dump_live_files function with the edited dbPath name.
-        self.assertTrue(self.dumpLiveFiles("--db=%s --decode_blob_index --dump_uncompressed_blobs" % dbPath, dumpFilePath))
+        self.assertTrue(
+            self.dumpLiveFiles(
+                "--db=%s --decode_blob_index --dump_uncompressed_blobs" % dbPath,
+                dumpFilePath,
+            )
+        )
 
         # Investigate the output
         with open(dumpFilePath, "r") as tmp:
@@ -517,14 +598,14 @@ class LDBTestCase(unittest.TestCase):
         self.assertTrue(len(sstFileList) >= 1)
         for sstFilename in sstFileList:
             filenumber = re.findall(r"\d+.sst", sstFilename)[0]
-            self.assertEqual(sstFilename, dbPath+filenumber)
+            self.assertEqual(sstFilename, dbPath + filenumber)
 
         # Check that all the Blob filenames have a correct full path (no multiple '/').
         blobFileList = re.findall(r"%s.*\d+.blob" % dbPath, data)
         self.assertTrue(len(blobFileList) >= 1)
         for blobFilename in blobFileList:
             filenumber = re.findall(r"\d+.blob", blobFilename)[0]
-            self.assertEqual(blobFilename, dbPath+filenumber)
+            self.assertEqual(blobFilename, dbPath + filenumber)
 
         # Check that all the manifest filenames
         # have a correct full path (no multiple '/').
@@ -532,15 +613,16 @@ class LDBTestCase(unittest.TestCase):
         self.assertTrue(len(manifestFileList) >= 1)
         for manifestFilename in manifestFileList:
             filenumber = re.findall(r"(?<=MANIFEST-)\d+", manifestFilename)[0]
-            self.assertEqual(manifestFilename, dbPath+"MANIFEST-"+filenumber)
+            self.assertEqual(manifestFilename, dbPath + "MANIFEST-" + filenumber)
 
         # Check that the blob file index is decoded.
         decodedBlobIndex = re.findall(r"\[blob ref\]", data)
         self.assertTrue(len(decodedBlobIndex) >= 1)
 
     def listLiveFilesMetadata(self, params, dumpFile):
-        return 0 == run_err_null("./ldb list_live_files_metadata %s > %s" % (
-            params, dumpFile))
+        return 0 == run_err_null(
+            "./ldb list_live_files_metadata %s > %s" % (params, dumpFile)
+        )
 
     def testListLiveFilesMetadata(self):
         print("Running testListLiveFilesMetadata...")
@@ -554,23 +636,27 @@ class LDBTestCase(unittest.TestCase):
         dumpFilePath1 = os.path.join(self.TMP_DIR, "dump1")
         self.assertTrue(self.dumpLiveFiles("--db=%s" % dbPath, dumpFilePath1))
         dumpFilePath2 = os.path.join(self.TMP_DIR, "dump2")
-        self.assertTrue(self.listLiveFilesMetadata("--sort_by_filename --db=%s" % dbPath, dumpFilePath2))
+        self.assertTrue(
+            self.listLiveFilesMetadata(
+                "--sort_by_filename --db=%s" % dbPath, dumpFilePath2
+            )
+        )
 
         # Collect SST filename and level from dump_live_files
         with open(dumpFilePath1, "r") as tmp:
             data = tmp.read()
-            filename1 = re.findall(r".*\d+\.sst",data)[0]
-            level1 = re.findall(r"level:\d+",data)[0].split(':')[1]
+            filename1 = re.findall(r".*\d+\.sst", data)[0]
+            level1 = re.findall(r"level:\d+", data)[0].split(":")[1]
 
         # Collect SST filename and level from list_live_files_metadata
         with open(dumpFilePath2, "r") as tmp:
             data = tmp.read()
-            filename2 = re.findall(r".*\d+\.sst",data)[0]
-            level2 = re.findall(r"level \d+",data)[0].split(' ')[1]
+            filename2 = re.findall(r".*\d+\.sst", data)[0]
+            level2 = re.findall(r"level \d+", data)[0].split(" ")[1]
 
         # Assert equality between filenames and levels.
-        self.assertEqual(filename1,filename2)
-        self.assertEqual(level1,level2)
+        self.assertEqual(filename1, filename2)
+        self.assertEqual(level1, level2)
 
         # Create multiple column families and compare the output
         # of list_live_files_metadata with dump_live_files once again.
@@ -586,7 +672,11 @@ class LDBTestCase(unittest.TestCase):
         dumpFilePath3 = os.path.join(self.TMP_DIR, "dump3")
         self.assertTrue(self.dumpLiveFiles("--db=%s" % dbPath, dumpFilePath3))
         dumpFilePath4 = os.path.join(self.TMP_DIR, "dump4")
-        self.assertTrue(self.listLiveFilesMetadata("--sort_by_filename --db=%s" % dbPath, dumpFilePath4))
+        self.assertTrue(
+            self.listLiveFilesMetadata(
+                "--sort_by_filename --db=%s" % dbPath, dumpFilePath4
+            )
+        )
 
         # dump_live_files:
         # parse the output and create a map:
@@ -601,7 +691,7 @@ class LDBTestCase(unittest.TestCase):
             # re.findall should not reorder the data.
             # Therefore namesAndLevels[i] matches the data from cfs[i].
             for count, nameAndLevel in enumerate(namesAndLevels):
-                sstFilename = re.findall(r"\d+.sst",nameAndLevel)[0]
+                sstFilename = re.findall(r"\d+.sst", nameAndLevel)[0]
                 sstLevel = re.findall(r"(?<=level:)\d+", nameAndLevel)[0]
                 cf = cfs[count]
                 referenceMap[sstFilename] = [sstLevel, cf]
@@ -618,13 +708,13 @@ class LDBTestCase(unittest.TestCase):
             sstLines = re.findall(r".*\d+.sst.*", data)
             for line in sstLines:
                 sstFilename = re.findall(r"\d+.sst", line)[0]
-                sstLevel = re.findall(r"(?<=level )\d+",line)[0]
-                cf = re.findall(r"(?<=column family \')\w+(?=\')",line)[0]
+                sstLevel = re.findall(r"(?<=level )\d+", line)[0]
+                cf = re.findall(r"(?<=column family \')\w+(?=\')", line)[0]
                 testMap[sstFilename] = [sstLevel, cf]
 
         # Compare the map obtained from dump_live_files and the map
         # obtained from list_live_files_metadata. Everything should match.
-        self.assertEqual(referenceMap,testMap)
+        self.assertEqual(referenceMap, testMap)
 
     def getManifests(self, directory):
         return glob.glob(directory + "/MANIFEST-*")
@@ -657,25 +747,30 @@ class LDBTestCase(unittest.TestCase):
         manifest_files = self.getManifests(dbPath)
         self.assertTrue(len(manifest_files) == 1)
         # Test with the default manifest file in dbPath.
-        self.assertRunOKFull(cmd % dbPath, expected_pattern,
-                             unexpected=False, isPattern=True)
+        self.assertRunOKFull(
+            cmd % dbPath, expected_pattern, unexpected=False, isPattern=True
+        )
         self.copyManifests(manifest_files[0], manifest_files[0] + "1")
         manifest_files = self.getManifests(dbPath)
         self.assertTrue(len(manifest_files) == 2)
         # Test with multiple manifest files in dbPath.
         self.assertRunFAILFull(cmd % dbPath)
         # Running it with the copy we just created should pass.
-        self.assertRunOKFull((cmd + " --path=%s")
-                             % (dbPath, manifest_files[1]),
-                             expected_pattern, unexpected=False,
-                             isPattern=True)
+        self.assertRunOKFull(
+            (cmd + " --path=%s") % (dbPath, manifest_files[1]),
+            expected_pattern,
+            unexpected=False,
+            isPattern=True,
+        )
         # Make sure that using the dump with --path will result in identical
         # output as just using manifest_dump.
         cmd = "dump --path=%s"
-        self.assertRunOKFull((cmd)
-                             % (manifest_files[1]),
-                             expected_pattern, unexpected=False,
-                             isPattern=True)
+        self.assertRunOKFull(
+            (cmd) % (manifest_files[1]),
+            expected_pattern,
+            unexpected=False,
+            isPattern=True,
+        )
 
         # Check if null characters doesn't infer with output format.
         self.assertRunOK("put a1 b1", "OK")
@@ -696,11 +791,14 @@ class LDBTestCase(unittest.TestCase):
         # Also note that 0x72=r and 0x4f=O, hence the regex \'r.{2}O\'
         # (we cannot use null character in the subprocess input either,
         # so we have to use '.{2}')
-        cmd_verbose = "manifest_dump --verbose --db=%s | grep -aq $'\'r.{2}O\'' && echo 'matched' || echo 'not matched'" %dbPath
-
-        self.assertRunOKFull(cmd_verbose , expected_verbose_output,
-                             unexpected=False, isPattern=True)
+        cmd_verbose = (
+            "manifest_dump --verbose --db=%s | grep -aq $''r.{2}O'' && echo 'matched' || echo 'not matched'"
+            % dbPath
+        )
 
+        self.assertRunOKFull(
+            cmd_verbose, expected_verbose_output, unexpected=False, isPattern=True
+        )
 
     def testGetProperty(self):
         print("Running testGetProperty...")
@@ -709,16 +807,15 @@ class LDBTestCase(unittest.TestCase):
         self.assertRunOK("put 2 2", "OK")
         # A "string" property
         cmd = "--db=%s get_property rocksdb.estimate-num-keys"
-        self.assertRunOKFull(cmd % dbPath,
-                             "rocksdb.estimate-num-keys: 2")
+        self.assertRunOKFull(cmd % dbPath, "rocksdb.estimate-num-keys: 2")
         # A "map" property
         # FIXME: why doesn't this pick up two entries?
         cmd = "--db=%s get_property rocksdb.aggregated-table-properties"
         part = "rocksdb.aggregated-table-properties.num_entries: "
         expected_pattern = re.compile(part)
-        self.assertRunOKFull(cmd % dbPath,
-                             expected_pattern, unexpected=False,
-                             isPattern=True)
+        self.assertRunOKFull(
+            cmd % dbPath, expected_pattern, unexpected=False, isPattern=True
+        )
         # An invalid property
         cmd = "--db=%s get_property rocksdb.this-property-does-not-exist"
         self.assertRunFAILFull(cmd % dbPath)
@@ -738,27 +835,27 @@ class LDBTestCase(unittest.TestCase):
         sst_files = self.getSSTFiles(dbPath)
         self.assertTrue(len(sst_files) >= 1)
         cmd = "dump --path=%s --decode_blob_index"
-        self.assertRunOKFull((cmd)
-                             % (sst_files[0]),
-                             expected_pattern, unexpected=False,
-                             isPattern=True)
+        self.assertRunOKFull(
+            (cmd) % (sst_files[0]), expected_pattern, unexpected=False, isPattern=True
+        )
 
     def testBlobDump(self):
         print("Running testBlobDump")
         dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)
         self.assertRunOK("batchput x1 y1 --create_if_missing --enable_blob_files", "OK")
-        self.assertRunOK("batchput --enable_blob_files x2 y2 x3 y3 \"x4 abc\" \"y4 xyz\"", "OK")
+        self.assertRunOK(
+            'batchput --enable_blob_files x2 y2 x3 y3 "x4 abc" "y4 xyz"', "OK"
+        )
 
         # Pattern to expect from blob file dump.
-        regex = ".*Blob log header[\s\S]*Blob log footer[\s\S]*Read record[\s\S]*Summary"
+        regex = ".*Blob log header[\s\S]*Blob log footer[\s\S]*Read record[\s\S]*Summary"  # noqa
         expected_pattern = re.compile(regex)
         blob_files = self.getBlobFiles(dbPath)
         self.assertTrue(len(blob_files) >= 1)
         cmd = "dump --path=%s --dump_uncompressed_blobs"
-        self.assertRunOKFull((cmd)
-                             % (blob_files[0]),
-                             expected_pattern, unexpected=False,
-                             isPattern=True)
+        self.assertRunOKFull(
+            (cmd) % (blob_files[0]), expected_pattern, unexpected=False, isPattern=True
+        )
 
     def testWALDump(self):
         print("Running testWALDump...")
@@ -775,15 +872,14 @@ class LDBTestCase(unittest.TestCase):
         wal_files = self.getWALFiles(dbPath)
         self.assertTrue(len(wal_files) >= 1)
         cmd = "dump --path=%s"
-        self.assertRunOKFull((cmd)
-                             % (wal_files[0]),
-                             expected_pattern, unexpected=False,
-                             isPattern=True)
+        self.assertRunOKFull(
+            (cmd) % (wal_files[0]), expected_pattern, unexpected=False, isPattern=True
+        )
 
     def testListColumnFamilies(self):
         print("Running testListColumnFamilies...")
         self.assertRunOK("put x1 y1 --create_if_missing", "OK")
-        cmd = "list_column_families | grep -v \"Column families\""
+        cmd = 'list_column_families | grep -v "Column families"'
         # Test on valid dbPath.
         self.assertRunOK(cmd, "{default}")
         # Test on empty path.
@@ -791,34 +887,28 @@ class LDBTestCase(unittest.TestCase):
 
     def testColumnFamilies(self):
         print("Running testColumnFamilies...")
-        dbPath = os.path.join(self.TMP_DIR, self.DB_NAME)  # noqa: F841 T25377293 Grandfathered in
+        _ = os.path.join(self.TMP_DIR, self.DB_NAME)
         self.assertRunOK("put cf1_1 1 --create_if_missing", "OK")
         self.assertRunOK("put cf1_2 2 --create_if_missing", "OK")
         self.assertRunOK("put cf1_3 3 --try_load_options", "OK")
         # Given non-default column family to single CF DB.
         self.assertRunFAIL("get cf1_1 --column_family=two")
         self.assertRunOK("create_column_family two", "OK")
-        self.assertRunOK("put cf2_1 1 --create_if_missing --column_family=two",
-                         "OK")
-        self.assertRunOK("put cf2_2 2 --create_if_missing --column_family=two",
-                         "OK")
+        self.assertRunOK("put cf2_1 1 --create_if_missing --column_family=two", "OK")
+        self.assertRunOK("put cf2_2 2 --create_if_missing --column_family=two", "OK")
         self.assertRunOK("delete cf1_2", "OK")
         self.assertRunOK("create_column_family three", "OK")
         self.assertRunOK("delete cf2_2 --column_family=two", "OK")
-        self.assertRunOK(
-            "put cf3_1 3 --create_if_missing --column_family=three",
-            "OK")
+        self.assertRunOK("put cf3_1 3 --create_if_missing --column_family=three", "OK")
         self.assertRunOK("get cf1_1 --column_family=default", "1")
-        self.assertRunOK("dump --column_family=two",
-                         "cf2_1 ==> 1\nKeys in range: 1")
-        self.assertRunOK("dump --column_family=two --try_load_options",
-                         "cf2_1 ==> 1\nKeys in range: 1")
-        self.assertRunOK("dump",
-                         "cf1_1 ==> 1\ncf1_3 ==> 3\nKeys in range: 2")
-        self.assertRunOK("get cf2_1 --column_family=two",
-                         "1")
-        self.assertRunOK("get cf3_1 --column_family=three",
-                         "3")
+        self.assertRunOK("dump --column_family=two", "cf2_1 ==> 1\nKeys in range: 1")
+        self.assertRunOK(
+            "dump --column_family=two --try_load_options",
+            "cf2_1 ==> 1\nKeys in range: 1",
+        )
+        self.assertRunOK("dump", "cf1_1 ==> 1\ncf1_3 ==> 3\nKeys in range: 2")
+        self.assertRunOK("get cf2_1 --column_family=two", "1")
+        self.assertRunOK("get cf3_1 --column_family=three", "3")
         self.assertRunOK("drop_column_family three", "OK")
         # non-existing column family.
         self.assertRunFAIL("get cf3_1 --column_family=four")
@@ -830,32 +920,36 @@ class LDBTestCase(unittest.TestCase):
         # Dump, load, write external sst and ingest it in another db
         dbPath = os.path.join(self.TMP_DIR, "db1")
         self.assertRunOK(
-            "batchput --db=%s --create_if_missing x1 y1 x2 y2 x3 y3 x4 y4"
-            % dbPath,
-            "OK")
-        self.assertRunOK("scan --db=%s" % dbPath,
-                         "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
+            "batchput --db=%s --create_if_missing x1 y1 x2 y2 x3 y3 x4 y4" % dbPath,
+            "OK",
+        )
+        self.assertRunOK("scan --db=%s" % dbPath, "x1 : y1\nx2 : y2\nx3 : y3\nx4 : y4")
         dumpFilePath = os.path.join(self.TMP_DIR, "dump1")
-        with open(dumpFilePath, 'w') as f:
+        with open(dumpFilePath, "w") as f:
             f.write("x1 ==> y10\nx2 ==> y20\nx3 ==> y30\nx4 ==> y40")
         externSstPath = os.path.join(self.TMP_DIR, "extern_data1.sst")
-        self.assertTrue(self.writeExternSst("--create_if_missing --db=%s"
-                            % dbPath,
-                        dumpFilePath,
-                        externSstPath))
+        self.assertTrue(
+            self.writeExternSst(
+                "--create_if_missing --db=%s" % dbPath, dumpFilePath, externSstPath
+            )
+        )
         # cannot ingest if allow_global_seqno is false
         self.assertFalse(
             self.ingestExternSst(
-                "--create_if_missing --allow_global_seqno=false --db=%s"
-                % dbPath,
-                externSstPath))
+                "--create_if_missing --allow_global_seqno=false --db=%s" % dbPath,
+                externSstPath,
+            )
+        )
         self.assertTrue(
             self.ingestExternSst(
-                "--create_if_missing --allow_global_seqno --db=%s"
-                % dbPath,
-                externSstPath))
-        self.assertRunOKFull("scan --db=%s" % dbPath,
-                             "x1 : y10\nx2 : y20\nx3 : y30\nx4 : y40")
+                "--create_if_missing --allow_global_seqno --db=%s" % dbPath,
+                externSstPath,
+            )
+        )
+        self.assertRunOKFull(
+            "scan --db=%s" % dbPath, "x1 : y10\nx2 : y20\nx3 : y30\nx4 : y40"
+        )
+
 
 if __name__ == "__main__":
     unittest.main()

tools/write_stress_runner.py

@@ -2,11 +2,12 @@
 # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 from __future__ import absolute_import, division, print_function, unicode_literals
 
-import subprocess
 import argparse
 import random
-import time
+
+import subprocess
 import sys
+import time
 
 
 def generate_runtimes(total_runtime):
@@ -24,31 +25,33 @@ def generate_runtimes(total_runtime):
 
 def main(args):
     runtimes = generate_runtimes(int(args.runtime_sec))
-    print("Going to execute write stress for " + str(runtimes))  # noqa: E999 T25377293 Grandfathered in
+    print(
+        "Going to execute write stress for " + str(runtimes)
+    )  # noqa: E999 T25377293 Grandfathered in
     first_time = True
 
     for runtime in runtimes:
         kill = random.choice([False, True])
 
-        cmd = './write_stress --runtime_sec=' + \
-            ("-1" if kill else str(runtime))
+        cmd = "./write_stress --runtime_sec=" + ("-1" if kill else str(runtime))
 
         if len(args.db) > 0:
-            cmd = cmd + ' --db=' + args.db
+            cmd = cmd + " --db=" + args.db
 
         if first_time:
             first_time = False
         else:
             # use current db
-            cmd = cmd + ' --destroy_db=false'
+            cmd = cmd + " --destroy_db=false"
         if random.choice([False, True]):
-            cmd = cmd + ' --delete_obsolete_files_with_fullscan=true'
+            cmd = cmd + " --delete_obsolete_files_with_fullscan=true"
         if random.choice([False, True]):
-            cmd = cmd + ' --low_open_files_mode=true'
+            cmd = cmd + " --low_open_files_mode=true"
 
-        print("Running write_stress for %d seconds (%s): %s" %
-              (runtime, ("kill-mode" if kill else "clean-shutdown-mode"),
-              cmd))
+        print(
+            "Running write_stress for %d seconds (%s): %s"
+            % (runtime, ("kill-mode" if kill else "clean-shutdown-mode"), cmd)
+        )
 
         child = subprocess.Popen([cmd], shell=True)
         killtime = time.time() + runtime
@@ -58,19 +61,23 @@ def main(args):
                 if child.returncode == 0:
                     break
                 else:
-                    print("ERROR: write_stress died with exitcode=%d\n"
-                          % child.returncode)
+                    print(
+                        "ERROR: write_stress died with exitcode=%d\n" % child.returncode
+                    )
                     sys.exit(1)
         if kill:
             child.kill()
         # breathe
         time.sleep(3)
 
-if __name__ == '__main__':
+
+if __name__ == "__main__":
     random.seed(time.time())
-    parser = argparse.ArgumentParser(description="This script runs and kills \
-        write_stress multiple times")
-    parser.add_argument("--runtime_sec", default='1000')
-    parser.add_argument("--db", default='')
+    parser = argparse.ArgumentParser(
+        description="This script runs and kills \
+        write_stress multiple times"
+    )
+    parser.add_argument("--runtime_sec", default="1000")
+    parser.add_argument("--db", default="")
     args = parser.parse_args()
     main(args)