diff --git a/Cargo.lock b/Cargo.lock
index ed0a9bf8..2775856f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1004,13 +1004,14 @@ dependencies = [
 
 [[package]]
 name = "pyo3"
-version = "0.16.6"
+version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0220c44442c9b239dd4357aa856ac468a4f5e1f0df19ddb89b2522952eb4c6ca"
+checksum = "12f72538a0230791398a0986a6518ebd88abc3fded89007b506ed072acc831e1"
 dependencies = [
  "cfg-if",
  "indoc",
  "libc",
+ "memoffset",
  "parking_lot",
  "pyo3-build-config",
  "pyo3-ffi",
@@ -1020,9 +1021,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.16.6"
+version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c819d397859445928609d0ec5afc2da5204e0d0f73d6bf9e153b04e83c9cdc2"
+checksum = "fc4cf18c20f4f09995f3554e6bcf9b09bd5e4d6b67c562fdfaafa644526ba479"
 dependencies = [
  "once_cell",
  "target-lexicon",
@@ -1030,9 +1031,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-ffi"
-version = "0.16.6"
+version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca882703ab55f54702d7bfe1189b41b0af10272389f04cae38fe4cd56c65f75f"
+checksum = "a41877f28d8ebd600b6aa21a17b40c3b0fc4dfe73a27b6e81ab3d895e401b0e9"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -1040,9 +1041,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros"
-version = "0.16.6"
+version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "568749402955ad7be7bad9a09b8593851cd36e549ac90bfd44079cea500f3f21"
+checksum = "2e81c8d4bcc2f216dc1b665412df35e46d12ee8d3d046b381aad05f1fcf30547"
 dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
@@ -1052,9 +1053,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.16.6"
+version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "611f64e82d98f447787e82b8e7b0ebc681e1eb78fc1252668b2c605ffb4e1eb8"
+checksum = "85752a767ee19399a78272cc2ab625cd7d373b2e112b4b13db28de71fa892784"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/python/Cargo.toml b/python/Cargo.toml
index e0bbaadd..a9178356 100644
--- a/python/Cargo.toml
+++ b/python/Cargo.toml
@@ -17,4 +17,4 @@ doctest = false
 
 [dependencies]
 oxigraph = { version = "0.3.6", path="../lib", features = ["http_client"] }
-pyo3 = { version = "0.16", features = ["extension-module", "abi3-py37"] }
+pyo3 = { version = "0.17", features = ["extension-module", "abi3-py37"] }
diff --git a/python/src/io.rs b/python/src/io.rs
index da1c288f..645f94b5 100644
--- a/python/src/io.rs
+++ b/python/src/io.rs
@@ -286,37 +286,37 @@ pub(crate) struct PyIo(PyObject);
 
 impl Read for PyIo {
     fn read(&mut self, mut buf: &mut [u8]) -> io::Result<usize> {
-        let gil = Python::acquire_gil();
-        let py = gil.python();
-        let read = self
-            .0
-            .call_method(py, "read", (buf.len(),), None)
-            .map_err(to_io_err)?;
-        let bytes = read
-            .extract::<&[u8]>(py)
-            .or_else(|e| read.extract::<&str>(py).map(|s| s.as_bytes()).or(Err(e)))
-            .map_err(to_io_err)?;
-        buf.write_all(bytes)?;
-        Ok(bytes.len())
+        Python::with_gil(|py| {
+            let read = self
+                .0
+                .call_method(py, "read", (buf.len(),), None)
+                .map_err(to_io_err)?;
+            let bytes = read
+                .extract::<&[u8]>(py)
+                .or_else(|e| read.extract::<&str>(py).map(|s| s.as_bytes()).or(Err(e)))
+                .map_err(to_io_err)?;
+            buf.write_all(bytes)?;
+            Ok(bytes.len())
+        })
     }
 }
 
 impl Write for PyIo {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        let gil = Python::acquire_gil();
-        let py = gil.python();
-        self.0
-            .call_method(py, "write", (PyBytes::new(py, buf),), None)
-            .map_err(to_io_err)?
-            .extract::<usize>(py)
-            .map_err(to_io_err)
+        Python::with_gil(|py| {
+            self.0
+                .call_method(py, "write", (PyBytes::new(py, buf),), None)
+                .map_err(to_io_err)?
+                .extract::<usize>(py)
+                .map_err(to_io_err)
+        })
     }
 
     fn flush(&mut self) -> io::Result<()> {
-        let gil = Python::acquire_gil();
-        let py = gil.python();
-        self.0.call_method(py, "flush", (), None)?;
-        Ok(())
+        Python::with_gil(|py| {
+            self.0.call_method(py, "flush", (), None)?;
+            Ok(())
+        })
     }
 }
 
diff --git a/python/src/model.rs b/python/src/model.rs
index 5bc38d10..89f8c8af 100644
--- a/python/src/model.rs
+++ b/python/src/model.rs
@@ -97,7 +97,7 @@ impl PyNamedNode {
 
     fn __richcmp__(&self, other: &PyAny, op: CompareOp) -> PyResult<bool> {
         if let Ok(other) = other.downcast::<PyCell<Self>>() {
-            Ok(eq_ord_compare(self, &other.borrow(), op))
+            Ok(op.matches(self.cmp(&other.borrow())))
         } else if PyBlankNode::is_type_of(other)
             || PyLiteral::is_type_of(other)
             || PyDefaultGraph::is_type_of(other)
@@ -831,9 +831,7 @@ impl PyQuad {
         4
     }
 
-    fn __getitem__(&self, input: usize) -> PyResult<PyObject> {
-        let gil = Python::acquire_gil();
-        let py = gil.python();
+    fn __getitem__(&self, input: usize, py: Python<'_>) -> PyResult<PyObject> {
         match input {
             0 => Ok(PySubject::from(self.inner.subject.clone()).into_py(py)),
             1 => Ok(PyNamedNode::from(self.inner.predicate.clone()).into_py(py)),
@@ -1126,17 +1124,6 @@ fn eq_compare_other_type(op: CompareOp) -> PyResult<bool> {
     }
 }
 
-fn eq_ord_compare<T: Eq + Ord>(a: &T, b: &T, op: CompareOp) -> bool {
-    match op {
-        CompareOp::Lt => a < b,
-        CompareOp::Le => a <= b,
-        CompareOp::Eq => a == b,
-        CompareOp::Ne => a != b,
-        CompareOp::Gt => a > b,
-        CompareOp::Ge => a >= b,
-    }
-}
-
 fn hash(t: &impl Hash) -> u64 {
     let mut s = DefaultHasher::new();
     t.hash(&mut s);