From 4f91581bee3c8659980ad4b0a6593af58e3b3016 Mon Sep 17 00:00:00 2001
From: Agustin Borgna <agustin.borgna@quantinuum.com>
Date: Thu, 4 Apr 2024 15:21:43 +0100
Subject: [PATCH] chore!: Update pyo3 to 0.21

---
 Cargo.toml    |  4 ++--
 README.md     |  2 +-
 src/pytket.rs | 12 ++++++------
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 2fd65a0..c60adbe 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,8 +20,8 @@ name = "tket_json_rs"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 uuid = { version = "1.4", features = ["serde"] }
-pyo3 = { version = "0.20.0", optional = true }
-pythonize = { version = "0.20.0", optional = true }
+pyo3 = { version = "0.21.1", optional = true }
+pythonize = { version = "0.21.1", optional = true }
 
 
 [features]
diff --git a/README.md b/README.md
index 79edbff..207af09 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ Serializable Rust definition for circuits and operations of the
 
 ## Features
 
--   `pyo3`: Enable Python bindings via pyo3.
+-   `pyo3`: Enable Python bindings and `pytket.Circuit` conversion via pyo3.
 
 ## Recent Changes
 
diff --git a/src/pytket.rs b/src/pytket.rs
index df56c68..8486248 100644
--- a/src/pytket.rs
+++ b/src/pytket.rs
@@ -2,12 +2,12 @@
 
 use crate::circuit_json::SerialCircuit;
 use pyo3::prelude::*;
-use pythonize::{depythonize, pythonize};
+use pythonize::{depythonize_bound, pythonize};
 
 impl SerialCircuit {
     /// Create a new `SerialCircuit` from a `pytket.Circuit`.
-    pub fn from_tket1(circ: &PyAny) -> PyResult<Self> {
-        let circ = depythonize(circ.call_method0("to_dict").unwrap())?;
+    pub fn from_tket1(circ: &Bound<PyAny>) -> PyResult<Self> {
+        let circ = depythonize_bound(circ.call_method0("to_dict").unwrap())?;
         Ok(circ)
     }
 
@@ -15,13 +15,13 @@ impl SerialCircuit {
     ///
     /// Utility function that calls [`SerialCircuit::from_tket1`] after acquiring the GIL.
     pub fn from_tket1_with_gil(circ: Py<PyAny>) -> PyResult<Self> {
-        Python::with_gil(|py| Self::from_tket1(circ.as_ref(py)))
+        Python::with_gil(|py| Self::from_tket1(circ.bind(py)))
     }
 
     /// Convert a `SerialCircuit` to a `pytket.Circuit`.
-    pub fn to_tket1<'py>(&self, py: Python<'py>) -> PyResult<&'py PyAny> {
+    pub fn to_tket1<'py>(&self, py: Python<'py>) -> PyResult<Bound<'py, PyAny>> {
         let dict = pythonize(py, self).unwrap();
-        let circ_module = PyModule::import(py, "pytket.circuit")?;
+        let circ_module = PyModule::import_bound(py, "pytket.circuit")?;
 
         circ_module
             .getattr("Circuit")?