Python: build against abi3 to support multiple Python versions

- Upgrade to pyo3 0.21 to enable timedelta for chrono
- Enable abi3 for multi-python support

api/python/Cargo.toml

@@ -21,7 +21,7 @@ crate-type = ["cdylib"]
 i-slint-backend-selector = { workspace = true }
 i-slint-core = { workspace = true }
 slint-interpreter = { workspace = true, features = ["default", "display-diagnostics", "internal"] }
-pyo3 = { version = "0.20.0", features = ["extension-module", "indexmap", "chrono"] }
+pyo3 = { version = "0.21.0", features = ["extension-module", "indexmap", "chrono", "abi3-py310"] }
 indexmap = { version = "2.1.0" }
 chrono = "0.4"
 spin_on = "0.1"

api/python/interpreter.rs

@@ -224,7 +224,7 @@ impl ComponentInstance {
         Ok(self.instance.get_property(name)?.into())
     }
 
-    fn set_property(&self, name: &str, value: &PyAny) -> PyResult<()> {
+    fn set_property(&self, name: &str, value: Bound<'_, PyAny>) -> PyResult<()> {
         let pv: PyValue = value.extract()?;
         Ok(self.instance.set_property(name, pv.0).map_err(|e| PySetPropertyError(e))?)
     }
@@ -241,7 +241,7 @@ impl ComponentInstance {
         &self,
         global_name: &str,
         prop_name: &str,
-        value: &PyAny,
+        value: Bound<'_, PyAny>,
     ) -> PyResult<()> {
         let pv: PyValue = value.extract()?;
         Ok(self
@@ -251,7 +251,7 @@ impl ComponentInstance {
     }
 
     #[pyo3(signature = (callback_name, *args))]
-    fn invoke(&self, callback_name: &str, args: &PyTuple) -> PyResult<PyValue> {
+    fn invoke(&self, callback_name: &str, args: Bound<'_, PyTuple>) -> PyResult<PyValue> {
         let mut rust_args = vec![];
         for arg in args.iter() {
             let pv: PyValue = arg.extract()?;
@@ -265,7 +265,7 @@ impl ComponentInstance {
         &self,
         global_name: &str,
         callback_name: &str,
-        args: &PyTuple,
+        args: Bound<'_, PyTuple>,
     ) -> PyResult<PyValue> {
         let mut rust_args = vec![];
         for arg in args.iter() {
@@ -339,8 +339,8 @@ impl GcVisibleCallbacks {
             let callables = callables.borrow();
             let callable = callables.get(&name).unwrap();
             Python::with_gil(|py| {
-                let py_args = PyTuple::new(py, args.iter().map(|v| PyValue(v.clone())));
-                let result = match callable.call(py, py_args, None) {
+                let py_args = PyTuple::new_bound(py, args.iter().map(|v| PyValue(v.clone())));
+                let result = match callable.call_bound(py, py_args, None) {
                     Ok(result) => result,
                     Err(err) => {
                         eprintln!(

api/python/lib.rs

@@ -23,7 +23,7 @@ fn quit_event_loop() -> Result<(), errors::PyEventLoopError> {
 use pyo3::prelude::*;
 
 #[pymodule]
-fn slint(_py: Python<'_>, m: &PyModule) -> PyResult<()> {
+fn slint(_py: Python<'_>, m: &Bound<'_, PyModule>) -> PyResult<()> {
     i_slint_backend_selector::with_platform(|_b| {
         // Nothing to do, just make sure a backend was created
         Ok(())

api/python/noxfile.py

@@ -3,7 +3,7 @@
 
 import nox
 
-@nox.session
+@nox.session(python="3.10")
 def python(session: nox.Session):
     session.env["MATURIN_PEP517_ARGS"] = "--profile=dev"
     session.install(".[dev]")

api/python/pyproject.toml

@@ -7,7 +7,8 @@ build-backend = "maturin"
 
 [project]
 name = "slint"
-version = "1.6.0a3"
+version = "1.6.0a4"
+requires-python = ">= 3.10"
 authors = [
     {name = "Slint Team", email = "info@slint.dev"},
 ]

api/python/value.rs

@@ -44,7 +44,7 @@ impl<'a> ToPyObject for PyValueRef<'a> {
             slint_interpreter::Value::Struct(structval) => structval
                 .iter()
                 .map(|(name, val)| (name.to_string().into_py(py), PyValueRef(val).into_py(py)))
-                .into_py_dict(py)
+                .into_py_dict_bound(py)
                 .into_py(py),
             slint_interpreter::Value::Brush(brush) => {
                 crate::brush::PyBrush::from(brush.clone()).into_py(py)