This patch release improves some cases related to new functionality in PyO3 0.22.
PartialEq<bool> has been added for Bound<'py, PyBool>.
The #[pyo3(submodule)] attribute has been added for declarative modules to stop submodules from generating an external C symbol for importing the submodule directly (which is typically never used). Declarative modules will also now correctly add items annotated with full-path attributes like #[pyo3::prelude::pyfunction].
The #[pyclass(eq)] option will no longer raise a TypeError on comparison against types not in the signature.
A #[setter] in #[pymethods] with an Option<T> input will no longer raise a deprecation warning.
A regression has been fixed in conversions for 128-bit integers on big-endian platforms.
Thank you to the following contributors for the improvements:
This release introduces support for Python 3.13. Please note that Python 3.13 is still in beta, and while breaking changes are not expected it is very possible that code compiled against Python 3.13 beta versions will be incompatible with the final 3.13 release later in the year.
The minimum supported Rust version has been increased to Rust 1.63.
PyO3's deferred reference counting used to implement Clone for Py<T> without the global interpreter lock has been demonstrated to be impossible to implement safely in the general case and has consequently been changed to panic instead of deferring when cloning Py<T> without the GIL being held. Given the nature of panics inside Clone operations being a potential footgun, this implementation has been moved behind the opt-in py-clone feature.
Other particularly notable changes include:
The #[pyclass] macro now has additional options #[pyclass(eq, ord, hash)] to automatically generate Python implementations for equality, ordering and hashing based upon the Rust PartialEq, PartialOrd and Hash traits. This can ensure consistency and reduce boilerplate compared to implementing __eq__, __hash__ and so on manually.
The experimental-declarative-modules feature to support #[pymodule] on Rust mod items has been stabilised (and the feature flag removed). The existing implementation of #[pymodule] on fn items is still present but soft-deprecated; in the future new features will likely be added only to declarative modules, and the fn modules may eventually be deprecated and removed.
The GIL Refs API deprecation started in PyO3 0.21 continues with all related APIs now being gated behind the gil-refs feature, and unconditionally deprecated. In PyO3 0.23 these APIs are expected to be removed.
There have been numerous other smaller improvements, changes and fixes. For full details see the CHANGELOG.
Thank you to everyone who contributed code, documentation, design ideas, bug reports, and feedback. The following contributors' commits are included in this release:
Add PyWeakref, PyWeakrefReference and PyWeakrefProxy. #3835
Support #[pyclass] on enums that have tuple variants. #4072
Add support for scientific notation in Decimal conversion. #4079
Add pyo3_disable_reference_pool conditional compilation flag to avoid the overhead of the global reference pool at the cost of known limitations as explained in the performance section of the guide. #4095
Add #[pyo3(constructor = (...))] to customize the generated constructors for complex enum variants. #4158
Add PyType::module, which always matches Python __module__. #4196
Add PyType::fully_qualified_name which matches the "fully qualified name" defined in PEP 737. #4196
Add PyTypeMethods::mro and PyTypeMethods::bases. #4197
Add #[pyclass(ord)] to implement ordering based on PartialOrd. #4202
Implement ToPyObject and IntoPy<PyObject> for PyBackedStr and PyBackedBytes. #4205
Add #[pyclass(hash)] option to implement __hash__ in terms of the Hash implementation #4206
Add #[pyclass(eq)] option to generate __eq__ based on PartialEq, and #[pyclass(eq_int)] for simple enums to implement equality based on their discriminants. #4210
Implement From<Bound<'py, T>> for PyClassInitializer<T>. #4214
Add as_super methods to PyRef and PyRefMut for accesing the base class by reference. #4219
Implement PartialEq<str> for Bound<'py, PyString>. #4245
Implement PyModuleMethods::filename on PyPy. #4249
Implement PartialEq<[u8]> for Bound<'py, PyBytes>. #4250
Add pyo3_ffi::c_str macro to create &'static CStr on Rust versions which don't have 1.77's c"" literals. #4255
Support bool conversion with numpy 2.0's numpy.bool type #4258
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Bumps pyo3-build-config from 0.21.2 to 0.22.1.
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Commits
59c4fa3
release: 0.22.1 (#4314)9afc38a
fixes #4285 -- allow full-path to pymodule with nested declarative modules (#...5860c4f
implement PartialEq for Pybool & bool (#4305)0af0227
fix deprecation warning for trailing optional on#[setter]
functions (#4304)ee9123a
Fix link in the contribution guide (#4306)ccd0447
refs #4286 -- allow setting submodule on declarative pymodules (#4301)f3603a0
Avoid generating functions that are only ever const evaluated with declarativ...872bd7e
Add pyo3-arrow to README (#4302)8f7450e
Fix 128-bit int regression on big-endian with Python <3.13 (#4291)7c2f5e8
Don't raiseTypeError
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