Sourced from pyo3's releases.

PyO3 0.25.0

This version extends Python version support to include the new Python 3.14, currently in beta. Please note it is possible that there may yet be changes to 3.14 before stable release which may impact final compatibility.

New optional dependencies on bigdecimal, ordered_float, and time have been added to permit converting types from those crates to Python types (and vice versa).

The experimental-inspect feature now has the capability to autogenerate type stubs. These stubs are still extremely basic and lack much information. Tooling such as setuptools-rust and maturin will also need to be updated to make adoption of these easier. Please follow PyO3/pyo3#5137 to keep abreast of developments of this feature.

The #[pyclass] macro has gained new options #[pyclass(generic)] and #[pyclass(immutable_type)] to offer additional control over the runtime behaviour of the generated Python type object.

The AsPyPointer trait has been removed as PyO3's smart pointer types such as Py<T>, Bound<T> and Borrowed<T> covered this use case with a better API.

As part of the upgrade to support 3.14, there have also been many cleanups to pyo3-ffi. Many definitions which are private implementation details of CPython have been removed; projects downstream of CPython cannot rely on stability of these even across CPython patch releases.

There are also many other incremental improvements, bug fixes and smaller features.

Please consult the migration guide for help upgrading.

Thank you to everyone who contributed code, documentation, design ideas, bug reports, and feedback. The following contributors' commits are included in this release:

@​0x676e67 @​bschoenmaeckers @​clin1234 @​davidbrochart @​davidhewitt @​ddelange @​decathorpe @​dependabot[bot] @​exg @​hgmich @​Icxolu @​IvanIsCoding @​m-ou-se @​n-eq @​ngoldbaum @​Owen-CH-Leung @​prutschman-iv @​superserious-dev @​Tpt @​trim21 @​Vrajs16 @​xhochy

PyO3 0.24.2

This is a small patch release containing minor bugfixes and documentation improvements, including an unused imports lint warning raised from inside PyO3's proc macros.

Thank you to the following contributors for the improvements:

@​davidbrochart @​davidhewitt @​ddelange

... (truncated)

Sourced from pyo3's changelog.

[0.25.0] - 2025-05-14

Packaging

• Support Python 3.14.0b1. #4811
• Bump supported GraalPy version to 24.2. #5116
• Add optional bigdecimal dependency to add conversions for bigdecimal::BigDecimal. #5011
• Add optional time dependency to add conversions for time types. #5057
• Remove cfg-if dependency. #5110
• Add optional ordered_float dependency to add conversions for ordered_float::NotNan and ordered_float::OrderedFloat. #5114

Added

• Add initial type stub generation to the experimental-inspect feature. #3977
• Add #[pyclass(generic)] option to support runtime generic typing. #4926
• Implement OnceExt & MutexExt for parking_lot & lock_api. Use the new extension traits by enabling the arc_lock, lock_api, or parking_lot cargo features. #5044
• Implement From/Into for Borrowed<T> -> Py<T>. #5054
• Add PyTzInfo constructors. #5055
• Add FFI definition PY_INVALID_STACK_EFFECT. #5064
• Implement AsRef<Py<PyAny>> for Py<T>, Bound<T> and Borrowed<T>. #5071
• Add FFI definition PyModule_Add and compat::PyModule_Add. #5085
• Add FFI definitions Py_HashBuffer, Py_HashPointer, and PyObject_GenericHash. #5086
• Support #[pymodule_export] on const items in declarative modules. #5096
• Add #[pyclass(immutable_type)] option (on Python 3.14+ with abi3, or 3.10+ otherwise) for immutable type objects. #5101
• Support #[pyo3(rename_all)] support on #[derive(IntoPyObject)]. #5112
• Add PyRange wrapper. #5117

Changed

• Enable use of datetime types with abi3 feature enabled. #4970
• Deprecate timezone_utc in favor of PyTzInfo::utc. #5055
• Reduce visibility of some CPython implementation details: #5064
  • The FFI definition PyCodeObject is now an opaque struct on all Python versions.
  • The FFI definition PyFutureFeatures is now only defined up until Python 3.10 (it was present in CPython headers but unused in 3.11 and 3.12).
• Change PyAnyMethods::is to take other: &Bound<T>. #5071
• Change Py::is to take other: &Py<T>. #5071
• Change PyVisit::call to take T: Into<Option<&Py<T>>>. #5071
• Expose PyDateTime_DATE_GET_TZINFO and PyDateTime_TIME_GET_TZINFO on PyPy 3.10 and later. #5079
• Add #[track_caller] to with_gil and with_gil_unchecked. #5109
• Use std::thread::park() instead of libc::pause() or sleep(9999999). #5115

Removed

• Remove all functionality deprecated in PyO3 0.23. #4982
• Remove deprecated IntoPy and ToPyObject traits. #5010
• Remove private types from pyo3-ffi (i.e. starting with _Py) which are not referenced by public APIs: _PyLocalMonitors, _Py_GlobalMonitors, _PyCoCached, _PyCoLineInstrumentationData, _PyCoMonitoringData, _PyCompilerSrcLocation, _PyErr_StackItem. #5064
• Remove FFI definition PyCode_GetNumFree (PyO3 cannot support it due to knowledge of the code object). #5064
• Remove AsPyPointer trait. #5071
• Remove support for the deprecated string form of from_py_with. #5097
• Remove FFI definitions of private static variables: _PyMethodWrapper_Type, _PyCoroWrapper_Type, _PyImport_FrozenBootstrap, _PyImport_FrozenStdlib, _PyImport_FrozenTest, _PyManagedBuffer_Type, _PySet_Dummy, _PyWeakref_ProxyType, and _PyWeakref_CallableProxyType. #5105

... (truncated)

• ec1a350 release: 0.25.0 (#5128)
• c4efb16 ci: reduce verbosity & install zoneinfo backport on <3.9 (#5136)
• b61dc7f add rename_all support for #[derive(IntoPyObject)] (#5112)
• d74fadc Implement OnceExt & MutexExt for parking_lot & lock_api (#5044)
• f87b286 Don't expose PyASCIIObjectState on Python3.14 and newer (#5133)
• b36849a more format args inlining (#5135)
• 5807d80 Add #[pyclass(generic)] (#4926)
• 283ba3f Fix clippy errors (#5134)
• 3a39844 Add PyRange wrapper (#5117)
• e613a79 Implement optional feature ordered-float for NotNan/OrderedFloat <-> Python...
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