[dependabot]

Bumps pyo3 from 0.29.3 to 0.30.1.

Release notes

Sourced from pyo3's releases.

PyO3 0.30.1 is a re-release of PyO3 0.30.0 after investments in CI security unfortunately led to a failed crates.io publish. Rather than delete the failed tag, this new tag comes after the CI issues have (hopefully) been corrected.

Thanks to @​davidhewitt @​Tpt and @​viicos for the investigation and fixes.

PyO3 0.30.0

This release brings confirmed testing against Python 3.15.0 final. Support for Python 3.8 has been dropped. The minimum supported Rust version has also been increased to 1.85.

The largest sets of improvements come to PyO3 0.29.0's experimental-inspect feature, which has received substantial feedback since 0.29.0 and subsequently has seen many refinements to improve the quality and coverage to the generated stubs. Thank you to everyone who has helped to continue to drive this feature towards completion.

New safe wrappers for PyFrozenDict (3.15+) and PyContext have been added.

PyO3 now contains meson build files, which should make it possible for projects using meson-python to more straightforwardly use Rust and PyO3 for additional components.

Additionally, a number of small optimizations have landed, including:

• simplifications to core implementations of PyAnyMethods,
• reduced overhead from PyO3's internal "reference pool" used to dispose of Py<T> values dropped when not attached to the interpreter,
• optimizations to num-bigint conversions, and
• better generated code from IntoPyObject and IntoPyObjectRef derives.

There are also many other incremental improvements, bug fixes and smaller features; full detail can be found in the CHANGELOG.

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:

@​adamgerhant-ai @​alex @​bschoenmaeckers @​charliermarsh @​chirizxc @​clin1234 @​davidhewitt @​dependabot[bot] @​dylanpulver @​elbaro @​exg @​florentinl @​FranciscoTGouveia @​Icxolu @​imfeh2 @​IvanIsCoding @​JMak-Security @​jonasdedden @​jorenham @​konstin @​latent-9 @​MatthieuDartiailh @​mattip @​mejrs @​msimacek

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Changelog

Sourced from pyo3's changelog.

[0.30.1] - 2026-10-14

Packaging

• Support PyPy 3.12. #6448

[0.30.0] - 2026-10-13

NB PyO3 0.30.0 failed to push to crates.io due to a CI issue, so 0.30.1 was prepared and pushed with minimal other changes other than confirming support for PyPy 3.12.

Packaging

• Drop support for Python 3.8. #6128
• Bump MSRV to 1.85. #6459
• Support meson-python as a build backend. #6483
• Bump minimum supported GraalPy version to 25.4. #6491
• Support Python 3.15.0 final. #6517

Added

• Add support for PyFrozenDict on 3.15+ #6174
• Add PyContext type. #6227
• experimental-inspect: classes which extend their base's instance layout are now decorated with disjoint_base in the generated stubs, as per PEP 800. #6362
• Add methods PyBuffer::as_slice_ptr and PyBuffer::as_fortran_slice_ptr. #6382
• Implement Copy for PyVisit. #6412
• Add non-poisoning variant of PyMutex #6437
• Add PyStringMethods::code_point_len. #6455
• FFI Definitions:
  • Add FFI definition PyThread_get_thread_ident. #6056
  • Add FFI definitions for PEP 731 (PyInitConfig). #6152
  • Add FFI definitions PyContext_AddWatcher and PyContext_ClearWatcher on Python 3.14+. #6204
  • Add FFI definitions for PEP 539 ("Thread-Specific Storage" API). #6262
  • Enable FFI definitions PyObject_GC_Track and PyObject_GC_UnTrack on PyPy. #6299
  • Add FFI definitions PyUnicode_DecodeMBCS, PyUnicode_DecodeMBCSStateful, PyUnicode_DecodeCodePagetateful, PyUnicode_AsMBCSString, PyUnicode_EncodeCodePage, and PyUnicode_Equal. #6349
  • Add FFI definitions PyFloat_Pack{2,4,8} and PyFloat_Unpack{2,4,8}. #6350
  • Add FFI definitions PyFunction_GET_CODE, PyFunction_GET_GLOBALS, PyFunction_GET_MODULE, PyFunction_GET_DEFAULTS, PyFunction_GET_KW_DEFAULTS, PyFunction_GET_CLOSURE, PyFunction_GET_ANNOTATIONS, PyClassMethod_Type, PyStaticMethod_Type, PyClassMethod_New, and PyStaticMethod_New. #6351

Changed

• Optimized num-bigint conversions on Python 3.14 and newer. #6144
• Change #[pyclass] to not emit FromPyObject implementation by default (this was previously deprecated). #6188
• Deprecate #[pyclass(skip_from_py_object)] option (as it is now the default). #6188
• Deprecate pyo3_build_config::PythonAbi::from_build_env in favor of pyo3_build_config::PythonAbi::from_stable_abi. #6192
• Change pyo3_build_config::InterpreterConfig::from_sysconfigdata to no longer select a target ABI based on the content of abi3 or abi3t cargo features (it will now always select a version-specific ABI). #6192
• Optimize PyO3's internal reference pool used for disposal of Py<T> values dropped when not attached to the Python interpreter. #6200
• experimental-inspect: Emit __all__ for complete modules in the type stubs. #6242
• Change PyBytes::new_with_writer to take &mut PyBytesWriter instead of &mut dyn Write. #6251
• Change #[pymodule_init] to allow functions which do not take a module argument (for experimental-inspect, such modules are not marked Incomplete). #6271
• Change #[pymodule_init] to optionally allow functions to take a Python<'_> marker. #6271

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Commits

• f168538 release: 0.30.1
• b3c7361 pyo3-introspection sdist: skip maturin license lookup (#6528)
• b564d8c ci: require Cargo.lock to be up to date during testing (#6522)
• bbd862c support PyPy 3.12 (#6448)
• 196ca35 release: 0.30.0 (#6493)
• d3befaa remove all functionality deprecated in PyO3 0.28 (#6519)
• 3ee4e56 experimental-inspect: emit __all__ in the generated stubs (#6242)
• 071edec test against 3.15 final (#6517)
• 4c68d9c internal: remove no longer needed non_local_definitions allows (#6508)
• 65c8c7d Add example building with meson-python (#6483)
• Additional commits viewable in compare view