Sourced from pyo3's releases.

v0.24.1

This release is a security fix for the PyString::from_object method, which passed &str data to the Python C API without checking for a terminating nul byte. All historical PyO3 versions are affected, and we recommend you upgrade if you are using PyString::from_object. Thank you to @​vthib for the report and @​Dr-Emann for the fix. A RUSTSEC advisory will be published shortly.

Aside from the security fix, this release contains a number of other non-breaking additions:

• An abi3-py313 feature to support compiling with the Python 3.13 stable ABI.
• PyAnyMethods::getattr_opt to get optional attributes without paying the cost of a Python exception when the attribute in question does not exist.
• Constructor for PyInt::new.
• with_critical_section2 for locking two objects at the same time on the free-threaded build.
• Fix for a PyO3 0.24.0 regression with Option<&str> and Option<&T> (where T: PyClass) function arguments no longer being permitted

There are also a few other small bug fixes for edge cases, mostly related to compile errors from PyO3's macro code.

Thank you to the following contributors for the improvements:

@​bschoenmaeckers @​davidhewitt @​Dr-Emann @​emmagordon @​epontan @​Icxolu @​IvanIsCoding @​jelmer @​jonaspleyer @​ngoldbaum @​Owen-CH-Leung @​Tpt @​Trolldemorted @​XuehaiPan

Sourced from pyo3's changelog.

[0.24.1] - 2025-03-31

Added

• Add abi3-py313 feature. #4969
• Add PyAnyMethods::getattr_opt. #4978
• Add PyInt::new constructor for all supported number types (i32, u32, i64, u64, isize, usize). #4984
• Add pyo3::sync::with_critical_section2. #4992
• Implement PyCallArgs for Borrowed<'_, 'py, PyTuple>, &Bound<'py, PyTuple>, and &Py<PyTuple>. #5013

Fixed

• Fix is_type_of for native types not using same specialized check as is_type_of_bound. #4981
• Fix Probe class naming issue with #[pymethods]. #4988
• Fix compile failure with required #[pyfunction] arguments taking Option<&str> and Option<&T> (for #[pyclass] types). #5002
• Fix PyString::from_object causing of bounds reads whith encoding and errors parameters which are not nul-terminated. #5008
• Fix compile error when additional options follow after crate for #[pyfunction]. #5015

• a213b36 release: 0.24.1 (#5021)
• d85a02d split PyFunctionArgument to specialize Option (#5002)
• c37a50a Add example of more complex exceptions (#5014)
• dcacb9b Simplify PyFunctionArgument impl on &Bound<T> (#5018)
• 03c31c5 fix #[pyfunction] option parsing (#5015)
• 0f49eb1 docs: Remove examples with outdated PyO3 and unmaintained projects (#4952)
• 1b00b0d implement PyCallArgs for borrowed types (#5013)
• 5caaa37 fix: convert to cstrings in PyString::from_object (#5008)
• 4aca459 docs: guide - add link to tables and traits (#5001)
• 0452c0e replace quansight-labs/setup-python with actions/setup-python (#5007)
• Additional commits viewable in compare view

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