Sourced from pyo3's releases.

PyO3 0.19.1

This release fixes a memory leak caused by a reference counting error which affected PySet::new, PyFrozenSet::new and conversions from Rust set types to Python's set.

There are several other notable quality-of-life changes in this release:

• Support for PyPy 3.10.
• Support for hashbrown 0.14 and indexmap 2.0.
• Conversions for std::net::IpAddr have been added.
• The num-bigint feature is now supported with the abi3 feature.
• The num-complex feature with abi3 feature enabled will now correctly use __complex__ implementations (it always has without abi3 enabled).
• #[new] methods can now return Py<Self> to return an existing object (e.g. for singleton classes).

There are also a handful of other additions and bugfixes included in this release.

Thank you to the following users for the improvements:

@​adamreichold @​adriangb @​alex @​CallMeMSL @​davidhewitt @​ijl @​jakelishman @​lucatrv @​mejrs @​mhils @​youknowone

Sourced from pyo3's changelog.

[0.19.1] - 2023-07-03

Packaging

• Extend range of supported versions of hashbrown optional dependency to include version 0.14 #3258
• Extend range of supported versions of indexmap optional dependency to include version 2. #3277
• Support PyPy 3.10. #3289

Added

• Add pyo3::types::PyFrozenSetBuilder to allow building a PyFrozenSet item by item. #3156
• Add support for converting to and from Python's ipaddress.IPv4Address/ipaddress.IPv6Address and std::net::IpAddr. #3197
• Add support for num-bigint feature in combination with abi3. #3198
• Add PyErr_GetRaisedException(), PyErr_SetRaisedException() to FFI definitions for Python 3.12 and later. #3248
• Add Python::with_pool which is a safer but more limited alternative to Python::new_pool. #3263
• Add PyDict::get_item_with_error on PyPy. #3270
• Allow #[new] methods may to return Py<Self> in order to return existing instances. #3287

Fixed

• Fix conversion of classes implementing __complex__ to Complex when using abi3 or PyPy. #3185
• Stop suppressing unrelated exceptions in PyAny::hasattr. #3271
• Fix memory leak when creating PySet or PyFrozenSet or returning types converted into these internally, e.g. HashSet or BTreeSet. #3286

• dfe04e9 release: 0.19.1
• 7b2d627 workaround msrv lint issue
• 5fb41a4 fixup minimal package versions for msrv
• 9151c96 support PyPy 3.10
• 9f9be35 Allow #[new] to return existing instances
• 1812274 Apparently, PySet_Add does not steal a reference, hence we should not forget ...
• efea50b clarify ownership of opt_to_pyobj helper function
• 710a2dc Fix typos and add punctuation recommended by grammarly in Class.md
• 0ba07db use _run_cargo helper in noxfile
• cd33b1c move pyo3-ffi-check into its own workspace
• Additional commits viewable in compare view

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