Sourced from mypy's changelog.

Mypy Release Notes

Next Release

Remove Support for targeting Python 3.8

Mypy now requires --python-version 3.9 or greater. Support for only Python 3.8 is fully removed now. Given an unsupported version, mypy will default to the oldest supported one, currently 3.9.

This change is necessary because typeshed stopped supporting Python 3.8 after it reached its End of Life in October 2024.

Contributed by Marc Mueller (PR 19157, PR 19162).

Initial Support for Python 3.14

Mypy is now tested on 3.14 and mypyc works with 3.14.0b3 and later. Mypyc compiled wheels of mypy itself will be available for new versions after 3.14.0rc1 is released.

Note that not all new features might be supported just yet.

Contributed by Marc Mueller (PR 19164)

Deprecated Flag: --force-uppercase-builtins

Mypy only supports Python 3.9+. The --force-uppercase-builtins flag is now deprecated and a no-op. It will be removed in a future version.

Contributed by Marc Mueller (PR 19176)

Mypy 1.16

We’ve just uploaded mypy 1.16 to the Python Package Index (PyPI). Mypy is a static type checker for Python. This release includes new features and bug fixes. You can install it as follows:

python3 -m pip install -U mypy

You can read the full documentation for this release on Read the Docs.

Different Property Getter and Setter Types

Mypy now supports using different types for a property getter and setter:

class A:
    _value: int
@property

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... (truncated)

• 68b8fa0 Bump version to 1.16.1
• e253ede Single underscore is not a sunder (#19273)
• 9fb5ff6 Fix properties with setters after deleters (#19248)
• c20fd78 Handle assignment of bound methods in class bodies (#19233)
• c86480c Tighten metaclass call handling in protocols (#19191)
• cb3c6ec Fix crash on partial type used as context (#19216)
• c39f5e7 [mypyc] Fixing condition for handling user-defined del (#19188)
• 0a4f284 Fix crash on invalid property inside its own body (#19208)
• 9b079f6 Bump version to 1.16.1+dev
• 9e72e96 Update version to 1.16.0
• Additional commits viewable in compare view

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