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Mypy Release Notes

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Stubgen will now include __all__ in its output if it is in the input file (PR 16356).

Mypy 1.7

We’ve just uploaded mypy 1.7 to the Python Package Index (PyPI). Mypy is a static type checker for Python. This release includes new features, performance improvements 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.

Using TypedDict for **kwargs Typing

Mypy now has support for using Unpack[...] with a TypedDict type to annotate **kwargs arguments enabled by default. Example:

# Or 'from typing_extensions import ...'
from typing import TypedDict, Unpack
class Person(TypedDict):
name: str
age: int
def foo(**kwargs: Unpack[Person]) -> None:
...
foo(name="x", age=1)  # Ok
foo(name=1)  # Error

The definition of foo above is equivalent to the one below, with keyword-only arguments name and age:

def foo(*, name: str, age: int) -> None:
    ...

Refer to PEP 692 for more information. Note that unlike in the current version of the PEP, mypy always treats signatures with Unpack[SomeTypedDict] as equivalent to their expanded forms with explicit keyword arguments, and there aren't special type checking rules for TypedDict arguments.

This was contributed by Ivan Levkivskyi back in 2022 (PR 13471).

TypeVarTuple Support Enabled (Experimental)

Mypy now has support for variadic generics (TypeVarTuple) enabled by default, as an experimental feature. Refer to PEP 646 for the details.

TypeVarTuple was implemented by Jared Hance and Ivan Levkivskyi over several mypy releases, with help from Jukka Lehtosalo.

... (truncated)

• f6b9972 Remove +dev from version
• 62bcae2 Fix handling of tuple type context with unpacks (#16444)
• c22294a Handle TypeVarTupleType when checking overload constraints (#16428)
• 8813968 Fix type narrowing in lambda expressions (#16407)
• 681e54c Fix crash on unpack call special-casing (#16381)
• f68f463 Fix file reloading in dmypy with --export-types (#16359)
• 5624f40 Fix daemon crash caused by deleted submodule (#16370)
• ad0e183 Enable Unpack/TypeVarTuple support (#16354)
• b064a5c Fix dmypy inspect on Windows (#16355)
• 4e30e89 Fix dmypy inspect for namespace packages (#16357)
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