Mypy Release Notes

Next release

Change to enum membership semantics

As per the updated typing specification for enums, enum members must be left unannotated.

class Pet(Enum):
    CAT = 1  # Member attribute
    DOG = 2  # Member attribute
    WOLF: int = 3  # New error: Enum members must be left unannotated
species: str  # Considered a non-member attribute

In particular, the specification change can result in issues in type stubs (.pyi files), since historically it was common to leave the value absent:

# In a type stub (.pyi file)
class Pet(Enum):

# Change in semantics: previously considered members, now non-member attributes

CAT: int

DOG: int
# Mypy will now issue a warning if it detects this situation in type stubs:
# &gt; Detected enum &quot;Pet&quot; in a type stub with zero members.
# &gt; There is a chance this is due to a recent change in the semantics of enum membership.
# &gt; If so, use `member = value` to mark an enum member, instead of `member: type`

class Pet(Enum):

# As per the specification, you should now do one of the following:

DOG = 1  # Member attribute with value 1 and known type

WOLF = cast(int, ...)  # Member attribute with unknown value but known type

LION = ...  # Member attribute with unknown value and unknown type

Contributed by Terence Honles in PR 17207 and Shantanu Jain in PR 18068.

Mypy 1.13

We’ve just uploaded mypy 1.13 to the Python Package Index (PyPI). Mypy is a static type checker for Python. You can install it as follows:

python3 -m pip install -U mypy

... (truncated)

Commits

eb31034 Bump version to 1.13.0
2eeb588 Update changelog for 1.12.1 (#17999)
bc0386b Changelog for 1.13 (#18000)
5c4d2db Add faster-cache extra, test in CI (#17978)
854ad18 Make is_sub_path faster (#17962)
50aa4ca Speed up stubs suggestions (#17965)
7c27808 Use orjson instead of json, when available (#17955)
2cd2406 Use fast path in modulefinder more often (#17950)
e20aaee Let mypyc optimise os.path.join (#17949)
159974c Use sha1 for hashing (#17953)
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sanders41 commented 3 weeks ago

@dependabot rebase

meili-bors[bot] commented 3 weeks ago

Build succeeded:

meilisearch / meilisearch-python

Bump mypy from 1.11.2 to 1.13.0 #1036

Mypy Release Notes

Next release

Change to enum membership semantics

Mypy 1.13