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Issues: python/mypy

Announcement issue for plugin API changes
#6617 opened Apr 3, 2019 by msullivan
Open 15
Python 3.13 tracking issue
#17264 opened May 18, 2024 by hauntsaninja
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Issues list

when descendents of a common base implement a shared protocol, a ternary returning either cannot be assigned to the protocol bug mypy got something wrong topic-join-v-union Using join vs. using unions
#16281 by glyph was closed Oct 17, 2023
2
mypy thinks that instance variables that implement the descriptor protocol are invoked when accessing them bug mypy got something wrong topic-descriptors Properties, class vs. instance attributes
#15822 opened Aug 5, 2023 by glyph
3
TypeVar declared at class scope with generic bound specialized on an in-scope generic parameter TypeVar doesn't give an error bug mypy got something wrong
#15758 opened Jul 24, 2023 by glyph
4
properties appear to lose their specialness inside context managers at class scope bug mypy got something wrong topic-descriptors Properties, class vs. instance attributes
#15507 opened Jun 23, 2023 by glyph
callables are inferred to be descriptors when they shouldn't always be, protocols are inferred to not be descriptors when maybe they should, and mypy converts between them with no error bug mypy got something wrong
#15189 opened May 5, 2023 by glyph
13
callable protocols cannot infer the type of their own self bug mypy got something wrong
#15188 by glyph was closed Sep 14, 2023
1
at runtime dataclass special-cases FunctionType, but at type-time mypy special-cases Callable, leading to mismatches bug mypy got something wrong
#14869 opened Mar 10, 2023 by glyph
2
callable protocols can be satisfied by any type object, even ones with nothing to do with their return type or arguments bug mypy got something wrong
#14544 by glyph was closed Feb 27, 2023
4
adding __name__ attribute to a callable Protocol doesn't work with function objects and breaks inference with Protocol objects bug mypy got something wrong topic-calls Function calls, *args, **kwargs, defaults topic-protocols
#12976 by glyph was closed Nov 16, 2022
1
__instancecheck__ on an instance works at runtime, but mypy thinks it's invalid feature priority-2-low topic-runtime-semantics mypy doesn't model runtime semantics correctly
#12974 by glyph was closed Jun 14, 2022
4
class decorator syntax seems to ignore dataclasses' constructor signatures bug mypy got something wrong topic-dataclasses
#12971 opened Jun 11, 2022 by glyph
2
Protocol can't constrain __init__ bug mypy got something wrong topic-protocols
#12970 by glyph was closed Nov 16, 2022
3
it's not possible to define an 'add' that works with more than one kind of number when using number types directly bug mypy got something wrong
#12899 opened May 28, 2022 by glyph
4
every-attribute-optional derived type, like TypeScript's Partial feature
#10889 by glyph was closed Apr 4, 2022
1
I want to be able to declare "naive datetime" or "aware datetime" as types feature
#10067 opened Feb 11, 2021 by glyph
8
deleting a class-scoped variable that shadows a global variable causes mypy to think it's undefined bug mypy got something wrong topic-runtime-semantics mypy doesn't model runtime semantics correctly topic-variable-scope
#9600 opened Oct 15, 2020 by glyph
generic parameter with None default populates its TypeVar as Optional when it should just be None sometimes bug mypy got something wrong
#9468 by glyph was closed Sep 22, 2020
2
a decorator that modifies another decorator gives an incorrect type error bug mypy got something wrong topic-calls Function calls, *args, **kwargs, defaults
#9265 opened Aug 4, 2020 by glyph
2
properties can't narrow the type of their setter
#9180 by glyph was closed Jul 22, 2020
2
datetimes and dates are not substitutable but mypy thinks they are needs discussion
#9015 opened Jun 17, 2020 by glyph
3
self-referential type can't be represented by a Protocol
#8486 by glyph was closed Mar 6, 2020
3
attrs plugin error: "The erased type of self '...*' is not a supertype of its class" on class definition with a generic using a constrained type variable, but then seems to work fine after definition bug mypy got something wrong priority-1-normal topic-attrs topic-type-variables
#5542 by glyph was closed Sep 3, 2018
7
type alias to union is invalid in runtime context bug mypy got something wrong false-positive mypy gave an error on correct code priority-1-normal
#5354 by glyph was closed May 5, 2020
1
26
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