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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

Cannot access custom property of union type bug mypy got something wrong false-positive mypy gave an error on correct code priority-1-normal topic-descriptors Properties, class vs. instance attributes topic-runtime-semantics mypy doesn't model runtime semantics correctly topic-union-types
#9053 opened Jun 26, 2020 by nielsbuwen
😕 2
Bad circular imports are not rejected feature priority-2-low topic-runtime-semantics mypy doesn't model runtime semantics correctly
#61 opened Jan 27, 2013 by ashleyh
12
x = x or y with x undeclared gives no error bug mypy got something wrong priority-1-normal topic-runtime-semantics mypy doesn't model runtime semantics correctly topic-variable-scope
#937 opened Oct 15, 2015 by jhance
2
mypy infers the wrong type for classmethods bug mypy got something wrong topic-descriptors Properties, class vs. instance attributes topic-runtime-semantics mypy doesn't model runtime semantics correctly
#3482 opened Jun 1, 2017 by carljm
3
isinstance(x, Type) not accepted bug mypy got something wrong false-positive mypy gave an error on correct code priority-1-normal topic-runtime-semantics mypy doesn't model runtime semantics correctly topic-type-narrowing Conditional type narrowing / binder topic-usability
#3060 opened Mar 27, 2017 by JukkaL
6
Unions with invalid arguments are still allowed bug mypy got something wrong topic-runtime-semantics mypy doesn't model runtime semantics correctly
#3258 opened Apr 26, 2017 by refi64
1
defining self.__call__ makes the class callable when it isn't bug mypy got something wrong priority-1-normal topic-runtime-semantics mypy doesn't model runtime semantics correctly
#2113 opened Sep 8, 2016 by euresti
5
Return inside class inside function should be an error bug mypy got something wrong priority-2-low topic-runtime-semantics mypy doesn't model runtime semantics correctly
#1683 opened Jun 9, 2016 by gvanrossum
Inconsistency with NewType topic-newtype NewType topic-runtime-semantics mypy doesn't model runtime semantics correctly
#4990 opened May 2, 2018 by gvanrossum
Disallow locally-generated types from escaping their function topic-runtime-semantics mypy doesn't model runtime semantics correctly topic-variable-scope
#4690 opened Mar 7, 2018 by msullivan
1
Using not yet defined variables is allowed bug mypy got something wrong priority-2-low topic-runtime-semantics mypy doesn't model runtime semantics correctly topic-variable-scope
#2788 opened Feb 1, 2017 by afrieder
2
Check keyword arguments in class definitions feature priority-2-low topic-metaclasses topic-runtime-semantics mypy doesn't model runtime semantics correctly
#2653 opened Jan 7, 2017 by JelleZijlstra
1
Using annotated global/nonlocal variables is allowed bug mypy got something wrong priority-1-normal topic-runtime-semantics mypy doesn't model runtime semantics correctly
#2789 opened Feb 1, 2017 by afrieder
2
Wrong warning when assigning __str__ bug mypy got something wrong topic-descriptors Properties, class vs. instance attributes topic-runtime-semantics mypy doesn't model runtime semantics correctly
#3951 opened Sep 13, 2017 by nicoulaj
1
Mypy doesn't recognize __loader__ global in Python 3.6 bug mypy got something wrong false-positive mypy gave an error on correct code priority-1-normal size-small topic-runtime-semantics mypy doesn't model runtime semantics correctly
#4182 opened Oct 31, 2017 by rowillia
3
Class variable gets the type of instance variable topic-runtime-semantics mypy doesn't model runtime semantics correctly topic-variable-scope
#4886 opened Apr 11, 2018 by roganov
4
Should we always prohibit "abstract" attributes? needs discussion topic-protocols topic-runtime-semantics mypy doesn't model runtime semantics correctly
#4426 opened Jan 3, 2018 by ilevkivskyi
1
14
False negative involving null checks on optional types bug mypy got something wrong priority-0-high topic-reachability Detecting unreachable code topic-runtime-semantics mypy doesn't model runtime semantics correctly
#5423 opened Aug 6, 2018 by person594
6
No error when attempting to use property object as that property's type priority-2-low topic-descriptors Properties, class vs. instance attributes topic-named-tuple topic-runtime-semantics mypy doesn't model runtime semantics correctly
#6192 opened Jan 15, 2019 by andy-hanson
isinstance(x, Tuple) fails when equivalent expressions don't bug mypy got something wrong false-positive mypy gave an error on correct code priority-2-low topic-runtime-semantics mypy doesn't model runtime semantics correctly
#6680 opened Apr 16, 2019 by lbenezriravin
11
Exception variable can leak to other scopes causing strange error messages priority-2-low topic-runtime-semantics mypy doesn't model runtime semantics correctly topic-usability topic-variable-scope
#6647 opened Apr 8, 2019 by ilevkivskyi
4
mypy fails to recognize functions as generators when sys.platform is used in conditions bug mypy got something wrong priority-1-normal topic-runtime-semantics mypy doesn't model runtime semantics correctly
#5678 opened Sep 26, 2018 by marcinsulikowski
2
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
Allow method assignment in body of type extending typing.NamedTuple bug mypy got something wrong priority-2-low topic-named-tuple topic-runtime-semantics mypy doesn't model runtime semantics correctly
#8543 opened Mar 15, 2020 by asottile
8
Mypy issue with python scoping rule bug mypy got something wrong priority-1-normal topic-runtime-semantics mypy doesn't model runtime semantics correctly topic-variable-scope
#8746 opened Apr 29, 2020 by h8hawk
2
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