Issues

New issue

Announcement issue for plugin API changes
#6617 · msullivan opened on Apr 3, 2019
25
Using mypy via pre-commit
#13916 · hauntsaninja opened on Oct 17, 2022
14

Re-think our high level logic for type inference
python/mypy#22063 · opened on Sep 28, 2026
1
Option to report deprecated only for symbols defined in selected packages (inverse of deprecated_calls_exclude)
python/mypy#22026 · opened on Sep 23, 2026
1
sqlite3.OperationalError: disk I/O error
python/mypy#22010 · opened on Sep 20, 2026
2
mypy rejects subclassing Any typed *args entries within a function
python/mypy#21998 · opened on Sep 16, 2026
4
Checking a match on an enum becomes quadratically slow after the variable was narrowed by an == check
python/mypy#21997 · opened on Sep 16, 2026
Concurrent parallel invocations can lose worker-options files
python/mypy#21974 · opened on Sep 13, 2026
6
Exhaustiveness of type tuple[bool, bool]
python/mypy#21968 · opened on Sep 11, 2026
1
Type expression arguments aren't recognized as TypeForm when the parameter type is a union containing a TypeForm
python/mypy#21964 · opened on Sep 10, 2026
2
Self is not rejected when used as a PEP 695 type parameter bound
python/mypy#21960 · opened on Sep 8, 2026
2
New parser deviates from old parser in edge cases with function type comments
python/mypy#21948 · opened on Sep 6, 2026
2
Errors from new parser can be worse (compared to old parser)
python/mypy#21947 · opened on Sep 6, 2026
typing.Protocol is explicitly treated as not a type
python/mypy#21940 · opened on Sep 4, 2026
7
mypyc silently drops class keyword arguments
python/mypy#21938 · opened on Sep 4, 2026
Incorrect narrowing of Enum.Flag
python/mypy#21937 · opened on Sep 4, 2026
2
2.4 Release Planning
python/mypy#21935 · opened on Sep 3, 2026
13
Crash on unpacked tuple in tuple type definition
python/mypy#21933 · opened on Sep 3, 2026
1
Irrefutable pattern before the last case in a match statement passes type checking but is a SyntaxError at runtime
python/mypy#21925 · opened on Sep 1, 2026
[mypyc] Design discussion: build-system-neutral C generation CLI (mypyc cgen) for projects not using setuptools
python/mypy#21923 · opened on Sep 1, 2026
1
Internal error on mypy of dataclass with TypedDict as ClassVar
python/mypy#21915 · opened on Aug 31, 2026
1
Union(Type) and TypeForm
python/mypy#21910 · opened on Aug 29, 2026
"INTERNAL_ERROR": generic fun w/ Callable param w/ constrained return type followed by *args typed as *Tuple[int, float] crashes mypy
python/mypy#21907 · opened on Aug 28, 2026
3
Mypy treating type of final class variable in dataclass as Any
python/mypy#21906 · opened on Aug 28, 2026
6
tests testoutput.py::OutputJSONsuite can be flaky on high-core-count systems
python/mypy#21905 · opened on Aug 28, 2026
get_function_signature_hook is not invoked on function decorators
python/mypy#21904 · opened on Aug 28, 2026
mypy widens multiple type parameters even when only the first one is relevant
python/mypy#21903 · opened on Aug 28, 2026

Navigation Menu

Issues

Issues

Re-think our high level logic for type inference

Option to report `deprecated` only for symbols defined in selected packages (inverse of `deprecated_calls_exclude`)

sqlite3.OperationalError: disk I/O error

mypy rejects subclassing `Any` typed `*args` entries within a function

Checking a match on an enum becomes quadratically slow after the variable was narrowed by an == check

Concurrent parallel invocations can lose worker-options files

Exhaustiveness of type tuple[bool, bool]

Type expression arguments aren't recognized as `TypeForm` when the parameter type is a union containing a `TypeForm`

Self is not rejected when used as a PEP 695 type parameter bound

New parser deviates from old parser in edge cases with function type comments

Errors from new parser can be worse (compared to old parser)

`typing.Protocol` is explicitly treated as not a `type`

mypyc silently drops class keyword arguments

Incorrect narrowing of Enum.Flag

2.4 Release Planning

Crash on unpacked tuple in tuple type definition

Irrefutable pattern before the last case in a match statement passes type checking but is a SyntaxError at runtime

[mypyc] Design discussion: build-system-neutral C generation CLI (mypyc cgen) for projects not using setuptools

Internal error on mypy of `dataclass` with `TypedDict` as `ClassVar`

Union(Type) and TypeForm

"INTERNAL_ERROR": generic fun w/ Callable param w/ constrained return type followed by `args` typed as `Tuple[int, float]` crashes mypy

Mypy treating type of final class variable in dataclass as Any

tests testoutput.py::OutputJSONsuite can be flaky on high-core-count systems

`get_function_signature_hook` is not invoked on function decorators

`mypy` widens multiple type parameters even when only the first one is relevant