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Create tool to help migration to --local-partial-types

feature

priority-0-high

Status: Open.

#20579 In python/mypy;

· JukkaL opened on Jan 13, 2026

Misleading error message with <code>dict.get</code> like method. (polymorphic function with conflicting context)

bugmypy got something wrong mypy got something wrong

Status: Open.

#20576 In python/mypy;

· randolf-scholz opened on Jan 13, 2026

Treat Assigning Coroutine to <code>_</code> the Same as Unused Coroutine

feature

Status: Open.

#20570 In python/mypy;

· michaeligreenberg opened on Jan 12, 2026

mypyc-compiled extensions missing math library linking causing undefined symbol errors

bugmypy got something wrong mypy got something wrong

Status: Open.

#20567 In python/mypy;

· BwL1289 opened on Jan 12, 2026

false positive no-any-return from a typed function nested in an untyped function

bugmypy got something wrong mypy got something wrong

Status: Open.

#20566 In python/mypy;

· tsteven4 opened on Jan 11, 2026

Better narrowing

feature

metaIssues tracking a broad area of work Issues tracking a broad area of work

Status: Open.

#20564 In python/mypy;

· hauntsaninja opened on Jan 11, 2026

False positive on manual overloaded <code>Foo[T].__init__(self, arg)</code> call

bugmypy got something wrong mypy got something wrong

topic-overloads

Status: Open.

#20557 In python/mypy;

· randolf-scholz opened on Jan 10, 2026

Setting an unpacked list to the generic type alias gets the error message 'Please report a bug at ...'

crash

Status: Open.

#20549 In python/mypy;

· hyperkai opened on Jan 8, 2026

mypy should give error at the timing when the type alias set multiple <code>TypeVarTuple</code>-based type parameters is defined but not used

bugmypy got something wrong mypy got something wrong

topic-pep-646PEP 646 (TypeVarTuple, Unpack) PEP 646 (TypeVarTuple, Unpack)

Status: Open.

#20544 In python/mypy;

· hyperkai opened on Jan 7, 2026

False positive with warn unreachable, Any, and None

bugmypy got something wrong mypy got something wrong

topic-reachabilityDetecting unreachable code Detecting unreachable code

Status: Open.

#20532 In python/mypy;

· hauntsaninja opened on Jan 6, 2026

Nondeterministic type-var error with LiteralString-bounded TypeVars

bugmypy got something wrong mypy got something wrong

Status: Open.

#20528 In python/mypy;

· ericbuehl opened on Jan 5, 2026

Assertion failure crash: assert not self.has_type_var_tuple_type

crash

topic-pep-646PEP 646 (TypeVarTuple, Unpack) PEP 646 (TypeVarTuple, Unpack)

topic-pep-695Issues related to PEP 695 syntax Issues related to PEP 695 syntax

Status: Open.

#20527 In python/mypy;

· correctmost opened on Jan 5, 2026