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Announcement issue for plugin API changes
#6617 · msullivan opened on Apr 3, 2019
23

Labels Milestones New issue

<code>contains</code> must accept <code>object</code> even when container is annotated as <code>Container[str]</code>

#20740

· samueljsb opened

on Feb 4, 2026

Type of instance variable narrowed incorrectly after <code>is not</code> expression

topic-type-narrowing

#20736

· p-sawicki opened

on Feb 4, 2026

Type of literal narrowed when asserting equality to a NewType

topic-type-narrowing

#20733

· p-sawicki opened

on Feb 3, 2026

1.20 and 2.0 Release Planning

#20726

· ilevkivskyi opened

on Feb 2, 2026

Relax default overload subtyping checks

topic-overloads

#20720

· randolf-scholz opened

on Feb 2, 2026

mypy doesn't get error with <code>dict(**{10: 20})</code> while PVM gets error

topic-runtime-semantics

topic-type-context

#20706

· hyperkai opened

on Jan 31, 2026

The different type (<code>str</code>) of unpacked inner dictionary items from the type (<code>int</code>) of outer dictionary items gets error

topic-type-context

#20705

· hyperkai opened

on Jan 31, 2026

mypy doesn't get error with typed <code>dict(*{'A': 10})</code> while PVM gets error

topic-type-context

#20702

· hyperkai opened

on Jan 30, 2026

Cyclic definition error when defaulting <code>TypeVar</code> on base class to subclass

#20698

· randolf-scholz opened

on Jan 30, 2026

Type narrowing of <code>target: type[T]</code> using insinstance seems to fool mypy

topic-type-narrowing

#20690

· juliancoffee opened

on Jan 29, 2026

Unreachability should detect redundant <code>isinstance</code>s even for <code>object</code> arguments

topic-reachability

#20668

· A5rocks opened

on Jan 28, 2026

Incorrect type inference with PEP 646 Unpack and self-type annotations

topic-type-variables

#20651

· zzzeek opened

on Jan 26, 2026