python / python/mypy

no error when calling abstract `staticmethod`/`classmethod`

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#14,939 7 comments 2 reactions 0 assignees View on GitHub

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bug good-second-issue
Dominant language
Python
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Description

from abc import ABC, abstractmethod

class Foo(ABC):
    @staticmethod
    @abstractmethod
    def foo() -> Foo:
        ...


Foo.foo() # no error

playground

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by running the provided Python example in the linked mypy playground and tracing how abstractmethod is handled when combined with staticmethod or classmethod. Done means calls to abstract static or class methods produce the expected type-checking error, with regression coverage for the reported case.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
devtools
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

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