python / python/cpython

`functools.partialmethod` simplification

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extension-modules stdlib type-feature
Dominant language
Python
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Description

Feature or enhancement

Proposal:

Now, as partial has __get__ and Placeholder it is probably a good idea to simplify partialmethod.

So the mental model of partialmethod can simply be:

partial, which always has the first argument set to Placeholder.

So partialmethod could maybe be a subclass partial, which would potentially simplify things.

Also, maybe there is a way so that partialmethod can be made obsolete altogether.

Will see where I can get to with this.
Any ideas welcome.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

https://github.com/python/cpython/issues/121027
https://github.com/python/cpython/pull/119827#issuecomment-2190108757

Linked PRs
  • gh-124788

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 reading the functools.partialmethod and functools.partial entry points, including the Placeholder behavior described in the proposal. Review issue 121027 and PR 119827's discussion, then inspect linked PR 124788. Done would require resolving whether the simplification or obsolescence proposal is viable and defining the resulting implementation and compatibility changes.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
backend
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
15/100

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