python / python/mypy

Clean-up get_proper_type() calls in fine-grained code

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topic-developer topic-fine-grained-incremental topic-usability
Dominant language
Python
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Description

There are some excessive get_proper_type() calls in mypy/server/*.py, that result in verbose error messages for recursive types. We should clean those up.

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 searching the get_proper_type() calls under mypy/server/*.py and trace how they affect error formatting for recursive types. Compare the resulting diagnostics before and after cleanup; done means unnecessary calls are removed without changing intended type-checking behavior or producing verbose recursive-type messages.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
devtools
Issue type
Refactor
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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