python / python/mypy

Ignore-list for gradual typing

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#10,742 0 comments 1 reaction 0 assignees View on GitHub

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feature
Dominant language
Python
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Description

Feature

To enable strict checking in an existing codebase, one has to either:

  1. type-annotate all existing code, or
  2. add # type: ignore to most lines, or
  3. exempt existing files type strict checking

I'd like to propose an ignore list that "locks in place" the current symbols and their lack of signatures, on a symbol-by-symbol basis and not per-file basis.

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

No files, tests, or entry points are named. Start by locating mypy's strict-checking configuration and existing handling for # type: ignore, then determine how an ignore list could lock symbols rather than files. Done means the proposal has defined behavior and acceptance criteria for symbol-level exemptions.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
compilers, devtools
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
20/100

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