IdeaSift

Python developers lack precise, checker-specific type-error suppressions

Python developers using mypy struggle to silence false positives or errors from untyped libraries without adding repeated workarounds or hiding unrelated issues. Standard line-level ignores can also affect other type checkers, while file-level ignores are too broad. One signal is about IDE support for type hints, an adjacent but less specific problem.

For python developers using mypy and multiple type checkers. Mentioned from Jun 2019 to Nov 2024 on GitHub and Stack Exchange.

3 different people described this problem in 3 separate discussions.

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What people said

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  1. Currently the only options are: Add # type: ignore` on each line causing errors by the external library * Disadvantage: Cumbersome (many type-comments needed) * Advantage: Only the problematic calls are silenced
    exhuma on GitHub (python/mypy)Jun 2019+45 upvotesAsked for a toolHas a workaround
  2. When a bug in mypy is causing it to flag a line that other type checkers are not flagging, the user can't add a type: ignore to that line without causing their other type checkers to complain about an unused ignore
    jab on GitHub (python/mypy)Mar 2022+53 upvotesAsked for a tool
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