Fix set annotations in concurrent.futures._base #6034
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Diff from mypy_primer, showing the effect of this PR on open source code: optuna (https://github.com/optuna/optuna.git)
- optuna/study/_optimize.py:103: error: Incompatible types in assignment (expression has type "AbstractSet[Future[Any]]", variable has type "Set[Future[Any]]")
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Akuli
reviewed
Sep 14, 2021
| def __new__(_cls, done: Set[Future[_T]], not_done: Set[Future[_T]]) -> DoneAndNotDoneFutures[_T]: ... | ||
| done: set[Future[_T]] | ||
| not_done: set[Future[_T]] | ||
| def __new__(_cls, done: set[Future[_T]], not_done: set[Future[_T]]) -> DoneAndNotDoneFutures[_T]: ... |
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Should done and not_done be mutable, so that users can add or remove futures from them? collections.abc.Set is immutable and would prevent that.
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They are set in the implementation and mutable.
Akuli
approved these changes
Sep 14, 2021
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Fixes #6033