Add --disallow-str-iteration flag #20577
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mypy/typeshed/stdlib/builtins.pyi
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| def __getitem__(self, i: int, /) -> _T_co: ... | ||
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| @overload | ||
| def iter(object: str, /) -> Iterable[str]: ... |
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This needs to be in a patch file, or it will be overwritten next time we sync typeshed. Look for similar patch files in the repo (there are a few related to LiteralString).
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Diff from mypy_primer, showing the effect of this PR on open source code: altair (https://github.com/vega/altair)
+ tools/vega_expr.py:822: error: "str" has no attribute "get" [attr-defined]
ibis (https://github.com/ibis-project/ibis)
+ ibis/expr/types/generic.py:1785: error: "str" has no attribute "to_expr" [attr-defined]
apprise (https://github.com/caronc/apprise)
+ apprise/config/base.py:1509: note: def iter(str, /) -> Iterator[str]
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Fixes #11001
Related to typing python/typing#256