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TYP: RangeIndex._constructor #43387

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twoertwein opened this issue Sep 3, 2021 · 1 comment · Fixed by #43828
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TYP: RangeIndex._constructor #43387

twoertwein opened this issue Sep 3, 2021 · 1 comment · Fixed by #43828
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Typing type annotations, mypy/pyright type checking
Milestone
1.4

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@twoertwein
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RangeIndex._constructor returns Type[Int64Index] but it is supposed to return the current type of the class itself (Type[RangeIndex]) .

pandas/core/indexes/range.py:179: error: Return type "Type[Int64Index]" of "_constructor" incompatible with return type "Type[RangeIndex]" in supertype "Index" [override]

Found by declaring cache_readonly = property.
@twoertwein twoertwein added Bug Needs Triage Issue that has not been reviewed by a pandas team member labels Sep 3, 2021
@twoertwein
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Very similar issue here again:
pandas/core/indexes/multi.py:1098: error: Return type "Callable[..., MultiIndex]" of "_constructor" incompatible with return type "Type[MultiIndex]" in supertype "Index" [override]

Probably need to change Index._constructor or ignore these two cases.

@twoertwein twoertwein mentioned this issue Sep 3, 2021
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@simonjayhawkins simonjayhawkins added Typing type annotations, mypy/pyright type checking and removed Needs Triage Issue that has not been reviewed by a pandas team member labels Sep 4, 2021
@simonjayhawkins simonjayhawkins added this to the Contributions Welcome milestone Sep 4, 2021
@twoertwein twoertwein mentioned this issue Oct 1, 2021
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@simonjayhawkins simonjayhawkins modified the milestones: Contributions Welcome, 1.4 Oct 21, 2021
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TYP: enable disallow_untyped_decorators
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@twoertwein @simonjayhawkins