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TYP: Narrow down type of method keyword in Index #52723

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Merged
merged 5 commits into from
May 7, 2023
Merged

TYP: Narrow down type of method keyword in Index #52723

merged 5 commits into from
May 7, 2023

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@kklein
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@kklein kklein commented Apr 18, 2023 •
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This PR narrows down the type of the method keyword, used in two methods of the class Index to exactly the permitted values via the use of Literal.

  • closes #xxxx (Replace xxxx with the GitHub issue number)
  • Tests added and passed if fixing a bug or adding a new feature
  • All code checks passed.
  • Added type annotations to new arguments/methods/functions.
  • Added an entry in the latest doc/source/whatsnew/vX.X.X.rst file if fixing a bug or adding a new feature.
@kklein kklein changed the title Narrow down types of method in Index TYP: Narrow down types of method in Index Apr 18, 2023
@kklein kklein changed the title TYP: Narrow down types of method in Index TYP: Narrow down type of method keyword in Index Apr 18, 2023
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kklein commented Apr 18, 2023

@phofl @noatamir @jorisvandenbossche @MarcoGorelli PyData workshop
@noatamir noatamir added the Sprints Sprint Pull Requests label Apr 18, 2023
twoertwein
twoertwein reviewed Apr 18, 2023
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@kklein
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kklein commented Apr 18, 2023

Any suggestions on how to proceed with clean_reindex_fill_method and clean_fill_method?
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twoertwein commented Apr 19, 2023

Didn't see that mypy failed:

pandas/core/indexes/base.py:3749: error: Incompatible types in assignment (expression has type "Optional[str]", variable has type "Optional[Literal['pad', 'ffill', 'backfill', 'bfill', 'nearest']]") [assignment]

You might be able to change the signature of clean_reindex_fill_method or add an ignore comment.
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phofl commented Apr 21, 2023

Yep you can change the signature as well
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kklein commented May 6, 2023 •
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@phofl @twoertwein
Sorry about the delay!

The mypy/typing problem seems to be resolved, yet one unit tests is failing. Could it be that it's flaky? I haven't been able to deduce much from the error message.
@twoertwein twoertwein merged commit 8ef94a0 into pandas-dev:main May 7, 2023
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twoertwein commented May 7, 2023

Thank you @kklein !
Rylie-W pushed a commit to Rylie-W/pandas that referenced this pull request May 19, 2023
@kklein
TYP: Narrow down type of method keyword in Index (pandas-dev#52723)
842b57d 
* Add literal type hint. * Move type variable to _typing.py. * Use existing type alias. * EOF
Daquisu pushed a commit to Daquisu/pandas that referenced this pull request Jul 8, 2023
@kklein
TYP: Narrow down type of method keyword in Index (pandas-dev#52723)
563cf3f 
* Add literal type hint. * Move type variable to _typing.py. * Use existing type alias. * EOF
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@kklein @twoertwein @phofl @noatamir