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Use mirrors-mypy for pre-commit #1291

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nathanjmcdougall
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@nathanjmcdougall nathanjmcdougall commented Aug 7, 2023

I was having issues with the local hook for mypy.

Specifically, was getting inconsistent results between running pre-commit run --all-files versus pre-commit install and then git commit etc.

I changed this configuration to use https://github.com/pre-commit/mirrors-mypy, and once ensuring compliance across the codebase, I could get consistent results. I'm not sure of the motivation for using a local hook - if we need to stick with it, then I think there might need to be some more configuration to get ensure consistency.

For calls to pd.DataFrame.drop, I've preferentially used the columns argument since in some cases this was causing mypy issues.

Some formatting changes via black.

I also had some trouble considering how to test mypy compliance against different versions of python without creating separate environments for each version and switching between them. I don't know if you have any advice about this for contributors?

prefer df.drop(columns=...) syntax
remove cautious 3.6 import for Literal

Signed-off-by: Nathan McDougall <[email protected]>
black via pre-commit

Signed-off-by: Nathan McDougall <[email protected]>
black formatting

Signed-off-by: Nathan McDougall <[email protected]>
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codecov bot commented Aug 7, 2023

Codecov Report

Patch coverage: 95.45% and project coverage change: +0.02% 🎉

Comparison is base (c1f9863) 93.82% compared to head (155fe49) 93.84%.
Report is 2 commits behind head on main.

Additional details and impacted files
@@            Coverage Diff             @@
##             main    #1291      +/-   ##
==========================================
+ Coverage   93.82%   93.84%   +0.02%     
==========================================
  Files          90       90              
  Lines        6704     6698       -6     
==========================================
- Hits         6290     6286       -4     
+ Misses        414      412       -2     
Files Changed Coverage Δ
pandera/engines/pandas_engine.py 95.42% <75.00%> (-0.02%) ⬇️
pandera/api/pandas/model.py 93.15% <100.00%> (+0.65%) ⬆️
pandera/api/pandas/types.py 96.00% <100.00%> (-0.16%) ⬇️
pandera/api/pyspark/types.py 100.00% <100.00%> (ø)
pandera/backends/pandas/checks.py 93.04% <100.00%> (ø)
pandera/backends/pyspark/container.py 67.47% <100.00%> (ø)
pandera/dtypes.py 95.49% <100.00%> (-0.04%) ⬇️
pandera/engines/numpy_engine.py 100.00% <100.00%> (ø)
pandera/strategies/pandas_strategies.py 97.82% <100.00%> (+<0.01%) ⬆️
pandera/typing/formats.py 100.00% <100.00%> (ø)

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@nathanjmcdougall nathanjmcdougall marked this pull request as ready for review August 7, 2023 15:37
@@ -357,7 +357,7 @@ def strict_filter_columns(
)

if schema.strict == "filter":
check_obj = check_obj.drop(*filter_out_columns)
check_obj = check_obj.drop(columns=filter_out_columns)
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Yeah, I should have been more careful regarding pyspark.

@cosmicBboy cosmicBboy merged commit 85cdcec into unionai-oss:main Aug 22, 2023
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@nathanjmcdougall it seems like merging this PR is breaking linters on main... does this mypy error look familiar? https://github.com/unionai-oss/pandera/actions/runs/5942557462/job/16115774607

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I can't say precisely why that happened - presumably this branch was a few commits behind main in a way that tripped up mypy. I've made a fix branch at #1321.

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Amazing, thanks!

@cosmicBboy cosmicBboy mentioned this pull request Jan 24, 2024
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