ENH: usecols takes input order for read_csv implementation review #61967
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… complicated usecols order
eicchen
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arthurlw
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Aug 5, 2025
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This pull request is stale because it has been open for thirty days with no activity. Please update and respond to this comment if you're still interested in working on this. |
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@eicchen can you merge main and address comments |
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Will do, have been buried in classwork but I'll have time TMR |
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Co-authored-by: Arthur Wigo <arthur.l.wigo@gmail.com>
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Closing PR down while I implement the function for applicable reads |
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doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.This is just the implementation for using usecols order for read_csv that I wanted to have people look at before moving to apply it to other places like read_excel and read_clipboard. If it all looks good, I'll go back and add all necessary documentation about future deprecation along with a popup when using usecols. This is mainly just for checking that the implementation doesn't have any glaring issues.
I ran the entire test suite just to be safe and it all looks good. The only thing the errored were some datetime tests that had nothing to do with the changes that I could find.
Oh it is also worth noting that pyarrow already uses the usecols order by default so that's probably worth adding to the documentation regardless