ENH: usecols takes input order for read_csv implementation review#61967

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eicchen wants to merge 7 commits intopandas-dev:mainfrom

eicchen:ENH-#61386-usecols

Commits on Jul 17, 2025

Initial testcase for read_csv
eicchen
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Commits on Jul 18, 2025

Added missing 0 in testcase
eicchen
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Commits on Jul 21, 2025

Added simple implementation of usecols order for read_csv
eicchen
committed

Commits on Jul 25, 2025

Added future flag for usecols_use_order
eicchen
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Added check for future flag, improved testcase to check flag and more complicated usecols order
eicchen
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Fixed issue with reading out of order lists, added exception for pyarrow.
eicchen
committed

Commits on Jul 26, 2025

fixed issues where usecols became a required input
eicchen
committed