gh-155097: Add converter and formatter parameters in csv.reader and csv.writer - #155099
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gh-155097: Add converter and formatter parameters in csv.reader and csv.writer#155099serhiy-storchaka wants to merge 1 commit into
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… and csv.writer They are used instead of float() and str() for converting between fields and values. Both take the 0-based position of the field in the row as the first argument, so the conversion can depend on the column. Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
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This was referenced Aug 3, 2026
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The converter parameter of
csv.readeris used instead offloat()for converting unquoted fields, and the formatter parameter ofcsv.writeris used instead ofstr()for converting values to strings. Both are called with the 0-based position of the field in the row as the first argument, so the conversion can depend on the column.