gh-155033: Support copy.replace() for csv dialects - #155035
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serhiy-storchaka merged 3 commits intoAug 13, 2026
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Add __replace__() to the _csv.Dialect type and to the csv.Dialect base class. Formatting parameters that are not replaced are inherited from the original dialect, and the result is validated like a newly created dialect. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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The change is too minor for What's New. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Aug 14, 2026
…5035) Add __replace__() to the _csv.Dialect type and to the csv.Dialect base class. Formatting parameters that are not replaced are inherited from the original dialect, and the result is validated like a newly created dialect. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Add
__replace__()to the_csv.Dialecttype and to thecsv.Dialectbase class, so that CSV dialects supportcopy.replace().Parameters that are not replaced are inherited from the original dialect, and the result is validated like a newly created dialect.