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[3.14] GH-139946: Document argparse includes color codes when redirecting to stderr to file #142398

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savannahostrowski merged 3 commits into from
Dec 9, 2025
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[3.14] GH-139946: Document argparse includes color codes when redirecting to stderr to file #142398

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c4fb950
Document workaround for argparse stderr to file
savannahostrowski Dec 8, 2025
7e0a7ad
Fix NO_COLOR
savannahostrowski Dec 8, 2025
d195816
Update Doc/library/argparse.rst
savannahostrowski Dec 9, 2025
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6 changes: 6 additions & 0 deletions Doc/library/argparse.rst
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Expand Up @@ -644,6 +644,12 @@ variables and terminal capabilities. However, if ``color=False``, colored
output is always disabled, even if environment variables like ``FORCE_COLOR``
are set.

.. note::

Error messages will include color codes when redirecting stderr to a
file. To avoid this, set the |NO_COLOR|_ or :envvar:`PYTHON_COLORS`
environment variable (e.g., ``NO_COLOR=1 python script.py 2> errors.txt``).

.. versionadded:: 3.14


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