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argparse indentation overshoots due to colors #139736
Description
Bug report
Bug description:
As of 3.14, argparse --help accidentally includes the ansi-escapes when calculating the length of the invocations, resulting in excessive margins between options and their helptext. Effectively, the indentation will always be 24 (max_help_position).
import argparse
argparse.ArgumentParser().print_help()in 3.14, this produces:
options:
-h, --help show this help message and exit
in previous versions, it produces:
options:
-h, --help show this help message and exit
CPython versions tested on:
CPython main branch
Operating systems tested on:
Linux
Activity
pythongh-139736: Fix argparse indentation overshoot
pythongh-139736: Fix argparse indentation overshoot
gh-139736: Fix argparse indentation overshoot (#139738)
pythongh-139736: Fix argparse indentation overshoot (pythonGH-139738)
[3.14] gh-139736: Fix argparse indentation overshoot (GH-139738) (#13…
hugovk commentedon Oct 8, 2025
Thanks for the report and fix!