https://github.com/python/cpython/commit/dc9f2385ed528caf4ab02965b6d3e16b8a72db25
commit: dc9f2385ed528caf4ab02965b6d3e16b8a72db25
branch: main
author: Savannah Ostrowski <[email protected]>
committer: savannahostrowski <[email protected]>
date: 2025-12-07T21:02:12Z
summary:
GH-139862: Fix direct instantiation of `HelpFormatter` (#142384)
files:
M Lib/argparse.py
M Lib/test/test_argparse.py
diff --git a/Lib/argparse.py b/Lib/argparse.py
index 6ed7386d0dd407..398825508f5917 100644
--- a/Lib/argparse.py
+++ b/Lib/argparse.py
@@ -189,6 +189,8 @@ def __init__(
self._whitespace_matcher = _re.compile(r'\s+', _re.ASCII)
self._long_break_matcher = _re.compile(r'\n\n\n+')
+ self._set_color(False)
+
def _set_color(self, color):
from _colorize import can_colorize, decolor, get_theme
diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py
index fe5232e9f3b591..7c5eed21219de0 100644
--- a/Lib/test/test_argparse.py
+++ b/Lib/test/test_argparse.py
@@ -5694,6 +5694,11 @@ def custom_formatter(prog):
a-very-long-command command that does something
'''))
+ def test_direct_formatter_instantiation(self):
+ formatter = argparse.HelpFormatter(prog="program")
+ formatter.add_usage(usage=None, actions=[], groups=[])
+ help_text = formatter.format_help()
+ self.assertEqual(help_text, "usage: program\n")
# =====================================
# Optional/Positional constructor tests
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