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gh-101640: Make argparse _print_message catch any write error (#101802)

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* In particular, don't exit when trying to print to stderr = None.
* Add tests

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
This commit is contained in:
Oleg Iarygin 2023-05-07 02:53:48 +04:00 • committed by GitHub
parent 92d8bfffbf
commit 42f54d1f92
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3 changed files with 37 additions and 3 deletions
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8
Lib/argparse.py
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@ -2605,9 +2605,11 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
def _print_message(self, message, file=None):
if message:
if file is None:
file = _sys.stderr
file.write(message)
file = file or _sys.stderr
try:
file.write(message)
except (AttributeError, OSError):
pass
# ===============
# Exiting methods