Jake Hunsaker <jhuns...@redhat.com> added the comment:
Ah, ok - so I neglected to mention we're using subparsers which appears to be
relevant here. My apologies.
Here's a minimal reproducer that shows the behavior when using './arg_test.py
foo --bar=on'
```
#! /bin/python3
import argparse
usage_string = 'test usage string ending in newlines\n\n'
sub_cmd_usage = ''
for i in range(0, 3):
sub_cmd_usage += '\tfoo --bar\n'
usage_string += sub_cmd_usage
parser = argparse.ArgumentParser(usage=usage_string)
subparser = parser.add_subparsers(dest='subcmd', metavar='subcmd')
subcmd_parser = subparser.add_parser('foo')
subcmd_parser.add_argument('--bar', action="store_true", default=False)
if __name__ == '__main__':
args = parser.parse_args()
```
----------
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue42297>
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