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bpo-29298: Fix crash with required subparsers without dest (GH-3680) (GH-27304)

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(cherry picked from commit 17575f73ce)

Co-authored-by: Anthony Sottile <asottile@umich.edu>
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Miss Islington (bot) 2021-07-23 06:27:17 -07:00 • committed by GitHub
parent 0f55d21212
commit 097801844c
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3 changed files with 28 additions and 0 deletions
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2
Lib/argparse.py
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@ -727,6 +727,8 @@ def _get_action_name(argument):
return argument.metavar
elif argument.dest not in (None, SUPPRESS):
return argument.dest
elif argument.choices:
return '{' + ','.join(argument.choices) + '}'
else:
return None