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bpo-26952: [argparse] clearer error when formatting an empty mutually… (GH-30099)

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Irit Katriel 2021-12-15 10:08:26 +00:00 • committed by GitHub
parent f54fee7f37
commit 86de99588d
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Lib/argparse.py
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@ -392,6 +392,9 @@ class HelpFormatter(object):
group_actions = set()
inserts = {}
for group in groups:
if not group._group_actions:
raise ValueError(f'empty group {group}')
try:
start = actions.index(group._group_actions[0])
except ValueError: