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| author | Irit Katriel <1055913+iritkatriel@users.noreply.github.com> | 2021-12-15 10:08:26 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-12-15 10:08:26 (GMT) |
| commit | 86de99588db3beff964137f4fe27dd1077a09b35 (patch) | |
| tree | 08f7eb50ed9a1d7bdc23d0be4795632716548ae4 /Lib/argparse.py | |
| parent | f54fee7f37563fbd569596cf94aad023ac6c3179 (diff) | |
| download | cpython-86de99588db3beff964137f4fe27dd1077a09b35.zip cpython-86de99588db3beff964137f4fe27dd1077a09b35.tar.gz cpython-86de99588db3beff964137f4fe27dd1077a09b35.tar.bz2 | |
bpo-26952: [argparse] clearer error when formatting an empty mutually… (GH-30099)
Diffstat (limited to 'Lib/argparse.py')
| -rw-r--r-- | Lib/argparse.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Lib/argparse.py b/Lib/argparse.py index b44fa4f..8a81801 100644 --- a/Lib/argparse.py +++ b/Lib/argparse.py @@ -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: |