From aaf6fc0982c916cb71d9e0afcd7dda4ba495793b Mon Sep 17 00:00:00 2001 From: Anthony Sottile Date: Wed, 20 Sep 2017 14:35:27 -0700 Subject: bpo-26510: make argparse subparsers required by default (#3027) This fixes a regression from Python 2. To get optional subparsers, use the new parameter ``add_subparsers(required=False)``. Patch by Anthony Sottile. --- Lib/argparse.py | 2 ++ 1 file changed, 2 insertions(+) (limited to 'Lib/argparse.py') diff --git a/Lib/argparse.py b/Lib/argparse.py index d59e645203..98bbed0e50 100644 --- a/Lib/argparse.py +++ b/Lib/argparse.py @@ -1066,6 +1066,7 @@ class _SubParsersAction(Action): prog, parser_class, dest=SUPPRESS, + required=True, help=None, metavar=None): @@ -1079,6 +1080,7 @@ class _SubParsersAction(Action): dest=dest, nargs=PARSER, choices=self._name_parser_map, + required=required, help=help, metavar=metavar) -- cgit v1.2.1