New submission from Robert Leenders: There is a value for nargs: PARSER="A..." which is not documented at http://docs.python.org/3.4/library/argparse.html#nargs. The docstring for the action class in argparse.py also does not list PARSER as a valid value for nargs. In argparse.py on line 2199-2201 it says: # Allow one argument followed by any number of options or arguments elif nargs == PARSER: nargs_pattern = '(-*A[-AO]*)' This is the only hint that I could find on what it is about. ---------- assignee: docs@python components: Documentation messages: 180155 nosy: ReDAeR, bethard, docs@python priority: normal severity: normal status: open title: argparse: PARSER option for nargs not documented type: enhancement versions: Python 3.4 _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue16988> _______________________________________