[issue26235] argparse docs: Positional * argument in mutually exclusive group requires a default parameter

Changes by Terry J. Reedy : -- nosy: +bethard ___ Python tracker ___ ___ Python-bugs-list

[issue26235] argparse docs: Positional * argument in mutually exclusive group requires a default parameter

New submission from paul j3: The documentation for Mutual exclusion https://docs.python.org/3/library/argparse.html#mutual-exclusion needs a note that a mutually exclusive group may contain one positional argument. But that argument must be either nargs='?', or nargs='*'. If '*' it must