assignee=Noneclosed_at=Nonecreated_at=<Date2013-09-06.09:00:02.098>labels= ['3.7','type-bug','library']title='argparse: default args in mutually exclusive groups'updated_at=<Date2020-12-05.07:19:06.915>user='https://github.com/arigo'

activity=<Date2020-12-05.07:19:06.915>actor='rhettinger'assignee='none'closed=Falseclosed_date=Nonecloser=Nonecomponents= ['Library (Lib)']creation=<Date2013-09-06.09:00:02.098>creator='arigo'dependencies= []files= ['31626','31704']hgrepos= []issue_num=18943keywords= ['patch']message_count=24.0messages= ['197058','197121','197128','197141','197161','197225','197275','197290','197295','197336','197350','197414','197427','211229','212693','292305','292313','293931','299355','307710','307758','307760','307762','307852']nosy_count=7.0nosy_names= ['rhettinger','pitrou','bethard','paul.j3','wolma','louielu','talkless']pr_nums= []priority='normal'resolution=Nonestage='patch review'status='open'superseder=Nonetype='behavior'url='https://bugs.python.org/issue18943'versions= ['Python 2.7','Python 3.5','Python 3.7']