assignee=Noneclosed_at=Nonecreated_at=<Date2012-12-29.01:39:27.035>labels= ['type-bug','library','3.9','3.10','3.11']title='argparse group nesting lost on inheritance'updated_at=<Date2021-12-10.16:54:57.102>user='https://github.com/dougalsutherland'

activity=<Date2021-12-10.16:54:57.102>actor='iritkatriel'assignee='none'closed=Falseclosed_date=Nonecloser=Nonecomponents= ['Library (Lib)']creation=<Date2012-12-29.01:39:27.035>creator='dougalsutherland'dependencies= []files= ['28473']hgrepos= []issue_num=16807keywords= ['patch']message_count=5.0messages= ['178459','222934','223047','223158','408222']nosy_count=4.0nosy_names= ['bethard','paul.j3','dougalsutherland','iritkatriel']pr_nums= []priority='normal'resolution=Nonestage=Nonestatus='open'superseder=Nonetype='behavior'url='https://bugs.python.org/issue16807'versions= ['Python 3.9','Python 3.10','Python 3.11']