Python argparse : How can I get Namespace objects for argument groups separately?

Question

I have some command line arguments categorized in groups as follows:

cmdParser = argparse.ArgumentParser()
cmdParser.add_argument(\'mainArg\')

groupOne = cm         


        

Answer 1

you can do it in this way:

import argparse
parser = argparse.ArgumentParser()

group1 = parser.add_argument_group('group1')
group1.add_argument('--test1', help="test1")

group2 = parser.add_argument_group('group2')
group2.add_argument('--test2', help="test2")

args = parser.parse_args('--test1 one --test2 two'.split())

arg_groups={}

for group in parser._action_groups:
    group_dict={a.dest:getattr(args,a.dest,None) for a in group._group_actions}
    arg_groups[group.title]=argparse.Namespace(**group_dict)

This will give you the normal args, plus dictionary arg_groups containing namespaces for each of the added groups.

(Adapted from this answer)