openstack - python-novaclient source code explanation -

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i trying figure out python-novaclient source code , need more familiar python. code below exactly? how init method in class novaclientargumentparser being used.

from shell.py program line 197:

class novaclientargumentparser(argparse.argumentparser):       def __init__(self, *args, **kwargs):         super(novaclientargumentparser, self).__init__(*args, **kwargs)

the class called somewhere below:

class openstackcomputeshell(object):      def get_base_parser(self):         parser = novaclientargumentparser(             prog='nova',             description=__doc__.strip(),             epilog='see "nova command" '                    ......                   ......              def main(self, argv):               # parse args once find version , debug settings              parser = self.get_base_parser()               ..........               ..........

thanks al


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