How to use the subcommand using argparse module of python

I am writing a and would like to have two sub commands as 'backup' and 'restore'. with associated option. e.g. backup -e prod -r east restore -e prod -m 1.txt -d 2.txt

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Appreciate if someone can help with how to get the above done using the argparse module ( ). Any sample code is very much appreciated
Who is Participating?
Walter RitzelSenior Software EngineerCommented:
Here it goes.
import argparse
parser = argparse.ArgumentParser(prog='PROG')
subparsers = parser.add_subparsers(help='sub-command help')
parser_a = subparsers.add_parser('backup', help='backup help')
parser_a.add_argument('-e', help='e help')
parser_a.add_argument('-r', help='r help')

parser_b = subparsers.add_parser('restore', help='restore help')
parser_b.add_argument('-e', help='e help')
parser_b.add_argument('-m', help='m help')
parser_b.add_argument('-d', help='d help')

# parse some argument lists
print parser.parse_args(['restore', '-e','prod'])

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