subparse.py

import argparse

# Set up the main parser
parser = argparse.ArgumentParser(description='An awesome program')

# And the subparser
subparsers = parser.add_subparsers(
    title='subcommands',
    description='valid subcommands',
    help='additional help')

# The first subparser 'Create'
parser_create = subparsers.add_parser('create')
# Store the result in which for a conditional check later 
parser_create.set_defaults(which='create')

# Add the first arg to create (First Name)
parser_create.add_argument(
    '--first_name',
    required=True,
    help='First Name')

# Add the second arg to create (Last Name)
parser_create.add_argument(
    '--last_name',
    required=True,
    help='Last Name')

# The Second subparser 'Delete'
parser_delete = subparsers.add_parser('delete')
parser_delete.set_defaults(which='delete')

parser_delete.add_argument(
    'id', help='Database ID')

args = vars(parser.parse_args())

if args['which'] == 'create':
    print "Creating {} {}".format(args['first_name'], args['last_name'])
else:
    print "Deleting {}".format(args['id'])