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#!/usr/bin/env python
# coding=utf-8
"""A simple example demonstrating how to use Argparse to support sub-commands.
This example shows an easy way for a single command to have many subcommands, each of which takes different arguments
and provides separate contextual help.
"""
import argparse
import cmd2
from cmd2 import with_argument_parser
class SubcommandsExample(cmd2.Cmd):
""" Example cmd2 application where we a base command which has a couple subcommands."""
def __init__(self):
cmd2.Cmd.__init__(self)
# sub-command functions for the base command
def foo(self, args):
"""foo subcommand of base command"""
print(args.x * args.y)
def bar(self, args):
"""bar sucommand of base command"""
print('((%s))' % args.z)
# create the top-level parser
base_parser = argparse.ArgumentParser(prog='base')
base_subparsers = base_parser.add_subparsers(title='subcommands', help='subcommand help')
# create the parser for the "foo" command
parser_foo = base_subparsers.add_parser('foo', help='foo help')
parser_foo.add_argument('-x', type=int, default=1, help='integer')
parser_foo.add_argument('y', type=float, help='float')
parser_foo.set_defaults(func=foo)
# create the parser for the "bar" command
parser_bar = base_subparsers.add_parser('bar', help='bar help')
parser_bar.add_argument('z', help='string')
parser_bar.set_defaults(func=bar)
@with_argument_parser(base_parser)
def do_base(self, args):
"""Base command help"""
try:
# Call whatever sub-command function was selected
args.func(self, args)
except AttributeError:
# No sub-command was provided, so as called
self.do_help('base')
if __name__ == '__main__':
app = SubcommandsExample()
app.cmdloop()
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