recipe-355319-1.py

#!/usr/bin/env python
# codeing: utf-8
import readline
import shlex


if __name__ == '__main__':
        
    print 'Enter a command to do something, e.g. `create name price`.'
    print 'To get help, enter `help`.'

    while True:
        args = shlex.split(raw_input('> '))
        if len(args) == 1:
            cmd = args[0]
        if len(args) == 3:
            cmd, name, cost = args

        if cmd == 'exit':
            break

        elif cmd == 'help':
            print('...')

        elif cmd == 'create':
            cost = int(cost)
            # ...
            print('Created "{}", cost ${}'.format(name, cost))

        # ...

        else:
            print('Unknown command: {}'.format(cmd))