command line interface | Python Fiddle

import sys

class CLI:

def __init__(self):
        self.cmds = {}

def add_cmd(self, cmd, action):
        self.cmds[cmd] = action

def run_cmd(self, cmd, params=[]):
        try:
            self.cmds[cmd](params)

except Exception as e:
            print type(e), ':', e

def start(self):

while(1):
            cmd = raw_input()
            # tokenize
            tokens = cmd.split(' ')
            if tokens[0] in ['exit','quit','bye']:
                print( 'bye' )
                break
            # process
            if len(tokens)>1:
                self.run_cmd( tokens[0], tokens[1:] )
            else:
                self.run_cmd( tokens[0], [] )
            
            sys.stdout.flush()

# very basic Person class
class Person():
    def __init__(self,name):
        self.name=name

# this method will be called via the CLI
    def say_hi(self, params):
        print "Hi, I'm", self.name 
        print '\tparams: ', params

# if we're running this script
if __name__=='__main__':

# instantiate new CLI and Person
    cli = CLI()
    p = Person('Joe')

# link CLI command 'hi' to say_hi method
    cli.add_cmd('hi',p.say_hi)

# run the CLI
    # by default exit on 'exit', 'bye', or 'quit'
    cli.start()

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