Python Shell Emulator

commands.py

def help():
   print("HELP!!!")

def account_info():
   print("account infoz:!!!")

output

manipulate@hf ~$  help
HELP!!!
manipulate@hf ~$  account_info
account infoz:!!!

shellemu.py

import commands

commands = {'^help$':            commands.help,
            '^account_info(.*)': commands.account_info}

while True:
   print acctusr + "@hf ~$ ",
   command = raw_input()
   for correct_command in commands.keys():
      search = re.search(correct_command, command)
      if search:
         commands.get(correct_command)()