class Cmd:

# def __init__(self,name):

# self.name = name

def run(self):

while 1:

cmd = input('>>清输入命令>>').strip()

if hasattr(self,cmd):

func = getattr(self,cmd)

func()

def ls(self):

print('ls--->func')

def pwd(self):

print('pwd--->func')

def cat(self):

print('cat--->func')

cmd = Cmd()

cmd.run()