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#!/usr/bin/pythonfrom cmd import Cmdimport osimport sysclass cli(Cmd):        prompt ='tao>'        intro = "welcom test"        def __init(self):                Cmd.__init__(self)        def do_hello(self,args):                print "hello",args        def do_exit(self,args):                print "exit"                return True        def default(self,args):                print "pardon ?"if __name__ == '__main__':        try:                test=cli()                test.cmdloop()        except:                exit()测试结果如下：tiantao@BoardServer2:~$ python cmd_test.pywelcom testtao>hellohellotao>hello taohello taotao>qwerpardon ?tao>exitexit

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