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python quit Exit

exit()和exit ()是有区别的,你用个空格干嘛

Python 2.7.7 (default, Jun 3 2014, 01:46:20) [GCC 4.9.0 20140521 (prerelease)] on linux2Type "help", "copyright", "credits" or "license" for more information.>>> quitUse quit() or Ctrl-D (i.e. EOF) to exit>>>使用 quit(), exit()...

Q = input("Enter q to quit the pro!")if Q.lower() == 'q': exit(0)

I think you want to use: exit() # or you may exit(0) quit() is for the command-line mode, you can open a command-line mode by typing 'python' in your command-line from windows (just in case: ctrl+r and then type cmd, you can op...


下面是你的赋值语句 action ="" 然后下面的判断条件都不成立 if action == 'stat': elif action == 'list': elif action =='retr': 无奈只有这个成立else: 判断条件只能走else语句,就只能执行pp.quit()啦



既然"Demo类当中又调用了Quitter",自然Quitter(self)中self是指Demo对象自身。 运行时会调用Quitter的构造方法def __init__(self, parent=None),此时注意刚刚传入的Demo对象会赋给parent变量(注意不是self变量,而是第二个变量parent,因为py...

in = input("input QuIt to quit") if in.upper() == 'QUIT': quit else: print 'continue' pass

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