cmd2.py 文件源码

def _cmdloop(self):
        """Repeatedly issue a prompt, accept input, parse an initial prefix
        off the received input, and dispatch to action methods, passing them
        the remainder of the line as argument.
        """
        # An almost perfect copy from Cmd; however, the pseudo_raw_input portion
        # has been split out so that it can be called separately
        if self.use_rawinput and self.completekey:
            try:
                import readline
                self.old_completer = readline.get_completer()
                readline.set_completer(self.complete)
                readline.parse_and_bind(self.completekey + ": complete")
            except ImportError:
                pass
        stop = None
        try:
            while not stop:
                if self.cmdqueue:
                    line = self.cmdqueue.pop(0)
                else:
                    line = self.pseudo_raw_input(self.prompt)
                if self.echo and isinstance(self.stdin, file):
                    self.stdout.write(line + '\n')
                stop = self.onecmd_plus_hooks(line)
        finally:
            if self.use_rawinput and self.completekey:
                try:
                    import readline
                    readline.set_completer(self.old_completer)
                except ImportError:
                    pass
            return stop