cmd2.py 文件源码

def cmdloop(self, intro=None):
        """This is an outer wrapper around _cmdloop() which deals with extra features provided by cmd2.

        _cmdloop() provides the main loop equivalent to cmd.cmdloop().  This is a wrapper around that which deals with
        the following extra features provided by cmd2:
        - commands at invocation
        - transcript testing
        - intro banner

        :param intro: str - if provided this overrides self.intro and serves as the intro banner printed once at start
        """
        if self.allow_cli_args:
            parser = optparse.OptionParser()
            parser.add_option('-t', '--test', dest='test',
                              action="store_true",
                              help='Test against transcript(s) in FILE (wildcards OK)')
            (callopts, callargs) = parser.parse_args()

            # If transcript testing was called for, use other arguments as transcript files
            if callopts.test:
                self._transcript_files = callargs

            # If commands were supplied at invocation, then add them to the command queue
            if callargs:
                self.cmdqueue.extend(callargs)

        # Always run the preloop first
        self.preloop()

        # If transcript-based regression testing was requested, then do that instead of the main loop
        if self._transcript_files is not None:
            self.run_transcript_tests(self._transcript_files)
        else:
            # If an intro was supplied in the method call, allow it to override the default
            if intro is not None:
                self.intro = intro

            # Print the intro, if there is one, right after the preloop
            if self.intro is not None:
                self.poutput(str(self.intro) + "\n")

            # And then call _cmdloop() to enter the main loop
            self._cmdloop()

        # Run the postloop() no matter what
        self.postloop()


# noinspection PyPep8Naming