Method error

Lib/optparse.py:1551–1559

error(msg : string) Print a usage message incorporating 'msg' to stderr and exit. If you override this in a subclass, it should not return -- it should either exit or raise an exception.

(self, msg)

        sys.exit(status)

    def error(self, msg):
        """error(msg : string)

        Print a usage message incorporating 'msg' to stderr and exit.
        If you override this in a subclass, it should not return -- it
        should either exit or raise an exception.
        """
        self.print_usage(sys.stderr)
        self.exit(2, "%s: error: %s\n" % (self.get_prog_name(), msg))

    def get_usage(self):
        if self.usage: