def opt_version(self):
        """Display version information"""
        from .. import __version__
        print "Petmail version: %s" % __version__
        import twisted.copyright
        print twisted.copyright.version % "Twisted version: %s"
        sys.exit(0)
dataset/ETHPy150Open warner/petmail/petmail/scripts/runner.py/Options.opt_version/swapped operands of `%`