def parse_url_path(self, url_path):
        """Converts a static URL path into a filesystem path.

        ``url_path`` is the path component of the URL with
        ``static_url_prefix`` removed.  The return value should be
        filesystem path relative to ``static_path``.

        This is the inverse of `make_static_url`.
        """
        if os.path.sep is not "/":
            url_path = url_path.replace("/", os.path.sep)
        return url_path
dataset/ETHPy150Open RobotWebTools/rosbridge_suite/rosbridge_server/src/tornado/web.py/StaticFileHandler.parse_url_path/operator `!=` -> `is not`