def _build_css_path(self, prefix=''):
        """
        Constructs a relative path from a given prefix within the container.
        URLs and paths starting with '/' are not modified.

        :param prefix: The prefix for the container listing.
        """
        if self._listings_css.startswith(('/', 'http://', 'https://')):
            css_path = quote(self._listings_css, ':/')
        else:
            css_path = '../' * prefix.count('/') % quote(self._listings_css)
        return css_path
dataset/ETHPy150Open openstack/swift/swift/common/middleware/staticweb.py/_StaticWebContext._build_css_path/operator `+` -> `%`