def getChild(self, path, request):
        """
        Create and return a proxy resource with the same proxy configuration
        as this one, except that its path also contains the segment given by
        C{path} at the end.
        """
        return ReverseProxyResource(
            self.host, self.port, self.path + b'/' + urlquote(path, safe=b"").encode('utf-8'),
            self.reactor)

        Create and return a proxy resource with the same proxy configuration
        as this one, except that its path also contains the segment given by
        C{path} at the end.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/proxy.py