def relative_url(self, other_url, to_application=False):
    url = '%s://%s/' % (self.scheme, self.host)
    return urlparse.urljoin(url, other_url)
Return an absolute (!) URL by combining self.path with other_url.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/webapp/mock_webapp.py/MockRequest.relative_url