gistfile1.py

    response = None
    for x in range(self.retries + 1):
        try:
            response = session.get(
                request.url, headers=headers, timeout=(self.config.connect_timeout,
                                                       self.config.read_timeout)
            )
        except httplib.BadStatusLine:
            continue
    if response is None:
        raise DownloadFailed()