requests.exceptions.ConnectionError: HTTPSConnectionPool(host='github.com', port=443):

报错：

requests.exceptions.ConnectionError: HTTPSConnectionPool(host='github.com', port=443): Max retries exceeded with url: /session (Caused by ProxyError('Cannot connect to proxy.', NewConnectionError(': Failed to establish a new connection: [Errno 111] Connection refused',)))

将代理方法改成无

还无效则在terminal下输入unset https_proxy 和unset http_proxy