python安装pandas库 retrying_Python资源安装过程出现Retrying (Retry(total=4, connect=None, read=None, redirect=No.
问题:安装包出现Retrying(Retry(total=4,connect=None,read=None,redirect=None,status=None))afterconnectionbrokenby'ConnectTimeoutError解决办法:pipinstallselectivesearch-ihttp://pypi.douban.com/simple--trusted-hostp