原文:安裝xlrd包的時候,總是報錯:ERROR: Could not install packages due to an EnvironmentError: HTTPConnectionPool (host='127.0.0.1', port=8888):。。。

安裝xlrd包的時候,總是報錯:ERROR: Could not install packages due to an EnvironmentError: HTTPConnectionPool host . . . , port : Max retries exceeded with url: http: pypi.douban .com simple Caused by ProxyError C ...

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