pip安装时出现下面错误：
ERROR: Cannot unpack file C:\Users\Administrator\AppData\Local\Temp\pip-unpack-9kvslfo2\simple.html (downloaded from C:\Users\Administrator\AppData\Local\Temp\pip-req-build-pl0cid7e, content-type: text/html); cannot detect archive format
ERROR: Cannot determine archive format of C:\Users\Administrator\AppData\Local\Temp\pip-req-build-pl0cid7e
使用该命令客园解决！
pip install pylint -i "http://pypi.doubanio.com/simple/" --trusted-host pypi.doubanio.com