Questions are as follows,
Baidu a moment to find a solution
The reason is not connected to the installation source abroad, enter the domestic installation source lines of code manually download
E.g:
pip install itchat -i https://pypi.tuna.tsinghua.edu.cn/simple
Tsinghua https://pypi.tuna.tsinghua.edu.cn/simple source mounted e.g.
Watercress http://pypi.doubanio.com/
