conda 切换源为清华的,加快下载速度
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/
conda config --set show_channel_urls yes
文章来自:https://www.cnblogs.com/zdj8023/p/12064816.html