pip install numpy -i https://pypi.tuna.tsinghua.edu.cn/simple
pip install numpy -i https://pypi.douban.com/simple
# 清华镜像
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
# 中科大镜像
conda config --add channels https://mirrors.ustc.edu.cn/anaconda/cloud/conda-forge/
conda config --set show_channel_urls yes
# 移除指定源
conda config --remove channels https://mirrors.ustc.edu.cn/