1.查看当前环境下的源
conda config --show-sources
2.换清华源
conda config --add channels /anaconda/pkgs/free/
conda config --add channels /anaconda/pkgs/main/
conda config --add channels /anaconda/cloud/menpo/
conda config --add channels /anaconda/cloud/bioconda/
conda config --add channels /anaconda/cloud/conda-forge
conda config --add channels /anaconda/cloud/msys2/
conda config --add channels /anaconda/cloud/pytorch/
conda config --set show_channel_urls yes
3.恢复默认源
conda config --remove-key channels