BUG :failed with repodata from current_repodata.json, will retry with next repoda

在anaconda里面再次冲洗进行安装pytorch 时，（具体步骤可见安装笔记），报错：
failed with repodata from current_repodata.json, will retry with next repoda
应该是清华源的问题，解决方法：

解决方法
```bash
conda config --add channels conda-forge
conda config --set channel_priority strict
conda config --set channel_priority flexible