conda旧没用了，不知道什么原因，安装源出问题，报如下错：

Loading channels: failedUnavailableInvalidChannel: HTTP 404 NOT FOUND for channel anaconda/pkgs/main <https://mirrors.aliyun.com/anaconda/pkgs/main>The channel is not accessible or is invalid.You will need to adjust your conda configuration to proceed.
Use `conda config --show channels` to view your configuration's current state,
and use `conda config --show-sources` to view config file locations.

原来的conda源配置如下

  - https://mirrors.aliyun.com/anaconda/pkgs/main/- https://mirrors.aliyun.com/anaconda/pkgs/free/- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/pro- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free

重新删除，再次添加源

$ conda config --remove-key channels$ conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/
$ conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
$ conda config --set show_channel_urls yes$ conda config --show channels
channels:- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/- defaults
# 删除defaults
$ conda config --remove channels defaults

重新配置以后，可以用了