更换Anaconda的下载源为国内源的办法

1、目前国内可用的anaconda下载源

清华镜像anaconda源：

channels:
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/pytorch/
ssl_verify: true

上海交大anaconda镜像源：

channels:
  - https://mirrors.sjtug.sjtu.edu.cn/anaconda/pkgs/main/
  - https://mirrors.sjtug.sjtu.edu.cn/anaconda/pkgs/free/
  - https://mirrors.sjtug.sjtu.edu.cn/anaconda/cloud/conda-forge/
ssl_verify: true

中科大anaconda镜像源

channels:
  - https://mirrors.ustc.edu.cn/anaconda/pkgs/main/
  - https://mirrors.ustc.edu.cn/anac