反思：之前看到报错经常是直接复制报错信息去网上搜，但很多情况下报错信息里其实就给出了解决方案
报错信息：

Collecting package metadata (current_repodata.json): done
Solving environment: unsuccessful initial attempt using frozen solve. Retrying with flexible solve.
Collecting package metadata (repodata.json): done
Solving environment: unsuccessful initial attempt using frozen solve. Retrying with flexible solve.

PackagesNotFoundError: The following packages are not available from current channels:

  - orderedset

Current channels:

  - https://repo.anaconda.com/pkgs/main/linux-64
  - https://repo.anaconda.com/pkgs/main/noarch
  - https://repo.anaconda.com/pkgs/r/linux-64
  - https://repo.anaconda.com/pkgs/r/noarch

To search for alternate channels that may provide the conda package you're
looking for, navigate to

    https://anaconda.org

and use the search bar at the top of the page.

报错信息提示：
为搜索你所要寻找的conda库的替换渠道，导航至https://anaconda.org，并在页面顶部的搜索栏搜索。
我要找的包是orderedset,如下图：

划到页面最底部，有conda install的命令，安装即可。