PackagesNotFoundError: The following packages are not available from current channels

因为要用到lifelines 包，在cmd中使用conda install lifelines ,显示如下错误：

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

- lifelines

Current channels:

- https://conda.anaconda.org/derickl/win-64
- https://conda.anaconda.org/derickl/noarch
- https://repo.anaconda.com/pkgs/main/win-64
- https://repo.anaconda.com/pkgs/main/noarch
- https://repo.anaconda.com/pkgs/free/win-64
- https://repo.anaconda.com/pkgs/free/noarch
- https://repo.anaconda.com/pkgs/r/win-64
- https://repo.anaconda.com/pkgs/r/noarch
- https://repo.anaconda.com/pkgs/msys2/win-64
- https://repo.anaconda.com/pkgs/msys2/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.

解决办法：

首先输入 anaconda search -t conda lifelines,这样子就会显示可用的版本 ，我的显示效果如下所示：

选择适合自己的版本，比如，我选择的就是conda-forge/lifelines,在命令行中输入：

conda install -c https://conda.anaconda.org/conda-forge lifelines, 注意conda-forge和lifelines之间没有“/”。