在python3.7.1中安装dlib 19.16.0的过程中出现了此问题 我使用的conda版本是（conda 4.5.12）
(base) C:\Users\TAQA>conda install dlib=19.16.0
解决环境：失败
PackagesNotFoundError：当前频道不提供以下软件包：
- dlib=19.16.0当前频道：
- https://conda.anaconda.org/menpo/win-64 - https://conda.anaconda.org/menpo/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要搜索可能提供conda软件包的备用渠道 寻找，导航到
https://anaconda.org，然后使用页面顶部的搜索栏。
请帮助我