Solving environment: failed with initial frozen solve. Retrying with flexible solve.错误

报错
出错原因：PackagesNotFoundError: The following packages are not available from current channels:

https://blog.csdn.net/The_Time_Runner/article/details/99848728虽然没有彻底解决问题，但是可以暂且用一下。但是直接用pip安装版本问题很多。能不用尽可能不用

遇到The following packages are not available from current channels这个问题时的解决方法：
https://blog.csdn.net/Erice_s/article/details/80156191
出现上面Solving environment: failed with initial frozen solve. Retrying with flexible solve.这个错误就因为缺少channel，加上之后就能正确使用了。