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

https://blog.csdn.net/The_Time_Runner/article/details/99848728, although not completely solve the problem, but you can use for a moment. But installing the version directly with PIP is problematic. I don’t have to do

as much as possible

The following packages are not available from current channels.

https://blog.csdn.net/Erice_s/article/details/80156191 appear above Solving environment: failed with initial frozen solve. Retrying with flexible solve. This error is due to the lack of a channel, which can then be used correctly.