I see that Python recently upgraded their 3.7 and 3.8 version of the language, but they only offer the .tgz and the .tar.xz files, not the executable installer. How can I upgrade to these versions? I tried what was said here without any success. But the question was asked 5 years ago so I am thinking that things have changed since then.
You can use the below method:
conda create --name project-env python=3.x
You can also look at an alternative method to install python versions Install python version