https://medium.com/codefile/four-ways-to-get-python-5a3d611b7e82

Many of the leading AI frameworks use Python, e.g. Tensorflow from Google and Apache’s MX Net.

There are two versions of Python, Python2 and Python3. Python3 is obviously the latest one but is not completely compatible with the old version, so while version 2 is still available, 3 is the one that is being developed.