This report guides you through the implicit decision tree of choosing what Python version, implementation, and distribution is best suited for you. It weighs and discusses the merits of each of these choices, and briefly discusses the reasons each option exists.
Even at the end of 2019 this book is still relevant.
I found this book as a good intro and succinct reading for different versions of Python: Jython, CPython, IronPython, etc. Also, it covers cases of port code from Python2 and Python3 which is still relevant nowadays.
I definitely recommend it for 2 types of readers: - You need short intro about porting your code from 2.x to 3.x Python version - You want short intro about Python flavours and compatibility with other languages and platforms