The tech demo is available for anyone to download: https://github.com/MarcuzD/PyShell27/releases

The wrappers for CTRULIB and SF2DLIB aren't implemented, however. They might not be in the near future, as MarcusD moves on to other projects. However, it shouldn't be too hard to make your own wrappers with SWIG or the C-Python API or something like that. If you're lucky, someone else might release wrappers in the near future to use with the interpreter.

Since it depends on you and what you want to do, there is no "best" that we can point you to. Try googling for "python online".

I'm a fan of repl.it as well. I created a short series of beginner Python lessons using that site on YouTube called Basic Python 3 for Beginners. I made the videos to give my (high school) students a preview of the topics we are working on this year in class.

l have also created a companion course page for these videos as well. It has links to the videos and short review quizzes for each topic. The course can be found below:

Python for Beginners 1 - Python Language Basics

You can view the course materials as a guest, but to preview and take the quizzes, you will need to login with one the demo account below:

Username: reddit.one Password: learnpython

I hope you, or someone else, finds this helpful.