Together with Python e-learning courses this could be a real winner. I say this because back when I tutored compsci students, my most effective method was to use shared (GNU) screen sessions. The pair programming and the ability to see how others worked helped students become confident with Python a lot faster.

Unfortunately back then, students tended to use Windows and setting up Cygwin scared a lot of them before they even got around to doing any programming. A tool like Python Anywhere would definitely be a far more attractive approach if I were to do something similar today.