The current implementation of 6.170 is "build a webapp in python". I seem to recall that they were using Flask, but that might have changed as this is pretty new.

6.00 is a class on programming in python. There are IAP (January) classes on C++, python, and a few more.

Other than that, though, it's all in the context of "do a project with language x" and not "learn language x."