Today we're excited to release a feature which shows any files your program creates directly inside the REPL. And any time that file changes it will be updated live in the editor. This can be anything from a text file to a gif.
We also added support for matplotlib in python3 so you can make pretty graphs and watch them update live.
And we don't stop you from rewriting your own source file so you can write a program which modifies itself, like this counting quine.