Today we're excited to release a feature that shows any files created by the user's program directly inside the REPL. The feature also updates live when the file changes, and it supports various file types, including text files and graphics like GIFs. Additionally, support has been added for matplotlib in Python 3, allowing users to create interactive graphs. Users can still rewrite their own source files, enabling self-modifying programs, such as a program that increments its own count like the famous "quine" algorithm.