Python 3.14 Preview: REPL Autocompletion and Highlighting

Python 3.14 introduces improvements to its interactive shell (REPL), bringing a more modern, colorful, and user-friendly environment. The new features make the Python 3.14 REPL a powerful tool for experimentation. Whether you’re testing a quick idea, exploring a new library, or debugging a tricky snippet, the REPL gives you instant feedback—no files, no setup, just type and run.

The default CPython REPL intentionally kept things minimal. It was fast, reliable, and available everywhere, but it lacked the richer, more ergonomic features found in tools like IPython or ptpython. That began to change in Python 3.13, when CPython adopted a modern PyREPL-based shell by default, adding multiline editing, better history navigation, and smarter Tab completion.

By