SMRTR ProgrammingOct 15, 2025Lobsters

Modifying the Python REPL

SMRTR summary

Python users who frequently work in the REPL can now customize it with keyboard shortcuts and syntax highlighting using new features in Python 3.13 and 3.14. A developer created the pyrepl-hacks library to streamline these modifications, allowing custom shortcuts like Home/End key rebinding, line swapping with Alt+Up/Down, and quick data insertion commands. The customizations work through a PYTHONSTARTUP file that runs automatically when launching any Python REPL, though they rely on undocumented Python internals that may change in future versions.

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