InstantPython

A lightweight Python IDE that runs your script the moment you hit Run.

Download on the Mac App Store Get it from Microsoft Store

InstantPython running on macOS — macOS

InstantPython running on Windows — Windows

Live two-pane layout — editor on the left, output on the right.
Run instantly with a single click, no setup or configuration.
Interactive input() works directly in the output panel.
Native apps for macOS and Windows. Python is bundled — nothing to install.