pudb
PuDB is a full-screen, console-based visual debugger for Python.
Its goal is to provide all the niceties of modern GUI-based debuggers in a more lightweight and keyboard-friendly package. PuDB allows you to debug code right where you write and test it–in a terminal. If you’ve worked with the excellent (but nowadays ancient) DOS-based Turbo Pascal or C tools, PuDB’s UI might look familiar.
I remember using Turbo C’s debugger many, many moons ago and it was mighty piece of software. So if PuDB is even a patch on it, it’s good.