pudb

Ah memories... I once had 100K Python 2.x codebase to maintain. No docs, no tests and then being required to add features. Had to use the debugger[1] to make sense of the codebase and types, formats etc. Sheer madness and such a waste of time... To this day, I'm baffled by the dynamic language folks who cannot get their head around how strictness/rigor (via a good expressive type system) actually makes maintenance easier and more importantly: cheaper. [1] https://github.com/inducer/pudb

A more traditional debugger for Python. https://github.com/inducer/pudb

You can check out download stats stats for Urwid on PyPI Stats [1], that should give you a decent idea of its popularity. Also check out the list of applications built with Urwid [2]. Probably the two most popular applications that use Urwid are bpython [3] (an alternative Python REPL that is really nice), and PUDB [4] (a nice Python debugger that is reminiscent of Borland's Turbo Pascal). I use bpython all the time, it's a lifesaver, and I occasionally fire up PUDB when I am really stuck on something. I've used Urwid in a couple of projects (most notably Zeitzono [5]), it's nice in that it's fairly high level and gives you a number of helpful widgets to work with. Starting with it from scratch is a little daunting, so you should look at existing projects to see how they are using the library. Also, I believe Urwid development has slowed

If you’re not using an IDE, then I’d highly recommend trying PuDB: https://github.com/inducer/pudb/blob/master/README.rst