News Flash:
We take full advantage of Scintilla from Neil Hodgson (see scintilla.org) This offers a much better interface, including Visual C++/VB type indicators for breakpoints in the left column, etc
This document gives a general overview of the Pythonwin Debugger package.
This package is a general-purpose debugger for Python on Win32 platforms. It is a full-blown GUI debugger with the following features:
There used to be more out-of-date stuff here, but not any more :-) The tutorial is also a little out of date, but is worth following along with (but as you notice the old screen shots, say a praise for Scintilla!)