IDLE, the default python editor does not have a bookmarking facility.
Nor does there seem to be a page dedicated to python IDLE plug-ins.
So...
Bookmarking Plug-in for IDLE - a simple book-marking plug-in for IDLE.
Lets you hit F2 and add a bookmark. See
http://www.atug.com/andypatterns/idle_bookmarker.htm
I am also hosting a couple of other IDLE plug-ins which do not seem to
have a home, namely:
Smart Templates - lets you type a few letters, hit ALT-J and template
code is squirted into your idle editor. You can then press ALT-H to
jump between parts of the new template text.
Recently Used Files list - remembers the last n files you have opened
in IDLE.
http://www.atug.com/andypatterns/idle_plugins.htm
-Andy Bulka
http://www.atug.com/andypatterns