Where to find information about collections of things

I"m trying to iterate through a menu with a number of items, and simply want
to enable to false each item, but can't discover the syntax.

I've come to understand Chris's example with the panels ie

self.Panels = {}

for Panel in self.Panels.values():

for ID in self.Panels:
            CurrentPanel = self.Panels[ID]]

etc.

I've tried every combinatino and permutation I can think of to describe the
collection of menuitems, searched the wiki, the docs etc to no avail.

It there anywhere that this sort of stuff is described/listed?

Any help appreciated.

Richard