how to list all installed modules

[Peter Otten]

harryos wrote:

> Is there a way to list all the installed modules in my python
> installation.I recently installed pygame and when i tried to import it
> like
>>>import pygame
> it complained that no such module was found.I can see the pygame
> directory in F:\Python25\Lib\site-packages in my machine,but am unable
> to import the module.So I was wondering if there is a way to list all
> the installed modules

>>> help("modules")

may help to get a list of modules (if it doesn't fail with an exception as
over here). 

Regarding the original problem, do you have multiple Python installations? 
If so, you may accidentally be running the "wrong" python.

Peter