Listing only directories?

[Richard]

Hi,

I am using os.listdir(root) to get a file and directory listing of the
'root' directory. However I am trying to filter out only the directories in
this listing.

I have tried the following (after reading up in the manual):

def listDirectories(root):
    [f for f in os.listdir(root) if os.path.isdir(f)]
    return f

but this doesn't seem to do what I want it to, only seeming to return the
name of one of the directories it finds.

Can anyone tell me what I am doing wrong, and if I'm barking up completely
the wrong tree?

Cheers

Richard D