Recursion. 

if os.path.isdir(d): describeDirectory(d)

Since your printing from the function itself, you may want to add a 
level or depth arguement with a default value of 0.

def describeDirectory(directory, level=0):

Then call the function recursively with describeDirectory(d,level+1)

Use the level variable in the print statements for proper indentation.

Or something like that,
-Steve

Christopher Spears wrote:
>  I am trying to write a function that takes a
>  directory's name, finds any subdirectories, and then
>  prints out the size of the files in all found
>  directories.
> 
>  import os, os.path
> 
>  def describeDirectory(directory):
>      dirList = [directory]
>      for d in os.listdir(directory):
>          if os.path.isdir(d):
>              dirList.append(d)
>      for d in dirList:
>          print d, ':'
>          for f in os.listdir(d):
>              name = os.path.join(d, f)
>              print '\t', name, 'SIZE: ',
>  os.path.getsize(name)
> 
>  describeDirectory('.')
> 
>  Here is the output:
> 
>    
>  . :
>  	.\changePeppers.py SIZE:  915
>  	.\describeDirectory.py SIZE:  549
>  	.\describeDirectory.pyc SIZE:  514
>  	.\describeDirectory01.py SIZE:  388
>  	.\error_log SIZE:  778
>  	.\makezeros.py SIZE:  147
>  	.\makezeros.pyc SIZE:  481
>  	.\modPrompt.py SIZE:  342
>  	.\modPrompt.pyc SIZE:  698
>  	.\output SIZE:  387
>  	.\pepper.txt SIZE:  601
>  	.\testFiles SIZE:  0
>  	.\textWrapper.py SIZE:  619
>  	.\textWrapper.pyc SIZE:  1092
>  	.\timings.py SIZE:  567
>  	.\timings.pyc SIZE:  733
>  testFiles :
>  	testFiles\renameFiles.py SIZE:  351
>  	testFiles\some_date SIZE:  29
>  	testFiles\stupid_text.txt SIZE:  12
>  	testFiles\testDir SIZE:  0
> 
>  As you see, the problem is that there is another
>  directory under testFiles called testDir, but the
>  function doesn't check the directory for files.  The
>  function needs to find every directory (including
>  subdirectories within directories).  Any hints?  
> 
>  I'm starting to wonder if I should abandon trying to
>  do this with one function.  For example, I could
>  create one function that finds every directory.  This
>  information would then be passed to another function
>  that returns the files' sizes.
>  _______________________________________________
>  Tutor maillist  -  Tutor@[...].org
>  http://mail.python.org/mailman/listinfo/tutor
> 
> 
>    
_______________________________________________
Tutor maillist  -  Tutor@[...].org
http://mail.python.org/mailman/listinfo/tutor