Actual memory used by an object --- How to Determine?

[Avi Kak]

Hello:
  
  My apologies in advance for asking a
  question that probably has been raised
  numerous times already in this newsgroup.
  My Google search did not lead me to an 
  answer I could use.

  Is there a Python module I could use
  to determine the actual amount of memory
  used by a Python object, including the 
  memory used by any subobjects contained
  therein?

Avi Kak (kak at purdue.edu)