missing collections module

[Shea Martin]

I am getting this error in a python script:

   File "/usr/sfw/lib/python2.3/site-packages/BTL/cache.py", line 12, in ?
     from collections import deque
ImportError: No module named collections

Where can I download the python collection module?  I am no python 
programmer, but I can build/install python packages if I know where to 
get them.

Thanks,

~S