Memory Error while constructing Compound Dictionary

[Benjamin Scott]

Hello.

I attempted to build a compound dictionary:

len(Lst)=1000
len(nuerLst)=250
len(nuestLst)=500

Dict={}

for s in Lst:
     Dict[s]={}

for s in Lst:
     for t in nuerLst:
          Dict[s][t]={}

for s in Lst:
     for t in nuerLst:
          for r in nuestLst:
               Dict[s][t][r]={}



I got the following error:

Traceback (most recent call last):
  File "<pyshell#89>", line 5, in -toplevel-
    Dict[s][t][r]=[]
MemoryError


Specs:

Python 2.3.4
XPpro
4 GB RAM


Python was utilizing 2.0 GB when the error was generated.  I have
attempted this task twice with different data sets.  I got the same
error both times.

Thanks in advance for your feedback,

Benjamin Scott