[Tutor] ImportError: No module named numarray

[enas khalil]

when i write a code to import some module like the following :
 
 
from nltk.probability import ConditionalFreqDist
 
I got the error : 
 
Traceback (most recent call last):
  File "C:\Python24\toky.py", line 1, in -toplevel-
    from nltk.probability import ConditionalFreqDist
  File "C:\Python24\Lib\site-packages\nltk\probability.py", line 56, in -toplevel-
    import types, math, numarray
ImportError: No module named numarray
can you please tell me the cause 

		
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