[Discuss-gnuradio] python import error

Dear all,

I have a very old problem. I hope someone can help me:

system: Ubuntu 13.04

I installed :
python 2.7.4 version by default
and
sudo apt-get install gnuradio
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I run this:

$ python -c 'from gnuradio import ftw' 

returns this error:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: cannot import name ftw
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I cannot import only this one. The all others are okay.
Do you know how to fix it?

--
nesimi eldarov