The problem of numpy with python-numpy

When I tried to configure and check the installation procedure of GNU radio platform, "make check",
I have the following problem:

"ImportError: No module named numpy"
"failed test"

But actually, there is a numpy as named "python-numpy", which can not be recognized by the system.
One way is to install another numpy from here:
http://sourceforge.net/project/showf...kage_id=175103
The source (numpy-1.1.1.tar.gz) can be installed (after unpack) with
# 'python setup.py install'

Restart the configuration and make procedure, the problem is clear!

Thanks for knudfl's help!