[Tutor] Idle - ImportError: No module named numpy

[Markos]

Hi,

I'm beginning to study the numpy.

When I open a terminal (Debian Squeeze) and run the python interpreter 
the command "import numpy as np" run without errors.

But when I run the same command on idle3 the following error appears.

 >>> import numpy as np
Traceback (most recent call last):
   File "<pyshell#0>", line 1, in <module>
     import numpy as np
ImportError: No module named numpy

How configure idle to load the numpy module?

Thanks,
Markos