Python threads and Numeric/SciPy exploit Dual Core ?

[robert]

Fredrik Lundh wrote:

> "robert" wrote:
> 
> 
>>Simple Python code obviously cannot use the dual core by Python threads.
>>Yet, a program drawing CPU mainly for matrix computations - preferably
>>with Numeric/SciPy -  will this profit from a dual core when using 2 (or
>>more) Python threads?
> 
> 
> as long as the binding releases the GIL, sure.

Thus - does Numeric/SciPy release it?
The same q about the orange (data mining) lib.

Robert