Random numbers in parallel calculations

edit

Assume I have a function that requires random number (noise) like:

@parallel
def foo(i):
    print np.random.random()

4 sequential runs yield desired output:

for i in range(4):
    foo(i)
0.961718217227
0.909042125122
0.736138778296
0.149902522071

But the parallel run calculates only one random value:

list(foo(range(4)))
0.633760965726
0.633760965726
0.633760965726
0.633760965726
[(((0),{}),None),(((2),{}),None),(((1),{}),None),(((3),{}),None)]

How do I properly generate random values from within parallel function?