>>> from numpy import *
>>> import itertools
>>> array([x for x in itertools.product(arange(2), arange(3))])
array([[0, 0],
       [0, 1],
       [0, 2],
       [1, 0],
       [1, 1],
       [1, 2]])

In [14]: a = arange(5)

In [18]: r = array(meshgrid(a,a))

In [20]: r.shape
Out[20]: (2, 5, 5)

In [21]: r
Out[21]:
array([[[0, 1, 2, 3, 4],
        [0, 1, 2, 3, 4],
        [0, 1, 2, 3, 4],
        [0, 1, 2, 3, 4],
        [0, 1, 2, 3, 4]],

       [[0, 0, 0, 0, 0],
        [1, 1, 1, 1, 1],
        [2, 2, 2, 2, 2],
        [3, 3, 3, 3, 3],
        [4, 4, 4, 4, 4]]])

In [3]: a = arange(5)

In [4]: a[:,newaxis] * a[newaxis,:]
Out[4]:
array([[ 0,  0,  0,  0,  0],
       [ 0,  1,  2,  3,  4],
       [ 0,  2,  4,  6,  8],
       [ 0,  3,  6,  9, 12],
       [ 0,  4,  8, 12, 16]])

In [6]: a = ones((2,5))

In [7]: a[:,newaxis] * a[newaxis,:]
Out[7]:
array([[[ 1.,  1.,  1.,  1.,  1.],
        [ 1.,  1.,  1.,  1.,  1.]],

       [[ 1.,  1.,  1.,  1.,  1.],
        [ 1.,  1.,  1.,  1.,  1.]]])

In [8]: a.shape
Out[8]: (2, 5)

In [9]: b = a[:,newaxis] * a[newaxis,:]

In [10]: b.shape
Out[10]: (2, 2, 5)

xx = numpy.zeros(n) + x.reshape(n,1)