Python: Add elements from 1D array to nD array with Numpy

Question

I have 2 ND arrays:

x = zeros(shape=(N,9)); vx = zeros(shape=(N,9))

I also have 2 1D arrays:

x0 = [] # array with 9 elements
vx0 = [] # array with 9 elements

I want the following output:

x: [[ x0[0]  0.  0. ...,  0.  0.  0.][ x0[1]  0.  0. ...,  0.  0.  0.]... ]etc
vx : [[ vx[0]  0.  0. ...,  0.  0.  0.][ vx[1]  0.  0. ...,  0.  0.  0.]...]etc

I tried:

for k in range(8):
    x[k:0] = x[k:0] + x0[k]
    vx[k:0] = vx[k:0] + vx0[k]

print x

x[0] will be the first array in the x-array. x[0:0] will be the first element in the first list in the x-array

I get following output:

[[ 0.  0.  0. ...,  0.  0.  0.]
 [ 0.  0.  0. ...,  0.  0.  0.]
 [ 0.  0.  0. ...,  0.  0.  0.]
...] etc

But x0 contains floats different from 0.

Can someone help me with my issue or point me in the right direction?

EDIT: I used the Numpy module