How can I calculate the distances of a set of 3d points with each other using python?

Question

I have a set of 3D points, where I need to find the distances of every point with all other points. So far I came up with the code as below to calculate the distances between tw

Answer 1

How about two loops instead of one?

distances = []
for i in xrange(npoints-1):
    for j in range(i+1, npoints):
        distances.append(np.linalg.norm(x[i]-x[j])