code: def all_distances(coords1, coords2):
      
      c1 = np.array(coords1)
      c2 = np.array(coords2)
      z = (c1[:, None, :] - c2[None, :, :]) ** 2
      return np.sum(z, axis=-1) ** 0.5
docs: Returns the distances between two lists of coordinates
  
      Args:
          coords1: First set of cartesian coordinates.
          coords2: Second set of cartesian coordinates.
  
      Returns:
          2d array of cartesian distances. E.g the distance between
          coords1[i] and coords2[j] is distances[i,j]