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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def all_distances(coords1, coords2):
 """ 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] """

    c1 = np.array(coords1)
    c2 = np.array(coords2)
    z = (c1[:, None, :] - c2[None, :, :]) ** 2
    return np.sum(z, axis=-1) ** 0.5