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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 get_band_qpoints(band_paths, npoints=51, rec_lattice=None):
 """Generate qpoints for band structure path Note ---- Behavior changes with and without rec_lattice given. Parameters band_paths: list of array_likes Sets of end points of paths dtype='double' shape=(sets of paths, paths, 3) example: [[[0, 0, 0], [0.5, 0.5, 0], [0.5, 0.5, 0.5]], [[0.5, 0.25, 0.75], [0, 0, 0]]] npoints: int, optional Number of q-points in each path including end points. Default is 51. rec_lattice: array_like, optional When given, q-points are sampled in a similar interval. The longest path length divided by npoints including end points is used as the reference interval. Reciprocal basis vectors given in column vectors. dtype='double' shape=(3, 3) """


    npts = _get_npts(band_paths, npoints, rec_lattice)
    qpoints_of_paths = []
    c = 0
    for band_path in band_paths:
        nd = len(band_path)
        for i in range(nd - 1):
            delta = np.subtract(band_path[i + 1], band_path[i]) / (npts[c] - 1)
            qpoints = [delta * j for j in range(npts[c])]
            qpoints_of_paths.append(np.array(qpoints) + band_path[i])
            c += 1

    return qpoints_of_paths