使用np.arange(len(V))用于索引的行数和V列的：
In [110]: M = [[ 2, 4, 1, 8],
.....: [3, 5, 7, 1],
.....: [2, 5, 3, 9],
.....: [1, 2, 3, 4]]
In [111]: V = [2, 1, 0, 1]
In [112]:
In [112]: M = np.array(M)
In [113]: M[np.arange(len(V)),V]
Out[113]: array([1, 5, 2, 2])
602392714
清零编程群