坚持使用 Numpy 数组并使用它的sum() http://docs.scipy.org/doc/numpy/reference/generated/numpy.ndarray.sum.html method:
>>> arr = np.array([[1,2,3,5,4,3],
[5,7,2,4,6,7],
[3,6,2,4,5,9]])
>>> arr.sum(axis=0)
array([ 9, 15, 7, 13, 15, 19])
当然你也可以使用 Python 列表来做到这一点,但它会很慢:
>>> lst = [[1,2,3,5,4,3],
[5,7,2,4,6,7],
[3,6,2,4,5,9]]
>>> map(sum, zip(*lst))
[9, 15, 7, 13, 15, 19]