Python-两个列表生成矩阵

题目

已知两个列表

lst_1 = [1, 2, 3, 4]
lst_2 = ['a', 'b', 'c', 'd']

将两个列表交叉相乘，生成如下的矩阵

[['1a', '2a', '3a', '4a'],
 ['1b', '2b', '3b', '4b'],
 ['1c', '2c', '3c', '4c'],
 ['1d', '2d', '3d', '4d']]

import pprint

lst_1 = [1, 2, 3, 4]
lst_2 = ['a', 'b', 'c', 'd']

lst_3 = []
for l2 in lst_2:
    tmp = []
    for l1 in lst_1:
        tmp.append(str(l1)+l2)
    lst_3.append(tmp)

#pprint和print功能其实是一样，就是打印的格式看起来不一样而已
pprint.pprint(lst_3)
print(lst_3)