返回一个扑克牌列表，里面有52项，每一项是一个元组

例如：[(‘红心’，2),(‘草花’，2), …(‘黑桃’，‘A’)]

def func():    result = []    huase = ["红心","黑桃","花草","方片"]    dianshu = [2,3,4,5,6,7,8,9,10,"J","Q","K","A"]    for hua in huase:        for dian in dianshu:            result.append((hua,dian))    return resultprint(func())

对比一下 九九乘法表 都是利用两层循环实现的

for i in range(1,10):    for j in range(1,i+1):        print(i,"*",j,"=",i*j,end='  ')    print()

1 * 1 = 1

2 * 1 = 2 2 * 2 = 4

3 * 1 = 3 3 * 2 = 6 3 * 3 = 9

4 * 1 = 4 4 * 2 = 8 4 * 3 = 12 4 * 4 = 16

5 * 1 = 5 5 * 2 = 10 5 * 3 = 15 5 * 4 = 20 5 * 5 = 25

6 * 1 = 6 6 * 2 = 12 6 * 3 = 18 6 * 4 = 24 6 * 5 = 30 6 * 6 = 36

7 * 1 = 7 7 * 2 = 14 7 * 3 = 21 7 * 4 = 28 7 * 5 = 35 7 * 6 = 42 7 * 7 = 49

8 * 1 = 8 8 * 2 = 16 8 * 3 = 24 8 * 4 = 32 8 * 5 = 40 8 * 6 = 48 8 * 7 = 56 8 * 8 = 64

9 * 1 = 9 9 * 2 = 18 9 * 3 = 27 9 * 4 = 36 9 * 5 = 45 9 * 6 = 54 9 * 7 = 63 9 * 8 = 72 9 * 9 = 81