import random

train_x = [(1, 2), (3, 4), (5, 6), (7, 8)]
train_y = [(1, 'a'), (3, 'b'), (5, 'c'), (7, 'd')]
for i in range(5):
    randnum = random.randint(0, 100)
    random.seed(randnum)
    random.shuffle(train_x)
    random.seed(randnum)
    random.shuffle(train_y)
    print(train_x)
    print(train_y)
    print('-'*50)

结果：

结果

可以发现每次两个list以相同的顺序打乱。
将randnum = random.randint(0, 100)改成randnum =1，再次运行代码：

结果