python中的深拷贝

最早接触深拷贝是在C++中，深拷贝需要自己实现。现在用了python，感觉好多了。示例代码如下：

import copy
import random

a = [i for i in range(100)]
a1 = copy.deepcopy(a)
a2 = a

random.shuffle(a1)

print("a == a1 -> ", a == a1)
print("a == a2 -> ", a == a2)