python中给定两个列表，怎么找出他们相同的元素和不同的元素？

如列表a和列表b，则相同元素为1，不同元素为2，3，4，5，6

a = [1, 2, 3, 4]

b = [1, 5, 6]

1. 位运算

print(set(a) & set(b))

print(set(a) ^ set(b))  # 异或

2. 列表推导式

same = [x for x in a if x in b]

print(same)

diff = [y for y in (a + b) if y not in same]

print(diff)