python中如何进行集合交集运算？

lis1,lis2=[1,2],[1]

print(list(set(lis1) & set(lis2)))

输出为：[1]

lst_a = [1,2,3,4,5]

lst_b = [3,4,5,6,7]

lst_c = [x for x in lst_b if x in lst_a]

# lst_c = [x for x in lst_a if x in lst_b]

print(lst_c)

[3, 4, 5]

L = [[1,2,3,4], [2,3,4,5], [3,4,5,6],[1,2,3,4,5,6]]

P = set(L[0]).intersection(*L[1:])

print(P)

{3, 4}