集合

list_1 = set([1,2,3,4,5,6])
list_2 = set([5,6,7,8,9,10])

print(list_1.intersection(list_2))     #交集
print(list_1.union(list_2))            #并集
print(list_1.difference(list_2))       #差集（保留list_1里有，list_2没有的）

list_3 = set([1,2,3])
print(list_3.issubset(list_1))          #子集
print(list_1.issuperset(list_3))        #父集

print(list_1.symmetric_difference(list_2))   #对称差集，去重合并,Return the symmetric difference of two sets as a new set

list_4 =set([4,5,6])
print(list_3.isdisjoint(list_4))        #判断list_3 and list_4是否有交集（return True is two set have a null intersection）