Python: Collections and their operations

#集合及其运算
List_1 = Set ([1,4,5,7,3,6,7,9])
List_2 = Set ([2,6,0,66,22,8,4])
Print (list_1, list_2)
#交集
Print (List_1.intersection (list_2))
Print (List_1 & list_2)
#并集
Print (List_1.union (list_2))
Print (list_1 | list_2)
#差集
Print (List_1.difference (list_2))
Print (list_1-list_2)
#对称差集
Print (List_1.symmetric_difference (list_2))
Print (list_1 ^ list_2)
#子集
List_3 = Set ([1,3,7])
Print (List_3.issubset (list_1))
Print (List_1.issuperset (list_3))

#没有交集
List_4 = set ([100])
Print (List_1.isdisjoint (list_4))

#基本操作
#添加元素
List_1.add (#添加一项)
List_1.update ([20,30,40])
Print (list_1)
#删除元素
Print (list_1)
List_1.remove (3) #若元素不包含在集合中, will error
List_1.discard (5) #若元素不包含在集合中, no error.
List_1.pop ()
Print (list_1)
#测试是否为成员
Print (in list_1)

Python: Collections and their operations