集合

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#Author：Kevin_hou   list_1 = [1,2,3,4,5,6,7,8,8]    #集合也是无序的 list_1 = set(list_1) list_2 = set([2,4,6,8,10,12])   print(list_1,type(list_1)) print(list_1,list_2) #取交集 print( list_1.intersection(list_2))   #并集 print(list_1.union(list_2)) #差集list_1-list_2 print(list_1.difference(list_2)) #list_2-list_1 print(list_2.difference(list_1)) #子集 list_3 =set ([2,4,6]) print(list_1.issubset(list_2)) print(list_3.issubset(list_2)) print(list_1.issubset(list_2))   #对称差集 print(list_1.symmetric_difference(list_2))   print("-----------------------------")   list_4 = set([3,7,9]) print(list_3.isdisjoint(list_4)) print("****************************") #交集 print(list_1&list_2) #并集 print(list_1|list_2) #difference print(list_1-list_2) #对称差集 print(list_1^list_2) #添加1项 list_1.add(888) list_1.update([222,333,444]) print(list_1) #删除（任意删） print(list_1.pop()) print(list_1.pop()) print(list_1.pop())