python 集合实例列举

#集合是无序的list_1 = [1,3,4,5,7,3,6,7,9]list_1 = set(list_1)    #集合去重

list_2 = set([2,6,0,66,22,8,4])#交集print(list_1.intersection(list_2))

#并集print(list_1.union(list_2))#差集:保留1有 2无的print(list_1.difference(list_2))#子集:3是1的子集list_3 = set([1,3,7])print(list_3.issubset(list_1))#父集print(list_1.issuperset(list_3))#对称差集print(list_1.symmetric_difference(list_2))print("-------------------------")#无交集返回true，否则felselist_4 = set([5,6,8,3])print(list_3.isdisjoint(list_4))

#求交集print(list_1 & list_2)#求并集print(list_1 | list_2)#差集1有 2无print(list_1 - list_2)#对称差集print(list_1 ^ list_2)

#增删改查list_1.add(999) #增list_1.update([888,777,555])print(‘list1:‘,list_1)list_1.remove(888) #删，找不到会报错#print(list_1.pop()) #随机删除

print(‘list1:‘,list_1)list_1.discard(777) #删除，找不到不报错print(‘list1:‘,list_1)

#print(list_1,list_2)

原文地址：https://www.cnblogs.com/wzsx/p/8963608.html