集合的方法

#set是可变的数据类型，里面的元素是不可变的,无序，不重复
# set1 = {1, 'str', False, (1, 2, 3), 1, 1}
# print(set1)

#增add
# set1 = {'chuan', 'huang', 'lin', 'li'}
# set1.add('liu')
# print(set1)
#
# #update迭代元素的更新
# set1.update('abc')
# print(set1)


#删
# set1 = {'chuan', 'huang', 'lin', 'li'}
# print(set1.pop())
# print(set1)
#
# set1.remove('huang')        #按元素去删
# print(set1)
#
# set1.clear()                #清空
# del set1                    #删除


#查
# set1 = {'chuan', 'huang', 'lin', 'li'}
# for i in set1:
#     print(i)

#集合的并集
# set1 = {1,2,3,4}
# set2 = {3,4,5,6}
# set3 = set1 & set2
# print(set3)           #{3, 4}
# print(set1.intersection(set2))    #{3, 4}


#集合的交集
# set1 = {1,2,3,4}
# set2 = {3,4,5,6}
# set3 = set1 | set2
# print(set3)           #{1, 2, 3, 4, 5, 6}
# print(set1.union(set2))    #{1, 2, 3, 4, 5, 6}

#反交集
# set1 = {1,2,3,4}
# set2 = {3,4,5,6}
# print(set1 ^ set2)           #{1, 2, 5, 6}
# print(set1.symmetric_difference(set2))       #{1, 2, 5, 6}

#差集，set1和set2去除相同部分而剩下的元素
# set1 = {1,2,3,4}
# set2 = {3,4,5,6}
# print(set1 - set2)     #{1，2}
# print(set1.difference(set2))      #{1，2}

#超集和子集
# set1 = {1,2,3,4}
# set2 = {1,2,3,4,5,6}
# print(set1 < set2)
# print(set1.issubset(set2))
# print(set2 > set1)
# print(set2.issuperset(set1))

#去除相同的元素
# li = [1,55,6,2,3,4,6,6,3]
# set1 = set(li)
# print(set1)
# li = list(set1)
# print(li)


#转换为不可变数据类型
# set2 = frozenset('abcd')
# print(set2, type(set2))