集合的相关函数

set1 = {"周星驰","周杰伦","周润发","王文"}
set2 = {"王健林","王思聪","王宝强","王文"}

# intersection() 交集
res = set1.intersection(set2)
print(res)
res = set1 & set2
print(res)

# difference() 差集
res = set1.difference(set2)
print(res)
res = set2.difference(set1)
print(res)
res = set1 - set2
print(res)

# union() 并集
res = set1.union(set2)
print(res)
res = set1 | set2
print(res)

# symetic_difference() 对称差集
res = set1.symmetric_difference(set2)
print(res)
res = set1 ^ set2
print(res)

# issubset() 是否是子集 ，完全包含其中的情况
set_father = {"周星驰","周杰伦","周润发","王文"}
set_son = {"周杰伦","周润发"}
res = set_son.issubset(set_father)
print(res)
res = set_son < set_father
print(res)

# issuperset() 判断是父集
set_father = {"周星驰","周杰伦","周润发","王文"}
set_son = {"周杰伦","周润发"}
res = set_father.issuperset(set_son)
print(res)
res = set_father > set_son
print(res)

set_father = {"周星驰","周杰伦","周润发","王文"}
set_son = {"周星驰","周杰伦","周润发","王文"}
res = set_father >= set_son
print(res)
res = set_father <= set_son
print(res)

# isdisjoint() 是否不相交  不相交 True  相交False
set_father = {"周星驰","周杰伦","周润发","王文"}
set_son = {"周星驰","周杰伦"}
res = set_father.isdisjoint(set_son)
print(res)

# add()  增
setvar = {"刘浩杰","徐信信","何伟福","林志远"}
setvar.add("湖滨")
print(setvar)

# update() 迭代着追加
setvar = {"刘浩杰","徐信信","何伟福","林志远"}
lst = ["胡家豪","胡启超"]
setvar.update(lst)
print(setvar)

setvar = {"刘浩杰","徐信信","何伟福","林志远"}
strvar = "abcd"
setvar.update(strvar)
print(setvar)

# clear()  清空
setvar = {"刘浩杰","徐信信","何伟福","林志远"}
setvar.clear()
print(setvar)

# pop()  随机删除集合一个数据
setvar = {"刘浩杰","徐信信","何伟福","林志远"}
res = setvar.pop()
print(res)
print(setvar)


# remove()  删除集合中指定值 ，不存在报错
setvar = {"刘浩杰","徐信信","何伟福","林志远"}
setvar.remove("徐信信")
print(setvar)

# discard()   如果值不存在不删除，也不报错
setvar = {"刘浩杰","徐信信","何伟福","林志远"}
setvar.discard("何伟福123123334")
print(setvar)


# ###冰冻集合
fz = frozenset()
print(fz,type(fz))

fz1 = frozenset([1,"2",3,4])
fz2 = frozenset("7892")
print(fz1,fz2)

# 冰冻集合只能做交叉并补
res = fz1 & fz2
print(res)

# fz1.add(4)  报错 无增加删除操作