set的回顾
set集合具有唯一性，无序性，所以没有索引indexfrozenset（）用来限制集合的修改
set1 = frozenset()
set2 = {1, 3, 2, 5}
print(set1 == set2)
# 下面则不可创建集合
try:
set3 = {}
except Exception as e:
print(e)
try:
set1.add(4)# set1不可变更
except Exception as e1:
print(e1)
set2.add(8)
set2.remove(3)
print(set2)
set4 = {1, 1.0}
print(set4)
页:
[1]