1、会删除重复的值
2、会打乱集合内的值
wenyi_girlfriend_set = {'fanping', 'zhuping', 'qiangge', 'changyi', 'muzhiguniang1', 'muzhiguniang1','nick'}
zhuping_jiyou_set = {'fanping', 'wenynyi', 'qiange', 'wuzhiguniang'}
print(wenyi_girlfriend_set)
{'fanping', 'nick', 'muzhiguniang1', 'changyi', 'qiangge', 'zhuping'}
wenyi_freind_list = ['ruhua','suiyue','suiyue']
print(set(wenyi_freind_list))
# def set(wenyi_freind_list):
# s = set()
# for i in wenyi_freind_list:
# s.add(i)
# print(s)
{'suiyue', 'ruhua'}
print(len(wenyi_girlfriend_set))
6
print('fanping'in wenyi_girlfriend_set)
True
print(wenyi_girlfriend_set.union(zhuping_jiyou_set))
print(wenyi_girlfriend_set | (zhuping_jiyou_set))
{'fanping', 'nick', 'wuzhiguniang', 'muzhiguniang1', 'wenynyi', 'changyi', 'qiange', 'qiangge', 'zhuping'}
{'fanping', 'nick', 'wuzhiguniang', 'muzhiguniang1', 'wenynyi', 'changyi', 'qiange', 'qiangge', 'zhuping'}
print(wenyi_girlfriend_set.intersection(zhuping_jiyou_set))
print(wenyi_girlfriend_set & (zhuping_jiyou_set))
{'fanping'}
{'fanping'}
print(wenyi_girlfriend_set.difference(zhuping_jiyou_set))
print(wenyi_girlfriend_set - (zhuping_jiyou_set))
{'nick', 'muzhiguniang1', 'changyi', 'qiangge', 'zhuping'}
{'nick', 'muzhiguniang1', 'changyi', 'qiangge', 'zhuping'}
print(wenyi_girlfriend_set.symmetric_difference(zhuping_jiyou_set))
print(wenyi_girlfriend_set ^ (zhuping_jiyou_set))
{'zhuping', 'nick', 'wenynyi', 'muzhiguniang1', 'changyi', 'qiange', 'qiangge', 'wuzhiguniang'}
{'zhuping', 'nick', 'wenynyi', 'muzhiguniang1', 'changyi', 'qiange', 'qiangge', 'wuzhiguniang'}
print(wenyi_girlfriend_set == zhuping_jiyou_set)
False
print(wenyi_girlfriend_set > zhuping_jiyou_set)
print(wenyi_girlfriend_set.issuperset(zhuping_jiyou_set))
False
False
print(wenyi_girlfriend_set < zhuping_jiyou_set)
print(wenyi_girlfriend_set.issubset(zhuping_jiyou_set))
False
False
s={1,2,'a'}
s.add(3)
print(s)
{3, 1, 2, 'a'}
s.remove(2)
print(s)
{3, 1, 'a'}
s1 = {1,2,3,'a'}
s2 = {1,2,'a'}
print(s1.difference_update(s2))
print(s1)
None
{3}
print(s1.isdisjoint(s2))
True