#Python tip# 你可能不知道的Python技巧：set及其操作
>>> A = {1, 2, 3, 3}
>>> A
set([1, 2, 3])
>>> B = {3, 4, 5, 6, 7}
>>> B
set([3, 4, 5, 6, 7])
>>> A | B
set([1, 2, 3, 4, 5, 6, 7])
>>> A & B
set([3])
>>> A - B
set([1, 2])
>>> B - A
set([4, 5, 6, 7])
>>> A ^ B
set(
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![[作揖]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/e7/2018new_zuoyi_org.png "[作揖]")
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🏻
下周的信息系统
![[干杯]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/40/2018new_ganbei_org.png "[干杯]")
![[摊手]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/62/2018new_tanshou_org.png "[摊手]")
![[二哈]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/22/2018new_erha_org.png "[二哈]")
![[跪了]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/75/2018new_gui_org.png "[跪了]")
![[泪]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/6e/2018new_leimu_org.png "[泪]")
![[允悲]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/83/2018new_kuxiao_org.png "[允悲]")
![[doge]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/a1/2018new_doge02_org.png "[doge]")
学python！ 
![[兔子]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/c6/2018new_tuzi_org.png "[兔子]")
![[羞嗒嗒]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/df/lxhxiudada_org.gif "[羞嗒嗒]")
![[笑cry]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/4a/2018new_xiaoku_org.png "[笑cry]")
大部分人python学不完就放弃了吧
![[微笑]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/e3/2018new_weixioa02_org.png "[微笑]")
![[吃瓜]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/01/2018new_chigua_org.png "[吃瓜]")
![[白眼]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/ef/2018new_landelini_org.png "[白眼]")
1/7的概率能猜中 超开心啦
果然是自己敲的亲儿子![[污]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/10/2018new_wu_org.png "[污]")
![[小黄人高兴]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/41/xhrnew_gaoxing_org.png "[小黄人高兴]")
![[伤心]](http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/6c/2018new_xinsui_org.png "[伤心]")
