刚刚在超市排队结账，有个黑人哥哥欲言又止地看着我，于是我和他眼神对视了，
然后他说：can you speak English？
我心想虽然好久没学英语但是这句我听懂了，就答个yes吧，
然后他就说了一串#¥/“=～…%¥）”：、…-？？
我以为他讲的阿拉伯语我❓❓
然后旁边的黑人姐姐拿着一个usb嘴里说：input output
我❓然后我说：do you need the computer？？
我心想超市的收银机能插usb不
然后他们还在用身体语言配合英文单词向我说明，然后我听懂了终于，
原来是要打印啊！！！
作为祖国的大学生一定要发挥乐于助人的精神！！
然后我带着这个姐姐去打印店了，路上反应过来我拿着的维他奶没有付钱，
这姐姐路上一直说nearby？？我yes yes yes
然后她好像不满意我的回应
问了我一句“can you speak Chinese？”

GERDA的同事告诉我可以用luigi来做pipeline，所以研究了一下发现很好用！luigi是spotify公司用来处理spark jobs的流程管理软件。你也可以用crontab和bash来管理，但是luigi的好处是如果job fail了luigi可以magically save your time when recovering it。核心逻辑就在于，一个job是否完成只看它的output是否存在。存在就是Done，否则就进scheduler。一个几十个环节的job，重来一次，已经有output的会被自动跳过，不要太happy！这时你要问了，要是output虽然有了，但是是错的了咋办？答案是手动把他们删了.. 虽然如此，luigi还是很好用。你用用就知道了。不过还是得动点脑子的：记得同类task不同的instance要用不同的output name（废话？） https://t.cn/Rqz8xcV

Chart Masters 更新#TaylorSwift[超话]# 全球专辑实销！新专辑Lover发行3周全球狂卖138万！！！[憧憬][憧憬][心][心] ​​​
The five first studio albums, plus one Christmas EP, released by Taylor Swift total an impressive 41,7 million units.

More than anything, each of her studio outputs up to 1989 top the 6 million mark, an unreal achievement considering how proportionally poorly she has been selling in Europe.

With over 70% of her sales coming from the US, these figures can be regarded both ways, extraordinary or not so good, whether you are looking to North American results or abroad sales.

The latter improved with the success of 1989 which sold more than 4 million units outside of the US without accounting for Chinese downloads.

The last two albums Reputation and Lover came out when streaming was already inevitable. Naturally, they sold less than their predecessors although their numbers are still very high by today’s standards.