推荐学习书目
› Learn Python the Hard Way
Python Sites
› PyPI - Python Package Index
› http://diveintopython.org/toc/index.html
› Pocoo
值得关注的项目
› PyPy
› Celery
› Jinja2
› Read the Docs
› gevent
› pyenv
› virtualenv
› Stackless Python
› Beautiful Soup
› 结巴中文分词
› Green Unicorn
› Sentry
› Shovel
› Pyflakes
› pytest
Python 编程
› pep8 Checker
Styles
› PEP 8
› Google Python Style Guide
› Code Style from The Hitchhiker's Guide
这是一个创建于 4104 天前的主题，其中的信息可能已经有所发展或是发生改变。
比如有这么一段，想要删除","，这应该怎么来处理？
[{"title": [["", " ", " Funny CAT = Funny cats in water, EPIC", " ", " ", " ", " Very Funny Cats!!", " ", " ", " ", " Cute Funny Cats Fail Compilation - 2013", " ", " ", " ", " 100 Funny Cats 2", " ", " ", " ", " Cats are terribly afraid of the water", " ", " ", " ", " NEW very funny cats!The Best!", " ", " ", " ", " The Best of funny and sweet Cats 2012 NEW", " ", " ", " ", " Funny Cats part 2 (WAR CATS!!)", " ", " ", " ", " Funny cats XD", " ", " ", " ", " Funny Cats Compilation (Hilarious)", " ", " ", " ", " 20 Minutes of Funny Cats!!!!", " ", " ", " ", " Funny Cats Compilation 2013 - Funny Cats Compilation", " ", " ", " ", " Funny Cats In Funny Cats Video When Toast Attacks", " ", " ", " ", " FUNNY ANIMALS VIDEO - FUNNY CATS STONED..", " ", " ", " ", " Funny Dogs & Cats Unusual - Ugly? Beauty is in the eye of the beholder.", " ", " ", " ", " Funny Cats Video Compilations-", " ", " ", " ", " Funny Cats. Little fail of Kitten", " ", " ", " ", " Funny CAT = Kitten miscalculates jump funny video cats", " ", " ", " ", " Funny Cats - Two kittens Playing with a Ball", " ", " ", " ", " Funny Cats Episode 1", " ", " "]]},
[{"title": [["", " ", " Funny CAT = Funny cats in water, EPIC", " ", " ", " ", " Very Funny Cats!!", " ", " ", " ", " Cute Funny Cats Fail Compilation - 2013", " ", " ", " ", " 100 Funny Cats 2", " ", " ", " ", " Cats are terribly afraid of the water", " ", " ", " ", " NEW very funny cats!The Best!", " ", " ", " ", " The Best of funny and sweet Cats 2012 NEW", " ", " ", " ", " Funny Cats part 2 (WAR CATS!!)", " ", " ", " ", " Funny cats XD", " ", " ", " ", " Funny Cats Compilation (Hilarious)", " ", " ", " ", " 20 Minutes of Funny Cats!!!!", " ", " ", " ", " Funny Cats Compilation 2013 - Funny Cats Compilation", " ", " ", " ", " Funny Cats In Funny Cats Video When Toast Attacks", " ", " ", " ", " FUNNY ANIMALS VIDEO - FUNNY CATS STONED..", " ", " ", " ", " Funny Dogs & Cats Unusual - Ugly? Beauty is in the eye of the beholder.", " ", " ", " ", " Funny Cats Video Compilations-", " ", " ", " ", " Funny Cats. Little fail of Kitten", " ", " ", " ", " Funny CAT = Kitten miscalculates jump funny video cats", " ", " ", " ", " Funny Cats - Two kittens Playing with a Ball", " ", " ", " ", " Funny Cats Episode 1", " ", " "]]},
第 1 条附言 · 2013-08-31 09:06:45 +08:00
我是用
video['title'] = [''.join(app.select('./li/div/h3//text()').extract_unquoted()).split('\n')]
在抓取网页头的时候得到这组数据的，如果不用split('\n')则会有很多个无用的\n,但是我又要保证每两个\n之间的字符串与其他的字符串分开，因为生成的是json，我需要与另一条命令
video['link'] = app.select('./li/div/h3/a/@src').extract
生成的json串对应起来
video['title'] = [''.join(app.select('./li/div/h3//text()').extract_unquoted()).split('\n')]
在抓取网页头的时候得到这组数据的，如果不用split('\n')则会有很多个无用的\n,但是我又要保证每两个\n之间的字符串与其他的字符串分开，因为生成的是json，我需要与另一条命令
video['link'] = app.select('./li/div/h3/a/@src').extract
生成的json串对应起来
 |
1
avichen 2013-08-31 06:22:42 +08:00
list.remove(",")
当然先要判断一下是否存在",",然后再remove。 |
 |
2
ahxxm 2013-08-31 06:22:53 +08:00 via Android
[item for item in list if item != ","]
|
 |
3
9hills 2013-08-31 06:31:32 +08:00
你们都没理解lz想要做什么，不是说list的内容里有',' ， 而是lz想把list 打印出来，不含','。。
Python list拼接推荐用join，很好理解 String.join(list)，就是将list的各个元素以字符串String（可以为空）拼接起来 lz的例子显然是这样的 ''.join(['sdfdsf','sdfsdf',' ', 'sdfdsf']) |
 |
4
brucebot OP |
 |
5
detailyang 2013-08-31 09:00:33 +08:00
生成json最好用extract[0],不然json.loads会无法解析....同时记得判断数据是否存在,
|
Select Language