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正则表达式 匹配的问题

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悬赏园豆:10 [待解决问题]
 1 import re
 2 #txt='there are  a big apple and a big pear and three big peachs apple'
 3 #reg=r'(big pear|big apple|big peachs)'
 4 txt='<img src="http://www.comicyu.com/Skin/Default/Item/newartick/imager/comicweixin.png" title="\u6f2b\u57df\u7f51\u5b98\u65b9\u5fae\u4fe1" alt="\u6f2b\u57df\u7f51\u5b98\u65b9\u5fae\u4fe1" /><img src="http://www.comicyu.com/Skin/Default/Item/newartick/imager/weixin.jpg">'
 5 reg=r'src="(.+?jpg|.+?png)"'
 6 reg1=r'src="(.+png|.+jpg)"'
 7 a= re.compile(reg)
 8 a1=re.compile(reg1)
 9 lisg=re.findall(a,txt)
10 lisg1=re.findall(a1,txt)
11 print lisg
12 print lisg1

 

结果是不同的:

['http://www.comicyu.com/Skin/Default/Item/newartick/imager/comicweixin.png" title="\\u6f2b\\u57df\\u7f51\\u5b98\\u65b9\\u5fae\\u4fe1" alt="\\u6f2b\\u57df\\u7f51\\u5b98\\u65b9\\u5fae\\u4fe1" /><img src="http://www.comicyu.com/Skin/Default/Item/newartick/imager/weixin.jpg']


['http://www.comicyu.com/Skin/Default/Item/newartick/imager/comicweixin.png', 'http://www.comicyu.com/Skin/Default/Item/newartick/imager/weixin.jpg']

而理想爬虫时,希望最终结果都是第二个显示的样子,那么应该如何做呢

tuge的主页 tuge | 初学一级 | 园豆:168
提问于:2017-05-12 11:13
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