python怎么用正则怎么获取标题

Question

<h3 class="title h1 js-title"> <a href="/out/7561938" target="426428" data-main-tab="/out/7561938" data-new-tab="view/dji.com?c=7561938"> $300 Off Phantom 3 Standard </a> </h3>

Answer 1

反向思维, 从标签中找到文本很麻烦, 所以我们干脆就把别的标签都干掉

import re
html = u'<h3 class="title h1 js-title"> <a href="/out/7561938" target="426428" data-main-tab="/out/7561938" data-new-tab="view/dji.com?c=7561938"> $300 Off Phantom 3 Standard </a> </h3>'
title = re.sub(ur'<.+?>', '', html).strip()
print title # $300 Off Phantom 3 Standard

Answer 2

import re
html = u'<h3 class="title h1 js-title"> <a href="/out/7561938" target="426428" data-main-tab="/out/7561938" data-new-tab="view/dji.com?c=7561938"> $300 Off Phantom 3 Standard </a> </h3>'
print re.search(r'(?<=\d">\s).+?(?=</a>)',html).group(0)

前提是view/dji.com?c=xx 中的xx总是数字