[python][已解决]如何恢复链接的绝对路径？

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我提取出网页http://www.opensolaris.org/os/community/on/fla ... ll/的一段代码如下

代码： 全选

<tr class="build"><th colspan="0">Build 110</th></tr> <tr class="arccase project flagday"><td>Feb-25</td><td></td><td></td><td></td><td><a href="../pages/2009022501/">Flag Day and Heads Up: Power Aware Dispatcher and Deep C-States</a><br />cpupm keyword mode extensions - <a href="/os/community/arc/caselog/2008/777/">PSARC/2008/777</a><br /> CPU Deep Idle Keyword - <a href="/os/community/arc/caselog/2008/663/">PSARC/2008/663</a><br /></td></tr>

里面的链接都是相对路径 而我想把它们换成绝对路径：

代码： 全选

<tr class="build"><th colspan="0">Build 110</th></tr> <tr class="arccase project flagday"><td>Feb-25</td><td></td><td></td><td></td><td><a href="http://www.opensolaris.org/os/community/on/flag-days/all//pages/2009022501/">Flag Day and Heads Up: Power Aware Dispatcher and Deep C-States</a><br />cpupm keyword mode extensions - <a href="http://www.opensolaris.org/os/community/arc/caselog/2008/777/">PSARC/2008/777</a><br /> CPU Deep Idle Keyword - <a href="http://www.opensolaris.org/os/community/arc/caselog/2008/663/">PSARC/2008/663</a><br /></td></tr>

html 不是正则的语言 所以正则表达式不是最好的解决方案 还是用html解析会好一些
推荐Beautiful Soup 几行代码就搞定了 哈哈～

代码： 全选

    base_url = "http://www.opensolaris.org/os/community/on/flag-days/"
    soup = BeautifulSoup(html_text)
    link_set = soup.findAll('a')
    links = [ e['href'] for e in link_set ]
    #get html_text
    for e in links:
        html_text = string.replace(html_text,e, urljoin(base_url,e),1)