python爬虫问题，处理html网页的数据

白玉

对python爬虫不是很懂，现有html网页文件

[HTML] 纯文本查看 复制代码

<li><a href="/kegg-bin/show_pathway?14245484684/hsa01100.args" target="_blank">hsa01100</a> 
Met**lic pathways - Homo sapiens  (<a href="javascript:display('hsa0118')">58</a>)
<li>

请问如何提取"/kegg-bin/show_pathway?14245484684/hsa01100.args"，"hsa0118"，"Met**lic pathways - Homo sapiens "，"58"这四个呢？谢谢

kat

[Python] 纯文本查看 复制代码

import re

val = """
<li><a href="/kegg-bin/show_pathway?14245484684/hsa01100.args" target="_blank">hsa01100</a> 
Met**lic pathways - Homo sapiens  (<a href="javascript:display('hsa0118')">58</a>)
<li>
"""

ret = re.findall("href=\"(.*?)\" target.*?</a>([\s\S]*?)\(<a.*?display\('(.*?)'\)\">(\d+)<", val)
print(ret)

# [('/kegg-bin/show_pathway?14245484684/hsa01100.args', ' \nMet**lic pathways - Homo sapiens  ', 'hsa0118', '58')]

ecithy

lxml模块的xpath语法专门解析html网页