在 Python 中提取 XML 标记内的文本（同时避免 <p> 标记）

Question

我正在使用 Python 中的 NYT 语料库，并尝试仅提取每个 .xml 文章文件的“full_text”类中的内容。例如：

<body.content>
      <block class="lead_paragraph">
        <p>LEAD: Two police officers responding to a reported robbery at a Brooklyn tavern early yesterday were themselves held up by the robbers, who took their revolvers and herded them into a back room with patrons, the police said.</p>
      </block>
      <block class="full_text">
        <p>LEAD: Two police officers responding to a reported robbery at a Brooklyn tavern early yesterday were themselves held up by the robbers, who took their revolvers and herded them into a back room with patrons, the police said.</p>
      </block>

理想情况下，我只想解析出字符串，产生“LEAD：两名警察回应报告的抢劫案......”但我不确定最好的方法是什么。这是可以通过正则表达式轻松解析的东西吗？如果是这样，我尝试的任何方法似乎都不起作用。

任何建议将不胜感激！

Answer 1

你也可以使用BeautifulSoup解析器。

>>> from bs4 import BeautifulSoup
>>> s = '''<body.content>
      <block class="lead_paragraph">
        <p>LEAD: Two police officers responding to a reported robbery at a Brooklyn tavern early yesterday were themselves held up by the robbers, who took their revolvers and herded them into a back room with patrons, the police said.</p>
      </block>
      <block class="full_text">
        <p>LEAD: Two police officers responding to a reported robbery at a Brooklyn tavern early yesterday were themselves held up by the robbers, who took their revolvers and herded them into a back room with patrons, the police said.</p>
      </block>'''
>>> soup = BeautifulSoup(s)
>>> for i in soup.findAll('block', class_="full_text"):
        print(i.text)



LEAD: Two police officers responding to a reported robbery at a Brooklyn tavern early yesterday were themselves held up by the robbers, who took their revolvers and herded them into a back room with patrons, the police said.

Answer 2

这是不是很容易被正则表达式解析？

Dont'!

使用像lxml这样的xml解析器。

ex = """
<body.content>
      <block class="lead_paragraph">
        <p>LEAD: Two police officers responding to a reported robbery at a Brooklyn tavern early yesterday were themselves held up by the robbers, who took their revolvers and herded them into a back room with patrons, the police said.</p>
      </block>
      <block class="full_text">
        <p>LEAD: Two police officers responding to a reported robbery at a Brooklyn tavern early yesterday were themselves held up by the robbers, who took their revolvers and herded them into a back room with patrons, the police said.</p>
      </block>
</body.content>"""

from lxml import etree
ex = etree.fromstring(ex)
print ex.findtext('./block/p')

输出：

LEAD: Two police officers responding to a reported robbery at a 
Brooklyn tavern early yesterday were themselves held up by the robbers, who
took their revolvers and herded them into a back room with patrons, the 
police said.