本文介绍了如何让 BeautifulSoup 4 尊重自闭标签?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着跟版网的小编来一起学习吧！
问题描述
这个问题是针对 BeautifulSoup4 的问题，这使得它不同于以前的问题:
This question is specific to BeautifulSoup4, which makes it different from the previous questions:
BeautifulSoup 为什么要修改我的自闭合元素?
BeautifulSoup 中的 selfClosingTags
由于 BeautifulStoneSoup 已经消失(之前的 xml 解析器)，我怎样才能让 bs4 尊重一个新的自闭合标签?例如:
Since BeautifulStoneSoup is gone (the previous xml parser), how can I get bs4 to respect a new self-closing tag? For example:
import bs4
S = '''<foo> <bar a="3"/> </foo>'''
soup = bs4.BeautifulSoup(S, selfClosingTags=['bar'])
print soup.prettify()
不会自动关闭 bar 标签，但会给出提示.bs4 所指的这个树生成器是什么以及如何自我关闭标签?
Does not self-close the bar tag, but gives a hint. What is this tree builder that bs4 is referring to and how to I self-close the tag?
/usr/local/lib/python2.7/dist-packages/bs4/__init__.py:112: UserWarning: BS4 does not respect the selfClosingTags argument to the BeautifulSoup constructor. The tree builder is responsible for understanding self-closing tags.
"BS4 does not respect the selfClosingTags argument to the "
<html>
<body>
<foo>
<bar a="3">
</bar>
</foo>
</body>
</html>
推荐答案
解析你传入的XMLxml"作为 BeautifulSoup 构造函数的第二个参数.
soup = bs4.BeautifulSoup(S, 'xml')
您需要安装 lxml.
您不再需要传递 selfClosingTags:
In [1]: import bs4
In [2]: S = '''<foo> <bar a="3"/> </foo>'''
In [3]: soup = bs4.BeautifulSoup(S, 'xml')
In [4]: print soup.prettify()
<?xml version="1.0" encoding="utf-8"?>
<foo>
<bar a="3"/>
</foo>
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