python - 为什么 BeautifulSoup 会修改我的自关闭元素？

Question

这是我的脚本:

import BeautifulSoup

if __name__ == "__main__":
    data = """
    <root>
        <obj id="3"/>
        <obj id="5"/>
        <obj id="3"/>
    </root>
    """
    soup = BeautifulSoup.BeautifulStoneSoup(data)
    print soup

运行时，打印:

<root>
  <obj id="3"></obj>
  <obj id="5"></obj>
  <obj id="3"></obj>
</root>

我希望它保持相同的结构。我该怎么做？

Answer 1

来自Beautiful Soup documentation :

The most common shortcoming of BeautifulStoneSoup is that it doesn't know about self-closing tags. HTML has a fixed set of self-closing tags, but with XML it depends on what the DTD says. You can tell BeautifulStoneSoup that certain tags are self-closing by passing in their names as the selfClosingTags argument to the constructor