Python - 打印漂亮的 XML，为空标签文本创建开始和结束标签 [英] Python - print pretty XML create opening and closing tags for empty tags text

问题描述

我正在编写一个 python 应用程序，它创建一个 ElementTree (XML)，然后使用 minidom 的 toprettyxml() 将其写入文件；

I'm writing a python application that creates an ElementTree (XML) and then writing it to a file, using minidom's toprettyxml();

final_tree = minidom.parseString(ET.tostring(root))
fdout.write(final_tree.toprettyxml(indent = '    ')

问题是，我没有附加任何文本的标签只有一个标签，例如:

The problem is, that tags which i'm not appending any text comes out with only one tag, for example:

<sometag/>

我希望它是:

<sometag>
</sometag>

我想在不解析整个字符串(没有正则表达式)的情况下做到这一点.有人熟悉这种方式吗?谢谢.

I want to do it without parsing the whole string (without regex). Is anybody familiar with such way? Thanks.

推荐答案

minidom.py 中的行为是硬连接的(查看 writexml() 方法在 class Element 中).它并不意味着要更改，但对于当前实现，您可以像这样修补它:

The behavior is hard-wired in minidom.py (have a look at writexml() method in class Element). It is not meant to be changed, but for the current implementation you can monkey-patch it like this:

from xml.dom import minidom

t = minidom.parseString('<a><b></b></a>')

def patcher(method):
  def patching(self, *args, **kwargs):
    old = self.childNodes
    try:
      if not self.childNodes:
        class Dummy(list):
          def __nonzero__(self):  # Python2
            return True
          def __bool__(self):  # Python3
            return True
        old, self.childNodes = self.childNodes, Dummy([])
      return method(self, *args, **kwargs)
    finally:
      self.childNodes = old
  return patching

t.firstChild.__class__.writexml = patcher(t.firstChild.__class__.writexml)

print t.toprettyxml()

但我当然不能推荐这样的黑客.

But of course I cannot recommend such a hack.

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