如何输出XML实体引用 [英] How to output XML entity references

问题描述

我正在使用Python xml.etree.ElementTree输出XML。我想输出带有在解析XML时将被替换的实体引用。

I am using Python xml.etree.ElementTree to output XML. I want to output it with entity references that will be substituted when the XML is parsed.

通常'&'被转义为& amp ; ，因为'&'用于声明实体引用。但是，我确实要做要编写一个实体引用。例如，我要编写一个包含实体引用& manifestName; 的XML文件：

ordinarily '&' is escaped as & because '&' is used to declare entity references. However, I really do want to write an entity reference. For example, I want to write an XML file containing the entity reference &manifestName;:

>>> from xml.etree.ElementTree import Element, tostring
>>> manifest = Element('manifest')
>>> manifest.text = '&manifestName;'
>>> tostring(manifest)

返回一个逃逸的&符：

'<manifest>&amp;manifestName;</manifest>'

所需的XML将是：

'<manifest>&manifestName;</manifest>'

我尝试了各种转义技巧，例如&＃ 38; ， \& ，&& ，但它们没有工作。它们包含的与符号始终呈现为& 。

I have tried various escaping tricks, like &, \&, &&, but they do not work. The ampersands they contain are always rendered as &.

推荐答案

我决定采用相对可口的破解方法。在文本中，我使用& 表示逃脱的& 。 ElementTree将此转换为&& 。最后，我只是对其进行字符串替换：

I have decided to go with a relatively palatable hack. In the text, I use && to mean an escaped &. ElementTree converts this to &&. At the end, I simply do a string replacement on it:

>>> from xml.etree.ElementTree import Element, tostring
>>> manifest = Element('manifest')
>>> manifest.text = '&&manifestName;'
>>> tostring(manifest).replace('&&', '&')

结果是我想要的实体引用：

The result is the entity reference I want:

'<manifest>&manifestName;</manifest>'

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