使用带有lxml前缀的fromstring() [英] using fromstring() with lxml prefixes

问题描述

我有一个可变的ele.我试图将一个子节点附加到其标签中包含名称空间前缀(称为样式)的ele上. ele似乎知道此前缀，如下所示:

I have a variable ele. I'm trying to append a child node onto ele that contains a namespace prefix (called style) in its tag. ele seems to be aware of this prefix, as the line:

print(ele.nsmap['style'])

输出

urn:oasis:names:tc:opendocument:xmlns:style:1.0

但是当我尝试运行时

ele.append(etree.fromstring('<style:style />'))

我得到了错误

lxml.etree.XMLSyntaxError: Namespace prefix style on style is not defined

我在这里想念什么?

推荐答案

etree.fromstring('<style:style />')会引发错误，因为<style:style />是不是

etree.fromstring('<style:style />') throws an error because <style:style /> is a small XML document that is not namespace-well-formed.

如果要提供名称空间作为fromstring()的参数，则必须在文档中声明名称空间:

You have to declare the namespace in the document if you want to provide it as an argument to fromstring():

etree.fromstring('<style:style xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" />')

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