如何通过python 3.6.5中的变量创建子元素

本文介绍了如何通过python 3.6.5中的变量创建子元素的处理方法，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小编来一起学习吧！ 问题描述

我的代码是:

import xml.etree.ElementTree as ET from lxml import etree var1 = '<name>This is my text</name>' page = etree.Element('first') doc = etree.ElementTree(page) second = etree.SubElement(page, 'second') second.text = var1 doc.write('a.xml', xml_declaration=True, encoding='utf-8')

我的输出是:

<?xml version='1.0' encoding='UTF-8'?> <first><second>&lt;name&gt;This is my text&lt;/name&gt;</second></first>

我想要的输出是:

<?xml version='1.0' encoding='UTF-8'?> <first><second><name>This is my text</name></second></first>

实际上，我想通过变量创建子元素，但我不知道我们的变量中有多少个可用元素.这仅出于测试目的，因此请注意这一点.

Actually, I want to create sub-element through variable and I don't know how many elements are available in our variable. this is only for test purpose so please take care of this.

推荐答案

无法通过将子元素作为XML标记字符串提供来创建子元素.就像<second>一样，必须使用SubElement创建<name>元素.

It is not possible to create a subelement by supplying it as a string of XML markup. The <name> element has to be created using SubElement, just like <second>.

以下代码产生所需的输出:

The following code produces the desired output:

from lxml import etree page = etree.Element('first') second = etree.SubElement(page, 'second') name = etree.SubElement(second, 'name') name.text = "This is my text" doc = etree.ElementTree(page) doc.write('a.xml', xml_declaration=True, encoding='utf-8')

另一种方法是将<name>This is my text</name>字符串解析为Element对象，并将其附加到父对象:

An alternative is to parse the <name>This is my text</name> string into an Element object and append it to the parent:

from lxml import etree var1 = '<name>This is my text</name>' name = etree.fromstring(var1) page = etree.Element('first') second = etree.SubElement(page, 'second') second.append(name) doc = etree.ElementTree(page) doc.write('b.xml', xml_declaration=True, encoding='utf-8')