带有 lxml 构建器的 SSS 版本

问题描述

我正在使用 lxml builder Element，我想知道如何更改 sss 版本？

我的代码如下用于创建 .xml：

import lxml.etree
import lxml.builder

new_xml = lxml.builder.ElementMaker()
sss = new_xml.sss
date = new_xml.date
user = new_xml.user
survey = new_xml.survey
record = new_xml.record
variable = new_xml.variable
name = new_xml.name
label = new_xml.label

today_date=date.today().strftime('%Y-%m-%d') #today's date
uniq_list = ['a','b','c']
labels = ['a','c']
nvars = len(uniq_list)

for i in range(nvars):
    final_xml = (sss(
            date(today_date),user(username),survey(record(
                    *[variable(
                            name(uniq_list[i]),label(labels[i]),ident = str(i+1))
                     for i in range(nvars)],ident = 'A'))))
        
newxml = lxml.etree.tostring(final_xml,xml_declaration=True,encoding='utf-8',pretty_print=True)
with open(path+r"/"+stage+'_'+str(today_date)+'.xml','w') as myfile:
    myfile.write(newxml)

这段代码给了我以下内容：

<?xml version='1.0' encoding='utf-8'?>
<sss>
  <date>2021-03-03</date>
  <user>username</user>
  <survey>
    <record ident="A">

但我们现在有了 sss version='1.2'，甚至 2.0。可以设置版本吗？

解决方法

您可以使用字典添加属性。这是一个简化的例子：

import lxml.etree
import lxml.builder
 
new_xml = lxml.builder.ElementMaker()
sss = new_xml.sss
date = new_xml.date
user = new_xml.user
 
final_xml = sss({"version": "2.0"},date("2021-03-03"),user("John Doe")
            )

lxml.etree.dump(final_xml,pretty_print=True)

输出：

<sss version="2.0">
  <date>2021-03-03</date>
  <user>John Doe</user>
</sss>