我试图发出带有元素树的XML文件,其中包含XML声明和名称空间。这是我的示例代码:
I am trying to emit an XML file with element-tree that contains an XML declaration and namespaces. Here is my sample code:
from xml.etree import ElementTree as ET ET.register_namespace('com',"wwwpany") #some name # build a tree structure root = ET.Element("STUFF") body = ET.SubElement(root, "MORE_STUFF") body.text = "STUFF EVERYWHERE!" # wrap it in an ElementTree instance, and save as XML tree = ET.ElementTree(root) tree.write("page.xml", xml_declaration=True, method="xml" )但是,两者都不<?xml 标记也不会出现,也不会显示任何名称空间/前缀信息。
However, neither the <?xml tag comes out nor any namespace/prefix information. I'm more than a little confused here.
推荐答案尽管文档否则,我只能得到<?xml> 声明通过同时指定xml_declaration和编码。
Although the docs say otherwise, I only was able to get an <?xml> declaration by specifying both the xml_declaration and the encoding.
您必须在已注册的名称空间中声明节点,才能在文件中的节点上获得名称空间。这是代码的固定版本:
You have to declare nodes in the namespace you've registered to get the namespace on the nodes in the file. Here's a fixed version of your code:
from xml.etree import ElementTree as ET ET.register_namespace('com',"wwwpany") #some name # build a tree structure root = ET.Element("{wwwpany}STUFF") body = ET.SubElement(root, "{wwwpany}MORE_STUFF") body.text = "STUFF EVERYWHERE!" # wrap it in an ElementTree instance, and save as XML tree = ET.ElementTree(root) tree.write("page.xml", xml_declaration=True,encoding='utf-8', method="xml")输出(page.xml)
Output (page.xml)
<?xml version='1.0' encoding='utf-8'?><com:STUFF xmlns:com="wwwpany"><com:MORE_STUFF>STUFF EVERYWHERE!</com:MORE_STUFF></com:STUFF>ElementTree也不漂亮。这是输出精美的输出:
ElementTree doesn't pretty-print either. Here's pretty-printed output:
<?xml version='1.0' encoding='utf-8'?> <com:STUFF xmlns:com="wwwpany"> <com:MORE_STUFF>STUFF EVERYWHERE!</com:MORE_STUFF> </com:STUFF>
您也可以声明默认名称空间,并且不要t需要注册一个:
You can also declare a default namespace and don't need to register one:
from xml.etree import ElementTree as ET # build a tree structure root = ET.Element("{wwwpany}STUFF") body = ET.SubElement(root, "{wwwpany}MORE_STUFF") body.text = "STUFF EVERYWHERE!" # wrap it in an ElementTree instance, and save as XML tree = ET.ElementTree(root) tree.write("page.xml", xml_declaration=True,encoding='utf-8', method="xml",default_namespace='wwwpany')输出(漂亮的打印间距是我的)
Output (pretty-print spacing is mine)
<?xml version='1.0' encoding='utf-8'?> <STUFF xmlns="wwwpany"> <MORE_STUFF>STUFF EVERYWHERE!</MORE_STUFF> </STUFF>更多推荐
在Python中使用ElementTree发出名称空间规范
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