AttributeError插入Python中的lxml树中 [英] AttributeError inserting into lxml Tree in Python
问题描述
我正在尝试将一小段xml结构注入到已经存在的xml文件中的特定位置:
I'm trying to inject a small structure of xml into a specific location in an already existing xml file:
<not>
<elt>
<isVal>Y</isVal>
</elt>
</not>
我的代码如下:
import lxml.etree as ElementTree;
tree = ElementTree.ElementTree()
tree.parse(file_path)
root = tree.getroot();
ruleElement = tree.find('.//rule');
for child_n in ruleElement:
if (child_n.tag == 'and'):
print "Found rule - and"
ruleElement.insert(0, tree.XML("<not><elt><isVal>Y</isVal></elt></not>"))
我收到以下错误: AttributeError:"lxml.etree._ElementTree"对象没有属性"XML"
我也尝试过:
for child_n in ruleElement:
if (child_n.tag == 'and'):
print "Found rule - and"
child_n.Element(child_n, 'test_insert').text = 'test'
child_n.insert(1, item[0])
这给出了: AttributeError:"lxml.etree._ElementTree"对象没有属性"Element"
尝试将其作为SubElement，得到相同的错误消息: AttributeError:'lxml.etree._Element'对象没有属性'SubElement'
Tried it as SubElement, got the same error message: AttributeError: 'lxml.etree._Element' object has no attribute 'SubElement'
我从其他类似的问题中得到了有关如何执行此操作的想法，但似乎只是不想接受Element，SubElement或XML作为可接受的属性.我在做什么错了?
I got the ideas on how to do it from other similar questions but it just doesn't seem to want to accept Element, SubElement or XML as acceptable attributes. What am I doing wrong?
我正在使用Python 2.6，无法升级.
I'm using Python 2.6, upgrading isn't an option.
推荐答案
您需要使用 lxml.etree.SubElement 创建
You need to create 'elements' using lxml.etree.SubElement:
import lxml.etree
xml = lxml.etree.parse('xyz.xml')
root = xml.getroot()
nt = lxml.etree.SubElement(root, 'not') # add to the XML root!
elt = lxml.etree.SubElement(nt, 'elt')
isVal = lxml.etree.SubElement(elt, 'isVal')
isVal.text = 'Y'
with open("xyz2.xml", 'wb') as f:
f.write(lxml.etree.tostring(root, xml_declaration=True, encoding="utf-8"))
print(open("xyz2.xml", 'r').read())
输出:
<?xml version='1.0' encoding='utf-8'?>
<note>
<to>abc</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Party</body>
<not><elt><isVal>Y</isVal></elt></not></note>
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