ElementTree find()/ findall()找不到带命名空间的标签？

Question

如果我指定命名空间,使用以下代码我希望能够搜索目标标记.

import xml.etree.ElementTree as ET

xml = """<?xml version="1.0" encoding="UTF-8"?>
         <xyz2:outer xmlns:xyz1="http://www.company.com/url/common/v1"
                     xmlns:xyz2="http://www.company.com/app/v2"
                     version="9.0"
                     something="false">
             <xyz2:inner>
                 <xyz2:target>
                     <xyz1:idType>name</xyz1:idType>
                     <xyz1:id>A Name Here</xyz1:id>
                 </xyz2:target>
             </xyz2:inner>
         </xyz2:outer>"""

tree = ET.fromstring(xml)

print tree[0][0]
# <Element '{http://www.company.com/app/v2}target' at 0x7f3c294374d0>

tree.find('{http://www.company.com/app/v2}target')
# None

无论我做什么,我都无法找到目标标签？

我已经尝试了各种ElementTree实现,包括lxml,其中涉及{*}名称空间.没有骰子？

Answer 1

target不是根元素; 你应该在前面.//.

>>> import xml.etree.ElementTree as ET
>>> tree = ET.fromstring(xml)
>>> tree.findall('.//{http://www.company.com/app/v2}target')
[<Element '{http://www.company.com/app/v2}target' at 0x2d143c8>]