pythonxpath判断元素是否存在_Python Lxml(objectify)：检查标签是否存在

编辑：样本文件的更新答案。

我假设你想搜索每个资产的某些标签。如果是这样，以下内容对我有用：

import lxml.objectify

# Parse the file.

tree = lxml.objectify.parse('sample.xml')

root = tree.getroot()

# Which elements to find.

to_find = set(['presence/faction', 'presence/value', 'fake'])

# Go through each asset in the document.

for asset in root.findall('asset'):

# Check for each element.

for name in to_find:

node = asset.find(name)

if node is not None:

print 'Found %s, its value is %s' % (name, node)

else:

print 'Unable to find %s' % name输出是：

Found presence/value, its value is -1000.0

Found presence/faction, its value is Dvaered

Unable to find fake

Found presence/value, its value is 100.0

Found presence/faction, its value is Empire

Unable to find fake