我有以下 XML 文件：
<?xml version="1.0" encoding="UTF-8"?>
<xliff version="1.2" xmlns="urn:oasis:names:tc:xliff:document:1.2" xmlns:okp="okapi-framework:xliff-extensions" xmlns:its="http://www.w3.org/2005/11/its" xmlns:itsxlf="http://www.w3.org/ns/its-xliff/" its:version="2.0">
<file original="temp/file_conversion/tmp4a9kn6bn/69502fea-751c-4c3c-a38a-4fce9e13ebde.txt" source-language="en" target-language="ar" datatype="x-text/plain" okp:inputEncoding="UTF-8">
<body>
<trans-unit id="1idhasofh" xml:space="preserve">
<source xml:lang="en">foo<bpt id="0"><bar></bpt><Instruction><ept id="0"><crow></ept><grande></source>
<target xml:lang="ar">foo<bpt id="0"><bar></bpt><Instruction><ept id="0"><crow></ept><grande></target>
</trans-unit>
</body>
</file>
</xliff>
我正在尝试创建一个函数来解析我已读入 ElementTree.Element 的 XML 文件：
from xml.etree import ElementTree as ET
def parse_xml(ele: ET.Element):
tag = ele.tag
if not isinstance(tag, str) and tag is not None:
return
t = ele.text
if t:
yield t
for e in ele:
parse_xml(e)
t = e.tail
if t:
yield t
def main():
fp = "path/to/xml"
tree = ET.parse(fp)
root = tree.getroot()
t_units = root.findall(".//{*}trans-unit")
for source, target in t_units:
for ele in parse_xml(source):
print(ele)
我得到：
foo
<Instruction>
<grande>
在我的调试器中，我看到
parse_xml(e)def parse_xml(ele: ET.Element):
tag = ele.tag
if not isinstance(tag, str) and tag is not None:
return
t = ele.text
if t:
print(t)
for e in ele:
parse_xml(e)
t = e.tail
if t:
print(t)
我得到了预期的结果（到达所有标记的文本）：
foo
<bar>
<Instruction>
<crow>
<grande>
为什么yield会出现这种情况？
parse_xmlparse_xml for ele in parse_xml(source):此外，
parse_xmlforyield因此，您可以在每个递归 parse_xml 调用中循环返回值，如下所示：
def parse_xml(ele: ET.Element):
...
for e in ele:
for inner_e in parse_xml(e):
yield inner_e
t = e.tail
if t:
yield t
或者，您可以使用 Python 的语法结构
yield fromdef parse_xml(ele: ET.Element):
tag = ele.tag
if not isinstance(tag, str) and tag is not None:
return
t = ele.text
if t:
yield t
for e in ele:
yield from parse_xml(e)
t = e.tail
if t:
yield t
yield fromparse_xmlStopIterationfor