[英]Ideal xml parser for python
我一直在嘗試使用lxml讀取xml文件並替換類別標簽和子類別標簽之間的值。
我想將新的xml重定向到一個新文件。
data = """<xml>
<questionset author="Joee Foo"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.escreeningz.com"
xsi:schemaLocation="http://www.escreeningz.com ../xsd/QuestionSet.xsd">
<question status="A" identifier="SampleQuestions.xml_1">
<classification>
<type>CONCEPTUAL</type>
<category>Core Java</category>
<subcategory>Exception Handling</subcategory>
<difficulty>2</difficulty>
</classification>
<tags>
<tag>Exception Hierarchy</tag>
<tag>Checked and Unchecked exceptions</tag>
<tag>Finally Block</tag>
</tags>
<preface>
<section order="1" type="STANDARD">
<value><![CDATA[Which of the statements regarding exceptions in Java are true?]]></value>
</section>
</preface>
<answers>
<answer correct="false" score="-4">
<value><![CDATA[Checked exceptions extend java.lang.RuntimeException.
]]></value>
<explain>It is uncheked exception that extend java.lang.Runtime;not checked</explain>
</answer>
<answer correct="true" score="5">
<value><![CDATA[The base class for all Exceptions and Errors is java.lang.Throwable.
]]></value>
</answer>
<answer correct="true" score="5">
<value><![CDATA[Any method that might throw a checked exception like java.io.IOException must either declare
the exception using the throws keyword or handle the exception with an appropriate try/catch.
]]></value>
</answer>
<answer correct="true" score="2">
<value><![CDATA[If you use a finally block, it will always be invoked regardless of whether an exception in the corresponding try is thrown or not
and regardless of whether a thrown exception is caught or not as long as the JVM is running.
]]></value>
</answer>
<answer correct="false" score="-4">
<value><![CDATA[All catch blocks must be ordered as general caught first to specific caught last]]></value>
<explain>All catch blocks must be ordered from specific to general</explain>
</answer>
</answers>
</question>
</questionset>
</xml>
"""
# csv to xml conversion
import sys
import os
import csv
import xml.etree.ElementTree as ET
from lxml import etree
from StringIO import StringIO
from lxml.etree import Element
stream = StringIO(data)
context = etree.iterparse(stream, events=("start", ))
現在,當我嘗試從和標記之間提取值時,它將返回一個空列表。 :(
for action,elem in context:
for child in elem.findall('{http://www.escreeningz.com}category'):
print child.attrib
Result is : {}
當我運行以下代碼時,它會正確返回標記:
for action,elem in context:
for child in elem.findall('{http://www.escreeningz.com}category'):
print child.tag
Result: {http://www.escreeningz.com}category
我在這里想念什么嗎?
我終於要更換
<category>Core Java</category>
與
<category>SQL</category>
這個stackoverflow問題對xml解析有足夠的討論
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