BeautifulSoup4无法正确解析xml
[英]BeautifulSoup4 not parsing xml correctly
问题描述
我试图在Python中使用BeautifulSoup4编写一个xml解析器。 由于某种原因，文档未正确解析。 我的xml文档如下所示：
<module id="BrainParser_1" name="Brain Parser" package="CCB" version="1" location="pipeline://cranium.loni.ucla.edu//usr/local/loniWorkflows/BrainParser/brainparser.sh" sourceCode="" icon="/9j/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0aHBwgJC4nICIsIxwcKDcpLDAx
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xvxt+KUfk3PhHR2Vy4AvLlW+7zny1x34GT74r59oooooorQQUUUUUUUUAFFFFFFFFABRRRX/2Q==" posX="80" posY="70" rotation="1">
<authors>
<author fullName="Mubeena Mirza" email="" website="" />
</authors>
<executableAuthors>
<author fullName="Zhuowen Tu" email="" website="" />
<author fullName="Bruce Liu" email="" website="" />
</executableAuthors>
<metadata>
<data key="__creationDateKey" value="Tue Sep 11 10:28:28 PDT 2007" />
</metadata>
<input id="BrainParser_1.Structure" name="Structure" description="0: segmentation sub-cortical structures
1: sulci detection" required="false" enabled="true" order="0" prefix="-p" prefixSpaced="true" prefixAllArgs="false">
<format type="Enumerated" cardinality="1">
<enumeration>0</enumeration>
<enumeration>1</enumeration>
<enumeration>2</enumeration>
</format>
<values>
<value>2</value>
</values>
</input>
<input id="BrainParser_1.Testing" name="Testing" description="0: perform segmentation/detection
1: perform training
" required="false" enabled="true" order="1" prefix="-r" prefixSpaced="true" prefixAllArgs="false">
<format type="Enumerated" cardinality="1">
<enumeration>0</enumeration>
<enumeration>1</enumeration>
</format>
<values>
<value>0</value>
</values>
</input>
<input id="BrainParser_1.SourceFile" name="Source File" description="In testing, it points to the source file in training, it points directory in which the training volumes are saved.
" required="true" enabled="true" order="2">
<format type="File" cardinality="1">
<fileTypes>
<filetype name="Analyze Image" extension="img" description="Analyze Image">
<need>hdr</need>
</filetype>
<filetype name="Analyze Image" extension="img" description="Analyze Image file">
<need>hdr</need>
</filetype>
</fileTypes>
</format>
</input>
<output id="BrainParser_1.TargetFile" name="Target File" description="In testing, it points to the target file in training, it points directory in which the trained classifiers are saved.
" required="true" enabled="true" order="3">
<format type="File" cardinality="1">
<fileTypes>
<filetype name="Analyze Image" extension="img" description="Analyze Image">
<need>hdr</need>
</filetype>
</fileTypes>
</format>
</output>
<input id="BrainParser_1.ModelsDirectory" name="Models Directory" description="Directory of trained models." required="false" enabled="true" order="4" prefix="-m" prefixSpaced="true" prefixAllArgs="false">
<format type="Directory" cardinality="1" />
<values>
<value>pipeline://cranium.loni.ucla.edu//usr/local/loniWorkflows/BrainParser/56_Structure</value>
</values>
</input>
<input id="BrainParser_1.NumberofStructures" name="Number of Structures" description="Only effective in training." required="false" enabled="false" order="5" prefix="-n" prefixSpaced="true" prefixAllArgs="false">
<format type="Number" cardinality="1" />
<values>
<value>1</value>
</values>
</input>
<input id="BrainParser_1.NumberofIterations" name="Number of Iterations" required="false" enabled="false" order="6" prefix="-t" prefixSpaced="true" prefixAllArgs="false">
<format type="Number" cardinality="1" />
</input>
<input id="BrainParser_1.SmoothnessFactor" name="Smoothness Factor" description="Defalut=0.5, typical 0.0~2.0." required="true" enabled="true" order="7" prefix="-s" prefixSpaced="true" prefixAllArgs="false">
<format type="Number" cardinality="1" />
<values>
<value>2.0</value>
</values>
</input>
</module>
我编写的Python代码如下所示：
if __name__ == '__main__':
soup = BeautifulSoup (
open('test.xml'),
'lxml'
)
for e in soup.find_all('module',attrs={'name':'Brain Parser'}):
for i in e.find_all('input'):
print i.prettify()
这就是结果：
<input description="0: segmentation sub-cortical structures 1: sulci detection" enabled="true" id="BrainParser_1.Structure" name="Structure" order="0" prefix="-p" prefixallargs="false" prefixspaced="true" required="false"/>
<input description="0: perform segmentation/detection 1: perform training" enabled="true" id="BrainParser_1.Testing" name="Testing" order="1" prefix="-r" prefixallargs="false" prefixspaced="true" required="false"/>
<input description="In testing, it points to the source file in training, it points directory in which the training volumes are saved. " enabled="true" id="BrainParser_1.SourceFile" name="Source File" order="2" required="true"/>
<input description="Directory of trained models." enabled="true" id="BrainParser_1.ModelsDirectory" name="Models Directory" order="4" prefix="-m" prefixallargs="false" prefixspaced="true" required="false"/>
<input description="Only effective in training." enabled="false" id="BrainParser_1.NumberofStructures" name="Number of Structures" order="5" prefix="-n" prefixallargs="false" prefixspaced="true" required="false"/>
<input enabled="false" id="BrainParser_1.NumberofIterations" name="Number of Iterations" order="6" prefix="-t" prefixallargs="false" prefixspaced="true" required="false"/>
<input description="Defalut=0.5, typical 0.0~2.0." enabled="true" id="BrainParser_1.SmoothnessFactor" name="Smoothness Factor" order="7" prefix="-s" prefixallargs="false" prefixspaced="true" required="true"/>
正如您所看到的，它认为input没有子元素，但事实并非如此。 我做了一些戳，似乎像value和format元素被解析为module元素的子元素。 任何人都可以帮忙吗？
1 个解决方案
解决方案1
3 已采纳 2012-11-22 15:32:09
您正在使用"lxml"调用BeautifulSoup ，它告诉它使用lxml解析器并将输入解析为HTML。 （在HTML中， input标签是自动关闭的，没有子节点，因此你的字符串不是有效的HTML.BeautifulSoup执行其神奇的HTML修复并决定你意味着input标签立即关闭，这就是为什么你不是看到任何孩子。）
你想用"xml"来调用它，它告诉它输入是一个XML文档。
Beautifulsoup4，解析 Tableau XML 文件，并写入文件
[英]Beautifulsoup4, parsing Tableau XML file, and writing to file
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