Python XML Parsing issue

Question

I have an XML as attached below and using python minidom to parse the build.xml. I am trying below python code to parse and retrieve the "name" and "value" tag. I am trying to retrieve the values for "SE_CONFIG","SE_ARCH","PREBUILDID" which have respective value install-csu,macosx,prebuild_7701.

Having following challenges.

What is better pythonic way to retrieve respective name and value pair

How should I catch the exception if there is no "value"

<?xml version='1.0' encoding='UTF-8'?>
<build>
  <actions>
    <hudson.model.ParametersAction>
      <parameters>
        <hudson.model.StringParameterValue>
          <name>StartFrom</name>
          <description>&lt;h3&gt;: Trigger downstreamfor this platform&lt;br&gt;</description>
          <value>Fetch_Source</value>
        </hudson.model.StringParameterValue>
        <hudson.model.StringParameterValue>
          <name>SE_CONFIG</name>
          <description></description>
          <value>install-csu</value>
        </hudson.model.StringParameterValue>
        <hudson.model.StringParameterValue>
          <name>EMAIL_RCPT</name>
          <description>Please enter your email address.</description>
          <value></value>
        </hudson.model.StringParameterValue>
        <hudson.model.StringParameterValue>
          <name>SE_ARCH</name>
          <description></description>
          <value>macosx</value>
        </hudson.model.StringParameterValue>
        <hudson.model.StringParameterValue>
          <name>PREBUILDID</name>
          <description></description>
          <value>prebuild_7701</value>
        </hudson.model.StringParameterValue>
        <hudson.model.StringParameterValue>
          <name>RE_DESCRIPTION</name>
          <description></description>
          <value></value>
        </hudson.model.StringParameterValue>
        <hudson.model.StringParameterValue>
          <name>BUILD_PRODUCT</name>
          <description></description>
          <value>release</value>
        </hudson.model.StringParameterValue>
      </parameters>
    </hudson.model.ParametersAction>  
  </actions>
  <number>8065</number>
  <result>SUCCESS</result>
  <duration>3652965</duration>
  <charset>US-ASCII</charset>
  <keepLog>false</keepLog>
  <workspace>/Users/someuser/workspace/build-mac</workspace>
  <hudsonVersion>3.2.1</hudsonVersion>
  <scm class="hudson.scm.NullChangeLogParser"/>
  <culprits/>
</build>

    import xml.dom.minidom
    DOMTree=xml.dom.minidom.parse("build.xml")
    collection=DOMTree.documentElement
    string_par=collection.getElementsByTagName("hudson.model.StringParameterValue")
    for each_node in string_par:
       print each_node.getElementsByTagName('name')[0].childNodes[0].nodeValue
       print each_node.getElementsByTagName('value')[0].childNodes[0].nodeValue

    StartFrom
    Fetch_Source
    SE_CONFIG
    install-csu
    EMAIL_RCPT
    Traceback (most recent call last):
    File "<stdin>", line 3, in <module
    IndexError: list index out of range

Check the length of the childNodes list. If it's zero, you know there wasn't a value. — John Gordon
– John Gordon, Commented Aug 30, 2016 at 15:29
Thanks @JohnGordon for the suggestion. Is there a easier\better way to retrieve the name,value pair. I believe the code I written is complex and could have been lot more simpler — techrawther
– techrawther, Commented Aug 30, 2016 at 15:36

FelipeS · Accepted Answer · 2016-08-30 15:43:07Z

3

Since you asked if there is another way, you can try using xml.etree.ElementTree.

There is a cool example in the following link, the tags can be defined in the for loop:

http://chimera.labs.oreilly.com/books/1230000000393/ch06.html#_solution_96

I hope it helps.

answered Aug 30, 2016 at 15:43

FelipeS

3063 silver badges11 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

techrawther Over a year ago

Thanks @L.Felipe I was able to get it through ElementTree as below.

techrawther · Accepted Answer · 2016-08-31 07:59:26Z

1

Get it done through ElementTree

    doc =xml.etree.ElementTree.parse('build.xml')
    for node in doc.iter('hudson.model.StringParameterValue'):
        print str(node.find('name').text) + '\t' + str(node.find('value').text)

answered Aug 31, 2016 at 7:59

techrawther

1834 silver badges15 bronze badges

Collectives™ on Stack Overflow

Python XML Parsing issue

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related