Find a XML node with a specific child using minidom

Question

I am looking for a way to filter this XML string and print the "identifiant" value where the "source" field is HAL.

    <sudoc service="idref2source">
        <query>
            <ppn>115565329</ppn>
            <result>
                <source>HAL</source>
                <identifiant>chl</identifiant>
            </result>
        </query>
        <query>
            <ppn>115565329</ppn>
            <result>
                <source>VIAF</source>
                <identifiant>http://viaf.org/viaf/202196105</identifiant>
            </result>
        </query>
    </sudoc>

I only parsed the string using minidom

dom = parseString(r.content)

Many thanks !

Answer 1

Below - 1 line of code

import xml.etree.ElementTree as ET

xml = '''
 <sudoc service="idref2source">
        <query>
            <ppn>115565329</ppn>
            <result>
                <source>HAL</source>
                <identifiant>chl</identifiant>
            </result>
        </query>
        <query>
            <ppn>115565329</ppn>
            <result>
                <source>VIAF</source>
                <identifiant>http://viaf.org/viaf/202196105</identifiant>
            </result>
        </query>
    </sudoc>
'''

root = ET.fromstring(xml)
hals = [s.find('identifiant').text for s in root.findall('.//result/[source="HAL"]')]
print(hals)