How to Extract Node Attribute Values from XML Using ElementTree?

Extracting Node Attribute Values from XML Using ElementTree

parsing XML data is often necessary to extract specific information. This question addresses the task of obtaining values of a particular attribute from specific nodes within an XML document.

Accessing Attribute Values with ElementTree

The recommended approach for this task is to utilize the ElementTree library, which offers a user-friendly API for navigating and manipulating XML data. To use ElementTree:

1. Parse the XML document to create an Element instance:

   import xml.etree.ElementTree as ET
   root = ET.parse('xml_file.xml').getroot()

2. Use the findall() method to find all matching nodes in the document:

   matches = root.findall('desired_node_path')

3. Retrieve the attribute value using the get() method:

   attribute_value = match.get('attribute_name')

Example

For the provided XML snippet:

<foo>
   <bar>
      <type foobar="1"/>
      <type foobar="2"/>
   </bar>
</foo>

to extract the values of the foobar attribute for all instances of the type node, you would use the following code:

for type_node in root.findall('bar/type'):
    foobar_value = type_node.get('foobar')
    print(foobar_value)

This code will print the values "1" and "2" to the console.

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