for mapping in root.findall('*//{http://maven.apache.org/POM/4.0.0}mappings'):
    logging.info(mapping)
for prop in mapping.findall('./{http://maven.apache.org/POM/4.0.0}property'):
    logging.info(prop.find('{http://maven.apache.org/POM/4.0.0}name').text +
        ' => ' + prop.find('{http://maven.apache.org/POM/4.0.0}value').text)
Reading Maven Pom xml in Python