How to preserve namespaces when parsing xml via ElementTree in Python

Question

Assume that I\'ve the following XML which I want to modify using Python\'s ElementTree:

Answer 1

Here is the way to preserve the namespaces' prefix and URI:

def register_all_namespaces(filename):
    namespaces = dict([node for _, node in ET.iterparse(filename, events=['start-ns'])])
    for ns in namespaces:
        ET.register_namespace(ns, namespaces[ns])

This method should be called before calling the [ET].write() method.