testxml.py

#!/usr/bin/env python3
# -*- coding: utf-8; mode: python -*-

"""A test suite for all sorts of XML modifications."""

from lxml import etree

NSMAP = { "tei" : "http://www.tei-c.org/ns/1.0",
          "eoa" : "http://www.edition-open-access.de/ns"}

def remove_namespace(doc, namespace):
    """Remove namespace in the passed document in place.

    Thank you, https://homework.nwsnet.de/releases/45be/
    """

    ns = u'{%s}' % namespace
    nsl = len(ns)
    for elem in doc.getiterator():
        if elem.tag.startswith(ns):
            elem.tag = elem.tag[nsl:]
# def remove_namespace ends here

# example (import ElementTree as ET)
# elem = ET.fromstring(some_xml_string)
# remove_namespace(elem, u'http://earth.google.com/kml/2.0')

ab_string = """<a>A Text <b>B Text</b>B Tail.</a>"""
cde_string = """<c><d/>D Tail <e>E Text</e>E Tail.</c>"""
fragment_string = """<p xmlns="http://www.tei-c.org/ns/1.0" xmlns:tei="http://www.tei-c.org/ns/1.0">Klein <hi rend="italic">anfangen</hi> weiter.</p>"""
fragment_string2 = """<p xmlns="http://www.tei-c.org/ns/1.0">Klein <hi rend="italic">anfangen</hi> weiter.</p>"""

ab = etree.fromstring(ab_string)
cde = etree.fromstring(cde_string)
fragment = etree.fromstring(fragment_string)
fragment2 = etree.fromstring(fragment_string2)

xmlbit = fragment2

remove_namespace(xmlbit, NSMAP['tei'])

first_text = xmlbit.text
output = f"{first_text}"
fchildren = xmlbit.getchildren()

for child in fchildren:
    remove_namespace(child, NSMAP['tei'])
    ct = etree.tostring(child).decode('utf-8')
    forget = f"{ct[:]}"
    print(forget, "forget")
    geton = etree.fromstring(forget)
    if geton.tag == "hi":
        print("yes")
        if geton.get("rend") == "italic":
            geton.tag = "{}em"
        del geton.attrib["rend"]
        print(geton.tag)
    else:
        print("no", geton.tag)

    output += f"{etree.tostring(geton).decode('utf-8')}"

print(output, "end")