def post_process_3mf(filename):
print('post processing 3MF file (extracting XML data from ZIP): ', filename)
from zipfile import ZipFile
xml_content = ZipFile(filename).read("3D/3dmodel.model")
xml_content = re.sub('UUID="[^"]*"', 'UUID="XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXX"', xml_content.decode('utf-8'))
with open(filename, 'wb') as xml_file:
xml_file.write(xml_content.encode('utf-8'))
