lxml_objectify_test.py

from lxml import objectify
xml = objectify.fromstring("""<?xml version="1.0" encoding="utf-8"?>
<cfdi:Comprobante
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:cfdi="http://www.sat.gob.mx/cfd/3"
    xsi:schemaLocation="http://www.sat.gob.mx/cfd/3 http://www.sat.gob.mx/sitio_internet/cfd/3/cfdv32.xsd"
    xmlns:tfd="http://www.sat.gob.mx/TimbreFiscalDigital"
    >
  <cfdi:Emisor rfc="XYZU8801017YA" nombre="MOYLOP260">
    <cfdi:DomicilioFiscal calle="Calle value"/>
    <cfdi:RegimenFiscal Regimen="Regimen value" />
  </cfdi:Emisor>
  <cfdi:Complemento xmlns:tfd="http://www.sat.gob.mx/TimbreFiscalDigital">
    <tfd:TimbreFiscalDigital
      xsi:schemaLocation="http://www.sat.gob.mx/TimbreFiscalDigital http://www.sat.gob.mx/TimbreFiscalDigital/TimbreFiscalDigital.xsd"
      xmlns:tfd="http://www.sat.gob.mx/TimbreFiscalDigital"
        version="1.0" UUID="UUID value"/>
  </cfdi:Complemento>
</cfdi:Comprobante>""")
print "xml.Emisor.DomicilioFiscal.get('calle'):", xml.Emisor.DomicilioFiscal.get('calle')
print "xml.Emisor.RegimenFiscal.get('Regimen'):", xml.Emisor.RegimenFiscal.get('Regimen')
tfd = xml.Complemento.xpath('tfd:TimbreFiscalDigital[1]',
                            namespaces={'tfd': 'http://www.sat.gob.mx/TimbreFiscalDigital'})
print "tfd[0].get('UUID'):", tfd[0].get('UUID')

tfd = xml.Complemento.xpath('tfd:TimbreFiscalDigital[1]', namespaces=xml.nsmap)
print "tfd[0].get('UUID'):", tfd[0].get('UUID')

print "uuid with 100%% xpath", xml.Complemento.xpath('tfd:TimbreFiscalDigital[1]/@UUID', namespaces=xml.nsmap)

print "uuid with 100%% xpath not list", (xml.Complemento.xpath('tfd:TimbreFiscalDigital[1]/@UUID', namespaces=xml.nsmap) + [0])[0]

# print "dir(xml.Complemento)", [attr for attr in dir(xml.Complemento) if not attr.startswith('_')]
try:
    print "xml.Complemento.TimbreFiscalDigital: ", xml.Complemento.TimbreFiscalDigital
except AttributeError:
    print "Why I have a AttributeError here?"



tfd2 = objectify.fromstring("""<?xml version="1.0" encoding="utf-8"?>
<tfd:TimbreFiscalDigital
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.sat.gob.mx/TimbreFiscalDigital http://www.sat.gob.mx/TimbreFiscalDigital/TimbreFiscalDigital.xsd"
  xmlns:tfd="http://www.sat.gob.mx/TimbreFiscalDigital"
  version="1.0" UUID="UUID value"/>""")
print "tfd2.get('UUID'):", tfd[0].get('UUID')