se adiciona FachoXml.get_element_attribute para obtener atributo de xpath

FossilOrigin-Name: b3be980dca00b8bd117c4a7e176b8d3a9bac804a1200ad4b7cc39e0f4ab0be15

docs/DIAN/nomina/README.md

@@ -2,6 +2,10 @@
 
 * se extrae documento tecnico de resolucion usando **pdfarranger**
 
+## CUNE
+
+ ver 8.1.1.1 del archivo **Resolucion 000013 de 11-02-2021.pdf**
+
 # enlaces
 
 * https://www.dian.gov.co/impuestos/Paginas/Sistema-de-Factura-Electronica/documento-soporte-de-pago-de-nomina-electronica.aspx

facho/facho.py

@@ -104,6 +104,9 @@ class LXMLBuilder:
     def get_text(self, elem):
         return elem.text
 
+    def get_attribute(self, elem, key):
+        return elem.attrib[key]
+
     def set_attribute(self,  elem, key, value):
         elem.attrib[key] = value
 
@@ -276,6 +279,10 @@ class FachoXML:
             self.builder.set_attribute(elem, k, v)
         return self
 
+    def get_element_attribute(self, xpath, attribute):
+        elem = self.get_element(xpath)
+        return self.builder.get_attribute(elem, attribute)
+
     def get_element(self, xpath):
         xpath = self.fragment_prefix + self._path_xpath_for(xpath)
         return self.builder.xpath(self.root, xpath)

tests/test_facho.py

@@ -204,3 +204,8 @@ def test_facho_xml_set_element_attribute_valid_validation():
 
     xml.set_element_validator('./Id', lambda text, attrs: attrs['code'] == 'ABC')
     xml.set_element('./Id', 'mero', code = 'ABC')
+
+def test_facho_xml_get_element_attribute():
+    xml = facho.FachoXML('root')
+    xml.set_element('./Id', 'mero', code = 'ABC')
+    assert xml.get_element_attribute('/root/Id', 'code') == 'ABC'