nuevas rutinas para almacenar xml.

facho/fe/form_xml.py(DIANWrite): escribe xml a archivo.
facho/fe/form_xml.py(DIANWriteSigned): escribe xml firmado a archivo.

FossilOrigin-Name: fbadde1c5c263033ccaa60c9fb69113829bc405adef684bc3d6497d56f1b95c3

facho/fe/fe.py

@@ -69,8 +69,7 @@ class FeXML(FachoXML):
         self._cn = root.rstrip('/')
         #self.find_or_create_element(self._cn)
 
-    # MACHETE se elimina xml namespace fe
-    def tostringMACHETE(self, **kw):
+    def tostring(self, **kw):
         return super().tostring(**kw)\
             .replace("fe:", "")\
             .replace("xmlns:fe", "xmlns")

facho/fe/form_xml.py

@@ -1,6 +1,7 @@
 from . import fe
 from .form import *
 
+
 class DIANInvoiceXML(fe.FeXML):
     """
     DianInvoiceXML mapea objeto form.Invoice a XML segun
@@ -389,3 +390,16 @@ class DIANInvoiceXML(fe.FeXML):
         fexml.set_payment_mean(invoice)
 
         return fexml
+
+
+def DIANWrite(xml, filename):
+    document = xml.tostring(xml_declaration=True, encoding='UTF-8')
+    with open(filename, 'w') as f:
+        f.write(document)
+
+        
+def DIANWriteSigned(xml, filename, private_key, passphrase, use_cache_policy=False):
+    document = xml.tostring(xml_declaration=True, encoding='UTF-8')
+    signer = fe.DianXMLExtensionSigner(private_key, passphrase=passphrase, mockpolicy=use_cache_policy)
+    with open(filename, 'w') as f:
+        f.write(signer.sign_xml_string(document))