code: def get_identities(self):
          
          ret=[]
          l=self.xpath_ctxt.xpathEval("d:identity")
          if l is not None:
              for i in l:
                  ret.append(DiscoIdentity(self,i))
          return ret
docs: List the identity objects contained in `self`.
  
          :return: the list of identities.
          :returntype: `list` of `DiscoIdentity`