code: def append_attributes(self, content):
          
          attributes = AttrList(content.node.attributes)
          for attr in attributes.real():
              name = attr.name
              value = attr.value
              self.append_attribute(name, value, content)
docs: Append attribute nodes into L{Content.data}.
          Attributes in the I{schema} or I{xml} namespaces are skipped.
          @param content: The current content being unmarshalled.
          @type content: L{Content}