def to_tree(self, tagname=None): if tagname is None: tagname = self.tagname attrs = dict(self) el = Element(tagname, attrs) for n in self.__nested__: value = getattr(self, n) if isinstance(value, tuple): if hasattr(el, 'extend'): el.extend(self._serialise_nested(value)) else: # py26 nolxml for _ in self._serialise_nested(value): el.append(_) elif value: SubElement(el, n, val=safe_string(value)) for child in self.__elements__: obj = getattr(self, child) if isinstance(obj, tuple): for v in obj: if hasattr(v, 'to_tree'): el.append(v.to_tree(tagname=child)) else: SubElement(el, child).text = v elif obj is not None: el.append(obj.to_tree(tagname=child)) return el