(self, other)
| 529 | return NotImplemented |
| 530 | |
| 531 | def __ror__(self, other): |
| 532 | if isinstance(other, _collections_abc.Mapping): |
| 533 | c = self.__class__() |
| 534 | c.update(other) |
| 535 | c.update(self) |
| 536 | return c |
| 537 | return NotImplemented |
| 538 | |
| 539 | |
| 540 | class finalize: |