(self, other)
| 431 | return NotImplemented |
| 432 | |
| 433 | def __ror__(self, other): |
| 434 | if isinstance(other, _collections_abc.Mapping): |
| 435 | c = self.__class__() |
| 436 | c.update(other) |
| 437 | c.update(self) |
| 438 | return c |
| 439 | return NotImplemented |
| 440 | |
| 441 | |
| 442 | class finalize: |