| 416 | |
| 417 | @classmethod |
| 418 | def create(cls, allowed_keys): |
| 419 | allowed_keys_tuple = tuple( |
| 420 | ("_reserved_" + k if k in cls._special_fields else k) for k in allowed_keys |
| 421 | ) |
| 422 | allowed_keys = frozenset(allowed_keys_tuple) |
| 423 | if allowed_keys not in cls._classes: |
| 424 | |
| 425 | class SpecificStrictDict(cls): |
| 426 | __slots__ = allowed_keys_tuple |
| 427 | |
| 428 | def __repr__(self): |
| 429 | return "{%s}" % ", ".join( |
| 430 | f'"{k!s}": {v!r}' for k, v in self.items() |
| 431 | ) |
| 432 | |
| 433 | cls._classes[allowed_keys] = SpecificStrictDict |
| 434 | return cls._classes[allowed_keys] |
| 435 | |
| 436 | |
| 437 | class LazyReference(DBRef): |