Look up the cached copy of obj. Returns None when absent.
(self, obj)
| 84 | return list(self._objects.keys()) |
| 85 | |
| 86 | def get(self, obj): |
| 87 | """Look up the cached copy of obj. Returns None when absent.""" |
| 88 | key = self._key_func(obj) |
| 89 | return self.get_by_key(key) |
| 90 | |
| 91 | def get_by_key(self, key): |
| 92 | """Look up an object by key. Returns None when absent.""" |