Add message and return assigned key.
(self, message)
| 40 | self._factory = factory |
| 41 | |
| 42 | def add(self, message): |
| 43 | """Add message and return assigned key.""" |
| 44 | raise NotImplementedError('Method must be implemented by subclass') |
| 45 | |
| 46 | def remove(self, key): |
| 47 | """Remove the keyed message; raise KeyError if it doesn't exist.""" |
no outgoing calls