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- from aiohttp.frozenlist import FrozenList
- __all__ = ("Signal",)
- class Signal(FrozenList):
- """Coroutine-based signal implementation.
- To connect a callback to a signal, use any list method.
- Signals are fired using the send() coroutine, which takes named
- arguments.
- """
- __slots__ = ("_owner",)
- def __init__(self, owner):
- super().__init__()
- self._owner = owner
- def __repr__(self):
- return "<Signal owner={}, frozen={}, {!r}>".format(
- self._owner, self.frozen, list(self)
- )
- async def send(self, *args, **kwargs):
- """
- Sends data to all registered receivers.
- """
- if not self.frozen:
- raise RuntimeError("Cannot send non-frozen signal.")
- for receiver in self:
- await receiver(*args, **kwargs) # type: ignore
|
