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python3.7
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aiosignal
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from frozenlist import FrozenList __version__ = "1.2.0a0" __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
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