pip install blinker python from blinker import signal my_signal = signal("my_signal") python sender_object = SomeClass() extra_data = {"key": "value"} my_signal.send(sender=sender_object, **extra_data) python def handle_signal(sender, **kwargs): print("Signal received from:", sender) print("Extra data:", kwargs) my_signal.connect(handle_signal) python my_signal.disconnect(handle_signal) python @my_signal.connect def handle_signal(sender, **kwargs): print("Signal received from:", sender) print("Extra data:", kwargs) my_signal.send(sender=sender_object, **extra_data)