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from blinker import signal,Signal

initialized = signal('initialized')
initialized is signal('initialized')
sig = Signal()

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from blinker import signal
send_data = signal('send-data')
@send_data.connect
def receive_data(sender, **kw):
    print("Caught signal from %r, data %r" % (sender, kw))
    return 'received!'
result = send_data.send('anonymous', abc=123)
print(result)  

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from blinker import signal

dice_roll = signal('dice_roll')
@dice_roll.connect_via(1)
@dice_roll.connect_via(3)
@dice_roll.connect_via(5)
def odd_subscriber(sender):
    print("Observed dice roll %r." % sender)
result = dice_roll.send(3)

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from blinker import signal

initialized = signal("initialized")


@initialized.connect
def initialize_call1():
    print("initialize_call1")


@initialized.connect
def initialize_call2():
    print("initialize_call2")


@initialized.connect
def initialize_call3():
    print("initialize_call3")


for key, weakref in initialized.receivers.items():
    func = weakref()
    func()