# coding:utf8

from django.dispatch import Signal
from django.dispatch import receiver

custom_signal = Signal()

class Demo2:

    def __init__():
        print "__init__"
    pass

class Demo:

    def __init__():
        print "__init__"
    pass

def ak():
    pass

@receiver(custom_signal, sender=ak)
def my_callback(sender, **more):
    print sender
    print more
    print "my callback called"

@receiver(custom_signal)
def my_callback(sender, **more):
    print sender
    print more
    print "my callback called"

custom_signal.send_robust(sender=ak,  aa=1, bb=2)
custom_signal.send(sender=Demo2,  cc=1, dd=2)