django在运行时创建信号

我一直在尝试一种在运行时处理信号创建的方法，我想到了以下代码，该代码从配置/表中读取并注册post_save连接

def _send_to_messaging_notify(**kwargs):
    """ _send_to_messaging_notify
    """
    if kwargs.get('created'):
        instance = kwargs.get('instance')
        ct = ContentType.objects.get_for_model(instance)
        notify.apply_async(args=[instance.pk, ct.pk, kwargs.get('when')])


def create_function(name, args):
    def y(**kwargs):
        kwargs.update({'when': inspect.stack()[0][3]})
        print 'signal executed on {0}'.format(kwargs.get('sender'))
        _send_to_messaging_notify(**kwargs)

    y_code = types.CodeType(args, \
                            y.func_code.co_nlocals, \
                            y.func_code.co_stacksize, \
                            y.func_code.co_flags, \
                            y.func_code.co_code, \
                            y.func_code.co_consts, \
                            y.func_code.co_names, \
                            y.func_code.co_varnames, \
                            y.func_code.co_filename, \
                            name, \
                            y.func_code.co_firstlineno, \
                            y.func_code.co_lnotab)

    return types.FunctionType(y_code, y.func_globals, name)


def load_signals():
    """ load_signals
    """
    from default_senders import senders
    #
    for k in senders.iterkeys():
        post_save.connect(create_function(str(k), 0), sender=load_model(senders[k].get('default_content_type')),
                          dispatch_uid=k)


load_signals()

create_function是在运行时创建信号处理程序，然后使用 post_save.connect

当我尝试执行此

myfunc = create_function(str(k), 0)
myfunc(sender='xxx')

它工作正常，但是当挂接到post_save.connect时，当目标模型接收到post_save操作时，它什么也没做。有人可以请教吗