Python类结构…prep()方法?

我们有一个元类、一个类和一个子类用于警报系统:

class AlertMeta(type):
"""
Metaclass for all alerts    
Reads attrs and organizes AlertMessageType data
"""
def __new__(cls, base, name, attrs):
    new_class = super(AlertMeta, cls).__new__(cls, base, name, attrs)
    # do stuff to new_class
    return new_class

class BaseAlert(object):
"""
BaseAlert objects should be instantiated
in order to create new AlertItems.
Alert objects have classmethods for dequeue (to batch AlertItems)
and register (for associated a user to an AlertType and AlertMessageType)

If the __init__ function recieves 'dequeue=True' as a kwarg, then all other
arguments will be ignored and the Alert will check for messages to send
"""

__metaclass__ = AlertMeta

def __init__(self, **kwargs):
    dequeue = kwargs.pop('dequeue',None)
    if kwargs:
        raise ValueError('Unexpected keyword arguments: %s' % kwargs)
    if dequeue:
        self.dequeue()
    else:
        # Do Normal init stuff

def dequeue(self):
    """
    Pop batched AlertItems
    """
    # Dequeue from a custom queue

class CustomAlert(BaseAlert):
    def __init__(self,**kwargs):
        # prepare custom init data
        super(BaseAlert, self).__init__(**kwargs)

我们希望能够创建BaseAlert(CustomAlert)的子类,使我们能够运行出列,并能够运行自己的类 __init__ 密码我们认为有三种方法可以做到这一点:

1. 添加一个prep()方法,该方法在BaseAlert中返回True,并由 __初始化__ .Child类可以定义自己的prep()方法。
2. 使dequeue()成为类方法——然而,dequeue()的许多功能都需要非类方法——因此我们也必须使这些类方法成为类方法。
3. 创建一个新类来处理队列。这个类会扩展BaseAlert吗?

有没有处理这种情况的标准方法?