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3 (��V� � @ s& d Z ddlZi Zddd�Zdd� ZdS ) a� Class-based event handlers A light-weight event-handler framework based on event classes. Handlers are registered for event classes: >>> import zope.event.classhandler >>> class MyEvent(object): ... def __repr__(self): ... return self.__class__.__name__ >>> def handler1(event): ... print("handler1 %r" % event) >>> zope.event.classhandler.handler(MyEvent, handler1) Descriptor syntax: >>> @zope.event.classhandler.handler(MyEvent) ... def handler2(event): ... print("handler2 %r" % event) >>> class MySubEvent(MyEvent): ... pass >>> @zope.event.classhandler.handler(MySubEvent) ... def handler3(event): ... print("handler3 %r" % event) Subscribers are called in class method-resolution order, so only new-style event classes are supported, and then by order of registry. >>> import zope.event >>> zope.event.notify(MySubEvent()) handler3 MySubEvent handler1 MySubEvent handler2 MySubEvent � NFc sT |dkr� fdd�S t s&tjjjt� � t kr:|gt � < nt � j|� |rPtS dS )z�Define an event handler for a (new-style) class. This can be called with a class and a handler, or with just a class and the result used as a handler decorator. Nc s t � | d�S )NT)�handler)�func)� event_class� �"/usr/lib/python3.6/classhandler.py�<lambda>6 s zhandler.<locals>.<lambda>)�registry�zope�eventZ subscribers�append�dispatchr )r Zhandler_Z decoratorr )r r r / s r c C s4 x.| j jD ]"}x tj|f �D ] }|| � q W q W d S )N)� __class__�__mro__r �get)r r r r r r r C s r )NF)�__doc__Z zope.eventr r r r r r r r �<module>* s
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