python observer pattern

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Yannick
23 Nov 2018
1class Event(object):
2    pass
3
4class Observable(object):
5    def __init__(self):
6        self.callbacks = []
7    def subscribe(self, callback):
8        self.callbacks.append(callback)
9    def fire(self, **attrs):
10        e = Event()
11        e.source = self
12        for k, v in attrs.iteritems():
13            setattr(e, k, v)
14        for fn in self.callbacks:
15            fn(e)
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