13 lines
317 B
Python
13 lines
317 B
Python
class Subject:
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def __init__(self):
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self.observers = []
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def attach(self, observer):
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self.observers.append(observer)
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def detach(self, observer):
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self.observers.remove(observer)
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def notify(self, event):
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for observer in self.observers:
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observer.update(event) |