32 lines
717 B
Python
32 lines
717 B
Python
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# https://refactoring.guru/pl/design-patterns/observer/python/example
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from __future__ import annotations
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from abc import ABC, abstractmethod
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class Obserwowany(ABC):
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obserwatorzy = []
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def dolaczObserwatora(self, obserwator: Obserwator):
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self.obserwatorzy.append(obserwator)
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def odlaczObserwatora(self, obserwator: Obserwator):
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self.obserwatorzy.remove(obserwator)
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@abstractmethod
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def powiadomObserwatorow(self):
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"""
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Notify all observers about an event.
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"""
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pass
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class Obserwator(ABC):
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@abstractmethod
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def odbierzPowiadomienie(self, obserwowany: Obserwowany):
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"""
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Receive update from subject.
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"""
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pass
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