17 lines
315 B
Python
17 lines
315 B
Python
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#!/usr/bin/env python
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# coding: utf-8
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# In[ ]:
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from abc import ABC, abstractmethod
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class Observer(ABC):
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"""Интерфейс наблюдателя (паттерн Observer)."""
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@abstractmethod
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def update(self, event: str) -> None:
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"""Обработчик события."""
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pass
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