22 lines
401 B
Python
22 lines
401 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 Command(ABC):
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"""Интерфейс команды (паттерн Command)."""
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@abstractmethod
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def execute(self) -> None:
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"""Выполнить команду."""
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pass
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@abstractmethod
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def undo(self) -> None:
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"""Отменить команду."""
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pass
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