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python: Command Pattern

news 2026/3/27 3:11:48

# encoding: utf-8
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：命令模式（Command Pattern）
# Author    : geovindu,Geovin Du 涂聚文.
# IDE       : PyCharm 2023.1 python 3.11
# OS        : windows 10
# database  : mysql 9.0 sql server 2019, postgreSQL 17.0  oracle 21c Neo4j
# Datetime  : 2026/2/18 21:09
# User      : geovindu
# Product   : PyCharm
# Project   : pydesginpattern
# File      : JewelCraftsman.py
# explain   : 学习from abc import ABC, abstractmethod# -------------------------- 1. 接收者（Receiver）：珠宝工匠 --------------------------
class JewelCraftsman(object):"""珠宝工匠（真正执行具体操作的接收者）"""def polish_ring(self, ring_type: str):"""抛光戒指Args:ring_type:Returns:"""print(f"工匠正在抛光 {ring_type} 戒指，使其恢复光泽✨")def inlay_diamond(self, necklace: str, diamond_size: str):"""给项链镶嵌钻石Args:necklace:diamond_size:Returns:"""print(f"工匠正在给 {necklace} 项链镶嵌 {diamond_size} 钻石💎")def clean_necklace(self, necklace: str):"""清洗项链Args:necklace:Returns:"""print(f"工匠正在超声波清洗 {necklace} 项链，去除污渍🧼")# encoding: utf-8
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：命令模式（Command Pattern）
# Author    : geovindu,Geovin Du 涂聚文.
# IDE       : PyCharm 2023.1 python 3.11
# OS        : windows 10
# database  : mysql 9.0 sql server 2019, postgreSQL 17.0  oracle 21c Neo4j
# Datetime  : 2026/2/18 21:11
# User      : geovindu
# Product   : PyCharm
# Project   : pydesginpattern
# File      : JewelCommand.py
# explain   : 学习from abc import ABC, abstractmethod# -------------------------- 2. 命令抽象类（Command） --------------------------
class JewelCommand(ABC):"""珠宝操作命令的抽象基类"""@abstractmethoddef execute(self):"""执行命令Returns:"""pass@abstractmethoddef undo(self):"""撤销命令（可选，增强功能）Returns:"""pass

# encoding: utf-8
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：命令模式（Command Pattern）
# Author    : geovindu,Geovin Du 涂聚文.
# IDE       : PyCharm 2023.1 python 3.11
# OS        : windows 10
# database  : mysql 9.0 sql server 2019, postgreSQL 17.0  oracle 21c Neo4j
# Datetime  : 2026/2/18 21:13
# User      : geovindu
# Product   : PyCharm
# Project   : pydesginpattern
# File      : PolishRingCommand.py
# explain   : 学习from CommandPattern.JewelCommand import JewelCommand
from CommandPattern.JewelCraftsman import JewelCraftsman# -------------------------- 3. 具体命令（Concrete Command） --------------------------
class PolishRingCommand(JewelCommand):"""抛光戒指的具体命令"""def __init__(self, craftsman: JewelCraftsman, ring_type: str):"""Args:craftsman:ring_type:"""# 绑定接收者和命令参数self.craftsman = craftsmanself.ring_type = ring_typeself.executed = False  # 标记是否已执行def execute(self):"""Returns:"""self.craftsman.polish_ring(self.ring_type)self.executed = Truedef undo(self):"""Returns:"""if self.executed:print(f"撤销操作：停止抛光 {self.ring_type} 戒指🔙")self.executed = False# encoding: utf-8
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：命令模式（Command Pattern）
# Author    : geovindu,Geovin Du 涂聚文.
# IDE       : PyCharm 2023.1 python 3.11
# OS        : windows 10
# database  : mysql 9.0 sql server 2019, postgreSQL 17.0  oracle 21c Neo4j
# Datetime  : 2026/2/18 21:15
# User      : geovindu
# Product   : PyCharm
# Project   : pydesginpattern
# File      : InlayDiamondCommand.py
# explain   : 学习
from CommandPattern.JewelCommand import JewelCommand
from CommandPattern.JewelCraftsman import JewelCraftsman# -------------------------- 3. 具体命令（Concrete Command） --------------------------class InlayDiamondCommand(JewelCommand):"""镶嵌钻石的具体命令"""def __init__(self, craftsman: JewelCraftsman, necklace: str, diamond_size: str):"""Args:craftsman:necklace:diamond_size:"""self.craftsman = craftsmanself.necklace = necklaceself.diamond_size = diamond_sizeself.executed = Falsedef execute(self):"""Returns:"""self.craftsman.inlay_diamond(self.necklace, self.diamond_size)self.executed = Truedef undo(self):"""Returns:"""if self.executed:print(f"撤销操作：取出 {self.necklace} 项链上的 {self.diamond_size} 钻石🔙")self.executed = False# encoding: utf-8
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：命令模式（Command Pattern）
# Author    : geovindu,Geovin Du 涂聚文.
# IDE       : PyCharm 2023.1 python 3.11
# OS        : windows 10
# database  : mysql 9.0 sql server 2019, postgreSQL 17.0  oracle 21c Neo4j
# Datetime  : 2026/2/18 21:17
# User      : geovindu
# Product   : PyCharm
# Project   : pydesginpattern
# File      : CleanNecklaceCommand.py
# explain   : 学习from CommandPattern.JewelCommand import JewelCommand
from CommandPattern.JewelCraftsman import JewelCraftsman# -------------------------- 3. 具体命令（Concrete Command） --------------------------class CleanNecklaceCommand(JewelCommand):"""清洗项链的具体命令"""def __init__(self, craftsman: JewelCraftsman, necklace: str):"""Args:craftsman:necklace:"""self.craftsman = craftsmanself.necklace = necklaceself.executed = Falsedef execute(self):"""Returns:"""self.craftsman.clean_necklace(self.necklace)self.executed = Truedef undo(self):"""Returns:"""if self.executed:print(f"撤销操作：停止清洗 {self.necklace} 项链🔙")self.executed = False

# encoding: utf-8
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：命令模式（Command Pattern）
# Author    : geovindu,Geovin Du 涂聚文.
# IDE       : PyCharm 2023.1 python 3.11
# OS        : windows 10
# database  : mysql 9.0 sql server 2019, postgreSQL 17.0  oracle 21c Neo4j
# Datetime  : 2026/2/18 21:18
# User      : geovindu
# Product   : PyCharm
# Project   : pydesginpattern
# File      : JewelWorkbench.py
# explain   : 学习from CommandPattern.JewelCommand import JewelCommand
from CommandPattern.JewelCraftsman import JewelCraftsman# -------------------------- 4. 调用者（Invoker）：珠宝工作台 --------------------------
class JewelWorkbench:"""珠宝工作台（调用者：负责触发命令执行/撤销）"""def __init__(self):self.current_command = None  # 当前执行的命令self.command_history = []  # 命令执行历史（支持批量撤销/回放）def set_command(self, command: JewelCommand):"""设置要执行的命令"""self.current_command = commanddef execute_command(self):"""执行当前命令"""if self.current_command:self.current_command.execute()self.command_history.append(self.current_command)self.current_command = None  # 执行后清空当前命令else:print("没有可执行的珠宝操作命令❌")def undo_last_command(self):"""撤销上一个执行的命令"""if self.command_history:last_cmd = self.command_history.pop()last_cmd.undo()else:print("没有可撤销的珠宝操作命令❌")

# encoding: utf-8
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：命令模式（Command Pattern）
# Author    : geovindu,Geovin Du 涂聚文.
# IDE       : PyCharm 2023.1 python 3.11
# OS        : windows 10
# database  : mysql 9.0 sql server 2019, postgreSQL 17.0  oracle 21c Neo4j
# Datetime  : 2026/2/18 21:20
# User      : geovindu
# Product   : PyCharm
# Project   : pydesginpattern
# File      : CommandBll.py
# explain   : 学习from CommandPattern.PolishRingCommand import PolishRingCommand
from CommandPattern.InlayDiamondCommand import InlayDiamondCommand
from CommandPattern.JewelWorkbench import JewelWorkbench
from CommandPattern.JewelCraftsman import JewelCraftsman
from CommandPattern.CleanNecklaceCommand import CleanNecklaceCommand# -------------------------- 5. 客户端调用示例 --------------------------class CommandBll(object):""""""def demo(self):"""Returns:"""# 1. 创建接收者（珠宝工匠）craftsman = JewelCraftsman()# 2. 创建调用者（珠宝工作台）workbench = JewelWorkbench()# 3. 创建具体命令并执行print("===== 执行第一个命令：抛光铂金戒指 =====")polish_cmd = PolishRingCommand(craftsman, "铂金")workbench.set_command(polish_cmd)workbench.execute_command()print("\n===== 执行第二个命令：给黄金项链镶嵌1克拉钻石 =====")inlay_cmd = InlayDiamondCommand(craftsman, "黄金", "1克拉")workbench.set_command(inlay_cmd)workbench.execute_command()print("\n===== 执行第三个命令：清洗珍珠项链 =====")clean_cmd = CleanNecklaceCommand(craftsman, "珍珠")workbench.set_command(clean_cmd)workbench.execute_command()# 4. 撤销操作print("\n===== 撤销最后一个命令 =====")workbench.undo_last_command()print("\n===== 再次撤销命令 =====")workbench.undo_last_command()

调用：

# encoding: utf-8
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：
# Author    : geovindu,Geovin Du 涂聚文.
# IDE       : PyCharm 2023.1 python 3.11
# OS        : windows 10
# database  : mysql 9.0 sql server 2019, postgreSQL 17.0  oracle 21c Neo4j
# Datetime  : 2026/2/18 20:58
# User      : geovindu
# Product   : PyCharm
# Project   : pydesginpattern
# File      : main.py
# explain   : 学习
from bll.MementoBll import MementoBll
from bll.CommandBll import CommandBll# Press the green button in the gutter to run the script.
if __name__ == '__main__':#实现备忘录模式（Memento Pattern）#mementobll= MementoBll()#mementobll.demo()#命令模式（Command Pattern）commandBll= CommandBll()commandBll.demo()print('PyCharm')

输出：

# encoding: utf-8
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：
# Author    : geovindu,Geovin Du 涂聚文.
# IDE       : PyCharm 2023.1 python 3.11
# OS        : windows 10
# database  : mysql 9.0 sql server 2019, postgreSQL 17.0  oracle 21c Neo4j
# Datetime  : 2026/2/18 20:58
# User      : geovindu
# Product   : PyCharm
# Project   : pydesginpattern
# File      : main.py
# explain   : 学习
from bll.MementoBll import MementoBll
from bll.CommandBll import CommandBllif __name__ == '__main__':#实现备忘录模式（Memento Pattern）#mementobll= MementoBll()#mementobll.demo()#命令模式（Command Pattern）commandBll= CommandBll()commandBll.demo()print('PyCharm')

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