class="brush:python;gutter:true;">#

encoding:

JewelCraftsman(object):"""珠宝工匠（真正执行具体操作的接收者）"""def

polish_ring(self,

str):"""抛光戒指Args:ring_type:Returns:"""print(f"工匠正在抛光

{ring_type}

str):"""给项链镶嵌钻石Args:necklace:diamond_size:Returns:"""print(f"工匠正在给

{necklace}

str):"""清洗项链Args:necklace:Returns:"""print(f"工匠正在超声波清洗

{necklace}

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

class="brush:python;gutter:true;">#

encoding:

PolishRingCommand(JewelCommand):"""抛光戒指的具体命令"""def

__init__(self,

str):"""Args:craftsman:ring_type:"""#

False

execute(self):"""Returns:"""self.craftsman.polish_ring(self.ring_type)self.executed

Truedef

self.executed:print(f"撤销操作：停止抛光

{self.ring_type}

--------------------------class

InlayDiamondCommand(JewelCommand):"""镶嵌钻石的具体命令"""def

__init__(self,

str):"""Args:craftsman:necklace:diamond_size:"""self.craftsman

Falsedef

execute(self):"""Returns:"""self.craftsman.inlay_diamond(self.necklace,

self.diamond_size)self.executed

Truedef

--------------------------class

CleanNecklaceCommand(JewelCommand):"""清洗项链的具体命令"""def

__init__(self,

str):"""Args:craftsman:necklace:"""self.craftsman

Falsedef

execute(self):"""Returns:"""self.craftsman.clean_necklace(self.necklace)self.executed

Truedef

self.executed:print(f"撤销操作：停止清洗

{self.necklace}

class="brush:python;gutter:true;">#

encoding:

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

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.pop()last_cmd.undo()else:print("没有可撤销的珠宝操作命令❌")

class="brush:python;gutter:true;">#

encoding:

CommandPattern.PolishRingCommand

import

CommandPattern.InlayDiamondCommand

import

CommandPattern.CleanNecklaceCommand

import

--------------------------class

创建接收者（珠宝工匠）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

"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

CleanNecklaceCommand(craftsman,

"珍珠")workbench.set_command(clean_cmd)workbench.execute_command()#

撤销操作print("\n=====

=====")workbench.undo_last_command()print("\n=====

再次撤销命令

=====")workbench.undo_last_command()

class="brush:python;gutter:true;">#

encoding:

MementoBll()#mementobll.demo()#命令模式（Command

Pattern）commandBll=

CommandBll()commandBll.demo()print('PyCharm')

class="brush:python;gutter:true;">#

encoding:

MementoBll()#mementobll.demo()#命令模式（Command

Pattern）commandBll=

CommandBll()commandBll.demo()print('PyCharm')

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