Python中的建造者模式是一種創建復雜對象的設計模式，它允許您將創建對象的過程分解成多個步驟，從而使代碼更加靈活和可維護。以下是一個示例，說明如何在Python中實現建造者模式：

class Computer:
def __init__(self):
self._motherboard = None
self._processor = None
self._memory = None
def set_motherboard(self, motherboard):
self._motherboard = motherboard
def set_processor(self, processor):
self._processor = processor
def set_memory(self, memory):
self._memory = memory
class ComputerBuilder:
def __init__(self):
self._computer = Computer()
def build_motherboard(self):
self._computer.set_motherboard('Motherboard')
return self
def build_processor(self):
self._computer.set_processor('Processor')
return self
def build_memory(self):
self._computer.set_memory('Memory')
return self
def get_computer(self):
return self._computer
class Director:
def __init__(self, builder):
self._builder = builder
def construct(self):
self._builder.build_motherboard().build_processor().build_memory()
builder = ComputerBuilder()
director = Director(builder)
director.construct()
computer = builder.get_computer()
print(f'Motherboard: {computer._motherboard}')
print(f'Processor: {computer._processor}')
print(f'Memory: {computer._memory}')

上述代碼中，首先定義了一個Computer類，用于存儲要建造的對象。接下來定義了一個ComputerBuilder類，通過該類中的方法來構建Computer對象。Director類則用于安排構建步驟。最后，我們創建一個ComputerBuilder對象并將其傳遞給Director對象。將所有的構建步驟提交給Director后，我們可以從ComputerBuilder對象中檢索最終構建的Computer對象。