如何在儿童课堂中实施和注入策略

您可以改为使用策略类,将策略函数注入其中:

import abc

def strategy1(self):
    print("strategy1")

class AbstractClient(metaclass=abc.ABCMeta):
    @abc.abstractmethod
    def execute(self):
        pass

class StrategizedClient(AbstractClient):
    execute = strategy1

class PlanlessClient(AbstractClient):
    pass

这需要python3,但它将强制您的子类注入一种策略:

>>> StrategizedClient()
<strategy.StrategizedClient object at 0x10fd594a8>
>>> PlanlessClient()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Can't instantiate abstract class PlanlessClient with abstract methods execute