7、python设计模式之策略模式

class Tom:

def run(self):
print('Tom is running...')

class Jerry:

def run(self):
print(self.__class__.__name__ + ' is running...')

# 定义一个类，该类的一个方法可以调用另一个类的方法
class RunOfAnimal:

def set_run(self, cls):
self.runable = cls()

def run(self):
self.runable.run()

# 测试
if __name__ == '__main__':
ra = RunOfAnimal()

ra.set_run(Tom)
ra.run() # Tom is running...

ra.set_run(Jerry)
ra.run()  # Jerry is running...