python适配器模式

class A:
    def cost(self):
        print('cost a')
​
​
class B:
    def cost(self):
        print('cost b')
​
​
class MyAdapter:
​
    def __init__(self, obj):
        self.obj = obj
​
    def pay(self):
        self.obj.cost()
​
​
adt_a = MyAdapter(A())
adt_a.pay()
​
adt_b = MyAdapter(B())
adt_b.pay()
​