面试题之改变对象的类

class A(object):
    def show(self):
        print('base show')


class B(A):
    def show(self):
        print('derived show')


obj = B()
obj.show()

问题：请问如何修改以上代码，使得以上的代码调用类A的show方法？

class A(object):
    title = 'This is A object'

    def show(self):
        print('base show')


class B(A):
    def show(self):
        print('derived show')


obj = B()
obj.__class__ = A  # 指定obj的class类为A
obj.show()   # base show
print(obj.__class__)  # <class '__main__.A'>
print(obj.title)  # This is A object

# 拓展
# 把obj的__class__改为A之后可以就可以调用类A的所有属性和方法

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转载于:https://www.cnblogs.com/zzliu/p/10555485.html