面向对象编程进阶版

isinstance(obj,cls)检查obj是否是类 cls 的实例化对象

issubclass(sub, super)检查sub类是否是 super 类的派生类

# isinstance(obj,cls)检查obj是否是类 cls 的实例化对象

class Foo(object):
    pass

class Foo1(Foo):
    pass

obj = Foo1()
print(isinstance(obj, Foo1))    # True
print(isinstance(obj, Foo))     # True


# issubclass(sub, super)检查sub类是否是 super 类的派生类
class Foo(object):
    pass

class Bar(Foo):
    pass

print(issubclass(Bar, Foo))     # True

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