5.11-1 内置方法

一 isinstance(obj,cls)和issubclass(sub,super)

isinstance(obj,cls)检查是否obj是否是类 cls 的对象

class Foo(object):
    pass
obj = Foo()
isinstance(obj, Foo)

 

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

class Foo(object):
    pass
class Bar(Foo):
    pass
issubclass(Bar, Foo)