类的进阶

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

class Foo:
    def __init__(self,name):
        self.name = name

obj = Foo("egon")

print(isinstance(obj,Foo))


l = list([1,2,3])
print(isinstance(l,list))

-----------------结果-----------

True
True

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