python必备内置函数- isinstance(object, classinfo)

补充楼下：

isinstance()

如果类有多继随的情况下，isinstance会认为，子类为父类型，这与type明显示的区别所在。

判断object是否为类classinfo的实例，是返回true

In [20]: class Student():
    ...:     ...:     def __init__(self,id,name):
    ...:     ...:         self.id = id
    ...:     ...:         self.name = name
    ...:     ...:     def __repr__(self):
    ...:     ...:         return 'id = '+self.id +', name = '+self.name
    ...:

In [21]: xiaoming = Student('001','xiaoming')

In [22]: isinstance(xiaoming,Student)
Out[22]: True