type动态创建类

在一些特定场合，需要动态创建类，比如创建表单，就会用到type动态创建类，举个例子：

 class Person(object):

     def __init__(self,name,age):
         self.name = name
         self.age = age

 p = Person("aiden",22)
 print(type(p))
 print(type(Person))

 def __init__(self,name,age):
     self.name = name
     self.age = age

 dog_class = type("Dog",(object,),{"role":"dog","__init__":__init__})   #动态添加属性与方法
 print(dog_class)

 d = dog_class('mjj',22)
 print(d.role,d.name,d.age)