class Test_Demo:

     TEST = 'test_value'

     def __init__(self,name,age):

         self.name = name

         self.age = age

     #static method

     @staticmethod

     def test_static():

         return Test_Demo.TEST

     #特性

     @property

     def test_property(self):

         return self.name+':'+str(self.age)

     #类方法

     @classmethod

     def test_class(self):

         return self.TEST

 if __name__ == '__main__':

     test_demo = Test_Demo('zj',)

     #print(test_demo.name)

     print(Test_Demo.test_static())

     print(test_demo.test_property)

     print(test_demo.test_class())