Change the object preview into one of its own attributes

Question

How to change object printing preview into desirable name ?

class Person:
    def __init___(self):
       self.name = name 
       self.age = age

man1 = Person("Jhon",32)
print(man1)
>>> <__main__.Person object at 0x7f9780554b80>

I need to change the preview of object into specifice attribute .(e.g: obj.name , in this example i want the preview will be "Jhon_Person_obj" instead the adress of it)

This code describe the printing reasult i need.

print(Jhon_Person_obj)
print(Jhon_Person_obj.age)
>>> <__main__.Personobject at 0x7f9780554bb0>
>>> 32