#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import json
class Student(object):
	def __init__(self,name,age,score):
		self.name=name
		self.age=age
		self.score=score
		
		
def student2dict(std):
	return{
	'name': std.name,
	'age':  std.age,
	'score': std.score
	}


s=Student('Bob',20,88)
print(json.dumps(s,default=student2dict))