json_serialize_deserialize

json_string = '{"first_name": "Ian", "second_name":"Leatherbury"}'

class User(object):

    def __init__(self, first_name, second_name):
        self.first = first_name
        self.second = second_name

# Deserialize
j = json.loads(json_string)

# Instantiate with **kwargs
u = User(**j)

print("Second Name: " + u.first)
# prints: Second Name: Ian

# Serialize 
ob = json.dumps(u, default=lambda o: o.__dict__)

print("Ob: " + ob)
# Ob: {"first": "Ian", "second": "Leatherbury"}