status_code.py

import json


class StatusCodeField(int):
    def __new__(cls, status_code, message):
        obj = int.__new__(cls, status_code)
        obj.message = message
        return obj


class BaseStatusCode(object):
    pass


class UserStatusCode(BaseStatusCode):
    EMAIL_INVALID = StatusCodeField(12345, "Email Invalid")
    PASSWORD_INVALID = StatusCodeField(12346, "Password Invalid")

print(UserStatusCode.EMAIL_INVALID)
print(UserStatusCode.EMAIL_INVALID.message)

response_data = {"status_code": UserStatusCode.EMAIL_INVALID, "message": UserStatusCode.EMAIL_INVALID.message}
response_data_json = json.dumps(response_data, indent=2)
print(response_data_json)