Python config class for different environment

config.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os
from os import getenv

basedir = os.path.abspath(os.path.dirname(__file__))


class Config(object):
    DEBUG = False
    TESTING = False
    MYSQL_HOST = getenv('MYSQL_HOST', '192.168.1.1')

    # get attribute
    def __getitem__(self, key):
        return self.__getattribute__(key)


class ProductionConfig(Config):
    DEBUG = False
    MSSQL_HOST = getenv('MSSQL_HOST', '192.168.8.8')


class DevelopmentConfig(Config):
    DEBUG = True
    MSSQL_HOST = getenv('MSSQL_HOST', '192.168.4.4')


class TestingConfig(Config):
    TESTING = True


mapping = {
    'development': DevelopmentConfig,
    'testing': TestingConfig,
    'production': ProductionConfig,
    'default': DevelopmentConfig
}

APP_ENV = os.environ.get('APP_ENV', 'default').lower()
config = mapping[APP_ENV]()