Lazy DB Connection in Python

lazy_db_connection.py

import dictmysql  # or whatever db library

class LazyConnector:
    def __init__(self, *args, **kwargs):
        self.__dict__['__factory'] = dictmysql.DictMySQL
        self.__dict__['__con'] = None
        self.__dict__['__args'] = args
        self.__dict__['__kwargs'] = kwargs

    def _add_conn(self):
        """
        When getting or setting every attribute, check the connection and build one if it doesn't exist
        """
        if self.__dict__.get('__con') is None:
            self.__dict__['__con'] = self.__dict__['__factory'](*self.__dict__['__args'], **self.__dict__['__kwargs'])

    def __getattr__(self, item):
        self._add_conn()
        return getattr(self.__dict__['__con'], item)

    def __setattr__(self, key, value):
        self._add_conn()
        setattr(self.__dict__['__con'], key, value)

    def close(self):
        if self.__dict__.get('__con') is not None:
            self.__dict__['__con'].close()
            self.__dict__['__con'] = None
    
# Initialize the connector without making connection to db
conn = LazyConnector(**{'host': 'host', 'user': 'user', 'passwd': 'passwd', 'db': 'db'})
    
# Build connection when calling
conn.query("SELECT NOW();")