def close(self):
		'''关闭与数据库的连接'''
		if VERBOSE:
			print 'Database connection CLOSE.'
		self.conn.close()
def get_tenant_type(self):
        """
        Get the type of tenant. Will only work for multi type tenants
        :return: str
        """
        return getattr(self, settings.MULTI_TYPE_DATABASE_FIELD)