Python Tornado simple WSGI Application

tornado.py

def application():

    handlers=[

        ## Error handler
        #(r"/", ErrorHandler),

        ######INDEX
        (r'/', indexHandler.IndexHandler),
    ]

    settings=dict()
    return tornado.wsgi.WSGIApplication(handlers, **settings)


app = application()

if __name__ == "__main__":

    # retrieve env config
    PORT = os.getenv('PORT', 8888)
    DIST = os.getenv('DIST', 'prod')
    
    access_log = logging.getLogger("tornado.access")
    app_log = logging.getLogger("tornado.application")
    gen_log = logging.getLogger("tornado.general")

    logging_config = dict(
    version = 1,
    formatters = {
            'f': {'format':
                '%(asctime)s %(name)-12s %(levelname)-8s %(message)s'}
            },
        handlers = {
            'h': {'class': 'logging.StreamHandler',
                'formatter': 'f',
                'level': logging.DEBUG}
            },
        loggers = {
            'tornado.general': {'handlers': ['h'],
                    'level': logging.DEBUG}
            }
    )
    dictConfig(logging_config)

    #enable_pretty_logging()

    http_server = HTTPServer( WSGIContainer(app) )
    http_server.listen(int(PORT))

    logger.info('Http Server listening on Port %s ' % PORT)

    ioloop.IOLoop.instance().start()