import tornado.web import tornado.ioloop from pymongo import MongoClient import PostServer import QueryDB # Connects to the default host and port on mongodb client = MongoClient() db = client.db query_db = QueryDB.QueryHandler(db) # Maps root URL to MainHandler # and passes db reference app = tornado.web.Application([(r"/", PostServer.MainHandler, dict(db=db))]) loop = tornado.ioloop.IOLoop.instance()