Asynchronous networking Asynchronous networking Asynchronous networking Asynchronous networking tornado.ioloop — Main event loop IOLoop objects Running an IOLoop I/O events Callbacks and timeouts tornado.iostream — Convenient wrappers for non-blocking sockets Base class Main interface Methods for subclasses Implementations Exceptions tornado.netutil — Miscellaneous network utilities tornado.tcpclient — IOStream connection factory tornado.tcpserver — Basic IOStream-based TCP server