thread-safe. The only method in Tornado that is safe to call from other threads is IOLoop.add_callback. You can also use IOLoop.run_in_executor to asynchronously run a blocking function on another thread, but HTTP (HTTPServer and AsyncHTTPClient). • An asynchronous networking library including the classes IOLoop and IOStream, which serve as the building blocks for the HTTP components and can also be used to generally return placeholder objects (Futures), with the exception of some low- level components like the IOLoop that use callbacks. Futures are usually transformed into their result with the await or yield keywords

thread-safe. The only method in Tornado that is safe to call from other threads is IOLoop.add_callback. You can also use IOLoop.run_in_executor to asynchronously run a blocking function on another thread, but tornado.http1connection – HTTP/1.x client/server implementation Asynchronous networking tornado.ioloop — Main event loop tornado.iostream — Convenient wrappers for non-blocking socketstornado.netutil of HTTP (HTTPServer and AsyncHTTPClient). An asynchronous networking library including the classes IOLoop and IOStream, which serve as the building blocks for the HTTP components and can also be used to