I0Stream-based TCP server ## • Coroutines and concurrency tornado.gen — Simplify asynchronous code ○ tornado.concurrent — Work with threads and futures ☐ tornado.locks – Synchronization primitives tornado.queues fetch(url, callback=handle_response) And again with a Future instead of a callback: from tornado.concurrent import Future def async_fetch_future(url): http_client =AsyncHTTPClient() my_future tornado.gen — Simplify asynchronous code Decorators Utility functions Legacy interface • tornado.concurrent — Work with threads and futures Consumer methods o Producer methods • tornado.locks – Synchronization

Coroutines are a little magical, but what they do internally is something like this: from tornado.concurrent import Future def async_fetch_manual(url): http_client =AsyncHTTPClient() my_future errors that would otherwise prevent the script from reaching its call to wait. ##### 6.7.2 tornado.concurrent — Work with Future objects Utilities for working with Future objects. Tornado previously --until-success re-runs the program on any failure but stops after the first successful run. ### tornado.concurrent • Fixed reference cycles that could lead to increased memory usage. ### tornado.escape •

Coroutines are a little magical, but what they do internally is something like this: from tornado.concurrent import Future def async_fetch_manual(url): http_client =AsyncHTTPClient() my_future errors that would otherwise prevent the script from reaching its call to wait. ##### 6.7.2 tornado.concurrent — Work with Future objects Utilities for working with Future objects. Tornado previously --until-success re-runs the program on any failure but stops after the first successful run. ### tornado.concurrent • Fixed reference cycles that could lead to increased memory usage. ### tornado.escape •

Coroutines are a little magical, but what they do internally is something like this: from tornado.concurrent import Future def async_fetch_manual(url): http_client =AsyncHTTPClient() my_future errors that would otherwise prevent the script from reaching its call to wait. ##### 6.7.2 tornado.concurrent — Work with Future objects Utilities for working with Future objects. Tornado previously --until-success re-runs the program on any failure but stops after the first successful run. ### tornado.concurrent • Fixed reference cycles that could lead to increased memory usage. ### tornado.escape •

Coroutines are a little magical, but what they do internally is something like this: from tornado.concurrent import Future def async_fetch_manual(url): http_client =AsyncHTTPClient() my_future errors that would otherwise prevent the script from reaching its call to wait. ##### 6.7.2 tornado.concurrent — Work with Future objects Utilities for working with Future objects. Tornado previously OAuthMixin.__oauth_get_user method has been removed. Override _oauth_get_user_future instead. ### tornado.concurrent • The callback argument to run_on_executor has been removed. • return future has been removed

Coroutines are a little magical, but what they do internally is something like this: from tornado.concurrent import Future def async_fetch_manual(url): http_client =AsyncHTTPClient() my_future errors that would otherwise prevent the script from reaching its call to wait. ##### 6.7.2 tornado.concurrent — Work with Future objects Utilities for working with Future objects. Tornado previously OAuthMixin._oauth_get_user method has been removed. Override _oauth_get_user_future instead. ### tornado.concurrent • The callback argument to run_on_executor has been removed. • return future has been removed

## • Utilities - tornado.autoreload — Automatically detect code changes in development • tornado.concurrent — Work with Future objects ☐ tornado.log — Logging support ☐ tornado.options — Command-line Coroutines are a little magical, but what they do internally is something like this: from tornado.concurrent import Future def async_fetch_manual(url): http_client =AsyncHTTPClient() my_future 0. ## Utilities • tornado.autoreload — Automatically detect code changes in development • tornado.concurrent — Work with Future objects • tornado.log — Logging support • tornado.options — Command-line

Coroutines are a little magical, but what they do internally is something like this: from tornado.concurrent import Future def async_fetch_manual(url): http_client =AsyncHTTPClient() my_future errors that would otherwise prevent the script from reaching its call to wait. ##### 6.7.2 tornado.concurrent — Work with Future objects Utilities for working with Future objects. Tornado previously OAuthMixin.__oauth_get_user method has been removed. Override _oauth_get_user_future instead. ### tornado.concurrent • The callback argument to run_on_executor has been removed. • return future has been removed

Coroutines are a little magical, but what they do internally is something like this: from tornado.concurrent import Future def async_fetch_manual(url): http_client =AsyncHTTPClient() my_future errors that would otherwise prevent the script from reaching its call to wait. ##### 6.7.2 tornado.concurrent — Work with Future objects Utilities for working with Future objects. Tornado previously OAuthMixin._oauth_get_user method has been removed. Override _oauth_get_user_future instead. ### tornado.concurrent • The callback argument to run_on_executor has been removed. • return future has been removed

body) Coroutines are a little magical, but what they do internally is something like this: from tornado.concurrent import Future def async_fetch_manual(url): http_client = AsyncHTTPClient() my_future = Future() its call to wait. 148 Chapter 6. Documentation Tornado Documentation, Release 6.5.1 6.7.2 tornado.concurrent — Work with Future objects Utilities for working with Future objects. Tornado previously provided --until-success re-runs the program on any failure but stops after the first successful run. tornado.concurrent • Fixed reference cycles that could lead to increased memory usage. tornado.escape • Several