tornado.concurrent — Work with threads and futures tornado.locks – Synchronization primitives tornado.queues – Queues for coroutines tornado.process — Utilities for multiple processes Integration with # Wait for the timer to run out. Queue example - a concurrent web spider Tornado’s tornado.queues module implements an asynchronous producer / consumer pattern for coroutines, analogous to the tornado.locks – Synchronization primitives Condition Event Semaphore BoundedSemaphore Lock tornado.queues – Queues for coroutines Classes Queue PriorityQueue LifoQueue Exceptions QueueEmpty QueueFull

concurrency tornado.gen — Generator-based coroutines tornado.locks – Synchronization primitives tornado.queues – Queues for coroutines tornado.process — Utilities for multiple processes Integration with # Wait for the timer to run out. Queue example - a concurrent web spider Tornado’s tornado.queues module implements an asynchronous producer / consumer pattern for coroutines, analogous to the tornado.locks – Synchronization primitives Condition Event Semaphore BoundedSemaphore Lock tornado.queues – Queues for coroutines Classes Queue PriorityQueue LifoQueue Exceptions QueueEmpty QueueFull

nxt # Wait for the timer to run out. 6.1.4 Queue example - a concurrent web spider Tornado’s tornado.queues module implements an asynchronous producer / consumer pattern for coroutines, anal- ogous to coroutine in line waiting for acquire gets the lock. If not locked, raise a RuntimeError. 6.5.3 tornado.queues – Queues for coroutines New in version 4.2. Asynchronous queues for coroutines. These classes Tornado Documentation, Release 6.1 from tornado import gen from tornado.ioloop import IOLoop from tornado.queues import Queue q = Queue(maxsize=2) async def consumer(): async for item in q: try: print('Doing

nxt # Wait for the timer to run out. 4.1.4 Queue example - a concurrent web spider Tornado’s tornado.queues module implements an asynchronous producer / consumer pattern for coroutines, anal- ogous to coroutine in line waiting for acquire gets the lock. If not locked, raise a RuntimeError. 4.5.4 tornado.queues – Queues for coroutines New in version 4.2. Asynchronous queues for coroutines. Warning: Unlike the queue size is unbounded. from tornado import gen from tornado.ioloop import IOLoop from tornado.queues import Queue q = Queue(maxsize=2) @gen.coroutine def consumer(): while True: item = yield

nxt # Wait for the timer to run out. 5.1.4 Queue example - a concurrent web spider Tornado’s tornado.queues module implements an asynchronous producer / consumer pattern for coroutines, anal- ogous to coroutine in line waiting for acquire gets the lock. If not locked, raise a RuntimeError. 5.5.3 tornado.queues – Queues for coroutines New in version 4.2. Asynchronous queues for coroutines. These classes the queue size is unbounded. from tornado import gen from tornado.ioloop import IOLoop from tornado.queues import Queue q = Queue(maxsize=2) async def consumer(): async for item in q: try: print('Doing

nxt # Wait for the timer to run out. 6.1.4 Queue example - a concurrent web spider Tornado’s tornado.queues module implements an asynchronous producer / consumer pattern for coroutines, anal- ogous to coroutine in line waiting for acquire gets the lock. If not locked, raise a RuntimeError. 6.5.3 tornado.queues – Queues for coroutines New in version 4.2. Asynchronous queues for coroutines. These classes the queue size is unbounded. from tornado import gen from tornado.ioloop import IOLoop from tornado.queues import Queue q = Queue(maxsize=2) async def consumer(): async for item in q: try: print('Doing

concurrency tornado.gen — Generator-based coroutines tornado.locks – Synchronization primitives tornado.queues – Queues for coroutines tornado.process — Utilities for multiple processes Integration with # Wait for the timer to run out. Queue example - a concurrent web spider Tornado’s tornado.queues module (and the very similar Queue classes in asyncio [https://docs.python.org/3/library/asyncio tornado.locks – Synchronization primitives Condition Event Semaphore BoundedSemaphore Lock tornado.queues – Queues for coroutines Classes Queue PriorityQueue LifoQueue Exceptions QueueEmpty QueueFull

nxt # Wait for the timer to run out. 6.1.4 Queue example - a concurrent web spider Tornado’s tornado.queues module (and the very similar Queue classes in asyncio) implements an asynchronous producer / coroutine in line waiting for acquire gets the lock. If not locked, raise a RuntimeError. 6.5.3 tornado.queues – Queues for coroutines New in version 4.2. Asynchronous queues for coroutines. These classes 129 Tornado Documentation, Release 6.4 import asyncio from tornado.ioloop import IOLoop from tornado.queues import Queue q = Queue(maxsize=2) async def consumer(): async for item in q: try: print('Doing

nxt # Wait for the timer to run out. 6.1.4 Queue example - a concurrent web spider Tornado’s tornado.queues module (and the very similar Queue classes in asyncio) implements an asynchronous producer / raise a RuntimeError. 128 Chapter 6. Documentation Tornado Documentation, Release 6.2 6.5.3 tornado.queues – Queues for coroutines New in version 4.2. Asynchronous queues for coroutines. These classes default) the queue size is unbounded. import asyncio from tornado.ioloop import IOLoop from tornado.queues import Queue q = Queue(maxsize=2) async def consumer(): async for item in q: try: print('Doing

nxt # Wait for the timer to run out. 6.1.4 Queue example - a concurrent web spider Tornado’s tornado.queues module (and the very similar Queue classes in asyncio) implements an asynchronous producer / coroutine in line waiting for acquire gets the lock. If not locked, raise a RuntimeError. 6.5.3 tornado.queues – Queues for coroutines New in version 4.2. Asynchronous queues for coroutines. These classes 129 Tornado Documentation, Release 6.4 import asyncio from tornado.ioloop import IOLoop from tornado.queues import Queue q = Queue(maxsize=2) async def consumer(): async for item in q: try: print('Doing