PyMOTW-3asyncio — Asynchronous I/O, event loop, and concurrency tools¶
| Purpose: | An asynchronous I/O and concurrency framework. |
|---|
The asyncio module provides tools for building concurrent
applications using coroutines. While the threading module
implements concurrency through application threads and
multiprocessing implements concurrency using system processes,
asyncio uses a single-threaded, single-process approach in
which parts of an application cooperate to switch tasks explicitly at
optimal times. Most often this context switching occurs when the
program would otherwise block waiting to read or write data, but
asyncio also includes support for scheduling code to run at a
specific future time, to enable one coroutine to wait for another to
complete, for handling system signals, and for recognizing other
events that may be reasons for an application to change what it is
working on.
- Asynchronous Concurrency Concepts
- Cooperative Multitasking with Coroutines
- Scheduling Calls to Regular Functions
- Producing Results Asynchronously
- Executing Tasks Concurrently
- Composing Coroutines with Control Structures
- Synchronization Primitives
- Asynchronous I/O with Protocol Class Abstractions
- Asynchronous I/O Using Coroutines and Streams
- Using SSL
- Interacting with Domain Name Services
- Working with Subprocesses
- Receiving Unix Signals
- Combining Coroutines with Threads and Processes
- Debugging with asyncio
Note
In Python 3.5, asyncio is still a provisional module. The API
was stablized in Python 3.6, and most of the changes were
backported to later patch releases of Python 3.5. As a result, the
module may work slightly differently under different versions of
Python 3.5.
See also
- Standard library documentation for asyncio
- PEP 3156 – Asynchronous IO Support Rebooted: the “asyncio” Module
- PEP 380 – Syntax for Delegating to a Subgenerator
- PEP 492 – Coroutines with async and await syntax
concurrent.futures– Manage Pools of Concurrent Taskssocket– Low-level network communicationselect– Low-level asynchronous I/O toolssocketserver– Framework for creating network servers- asyncio: What’s New in Python 3.6 –
Summary of the changes to
asyncioas the API stablized in Python 3.6. - trollius – A port of Tulip, the original version of asyncio, to Python 2.
- The New asyncio Module in Python 3.4: Event Loops – Article by Gastón Hillar in Dr. Dobb’s
- Exploring Python 3’s Asyncio by Example – Blog post by Chat Lung
- A Web Crawler With asyncio Coroutines – An article in The Architecture of Open Source Applications by A. Jesse Jiryu Davis and Guido van Rossum
- Playing with asyncio – blog post by Nathan Hoad
- Async I/O and Python – blog post by Mark McLoughlin
- A Curious Course on Coroutines and Concurrency – PyCon 2009 tutorial by David Beazley
- How the heck does async/await work in Python 3.5? – blog post by Brett Cannon
- Unix Network Programming, Volume 1: The Sockets Networking API, 3/E By W. Richard Stevens, Bill Fenner, and Andrew M. Rudoff. Published by Addison-Wesley Professional, 2004. ISBN-10: 0131411551
- Foundations of Python Network Programminng, 3/E By Brandon Rhodes and John Goerzen. Published by Apress, 2014. ISBN-10: 1430258543
