Popular recipes tagged "asynchronous"

AsyncGetter (Python)

2013-06-01T18:20:15-07:00

Python recipe 578540 by Nick Faro (asynchronous, getting).

You specify it a 'get' function and it runs a thread and gets it for you. Incredibly simple.

Run async code inline, nonblocking (Python)

2011-11-23T10:13:31-08:00

Python recipe 577959 by PRITAM K (asynchronous, closure, decorator, generator, threads).

A decorator, that makes it easy to switch between the mainthread and background threads.

asyncore scheduler (Python)

2011-07-25T23:42:21-07:00

Python recipe 577808 by Giampaolo Rodolà (asynchronous, asyncore, heapq, nonblocking, scheduler, twisted). Revision 5.

The thing I miss mostly in asyncore is a system for calling a function after a certain amount of time without blocking. This is crucial for simple tasks such as disconnecting a peer after a certain time of inactivity or more advanced use cases such as bandwidth throttling.

This recipe was initially inspired by Twisted's internet.base.DelayedCall class:

http://twistedmatrix.com/trac/browser/tags/last_vfs_and_web2/twisted/internet/base.py#L34

...then included into pyftpdlib:

http://code.google.com/p/pyftpdlib/issues/detail?id=72

...and finally proposed for inclusion into asyncore:

http://bugs.python.org/issue1641

Timeout Any Function (Python)

2010-02-04T17:36:31-08:00

Python recipe 577028 by Stephen Chappell (asynchronous, generic, process, timeout, universal_code). Revision 6.

This recipe uses the multiprocessing module to kill functions that have run longer than intended. Unlike other recipes that use threading, this code is designed to actually kill execution that has continued for too long. This implementation does not rely on signals or anything that is OS specific, so it should work on any system on which you might need generic timeouts.

Asynchronous subprocess using asyncore (Python)

2013-01-21T19:51:00-08:00

Python recipe 576957 by Glenn Eychaner (async, asynchronous, asyncore, coroutine, decorator, generator, ipc, subprocess). Revision 21.

A coroutine-based wrapper for subprocess.Popen that uses asyncore to communicate with child processes asynchronously. This allows subprocesses to be called from within socket servers or clients without needing a complicated event loop to check both. Uses recipe 576965 to provide the asynchronous coroutine framework, recipe 576967 to provide asynchronous pipes, and recipe 577600 to provide multiple alarms.

Run async code inline, nonblocking (Python)

2009-11-11T12:55:01-08:00

Python recipe 576952 by Thomas Ahle (asynchronous, closure, decorator, generator, threads). Revision 7.

A decorator, that makes it easy to switch between the mainthread and background threads.

Multicontext (e.g. asynchronous) inline execution framework using coroutines (Python)

2012-12-06T19:32:20-08:00

Python recipe 576965 by Glenn Eychaner (asynchronous, coroutine, decorator, generator, inline, nonblocking, pattern, thread). Revision 14.

A framework for executing inline code, contained in a generator, across multiple execution contexts, by pairing it with an executor that handles the context switching at each yield. An example of a generator which executes some iterations synchronously and some asynchronously is provided. The framework is general enough to be applied to many different coroutine situations.

Subprocess with async I/O pipes class (Python)

2009-05-17T02:02:04-07:00

Python recipe 576759 by Mike Kazantsev (asynchronous, ipc, non_blocking_i_o, pipe, subprocess). Revision 2.

Just stumbled upon the need to move data chunks between subprocesses in a non-linear way with some logic in-between, so tee(1) and fifo(7)'s weren't too good option. Inspired by 440554, but rewritten from scratch to remove unnecessary delays due to sleep(3) calls and suboptimal try/sleep-based polling.