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python Programming Glossary: concurrenthttp://stackoverflow.com/questions/1190206/threading-in-python As mentioned by Juergen Python threads cannot actually concurrently access state in the interpreter there's one big lock the infamous.. writing to disk and so on but not at all useful for doing concurrent computation. Use the multiprocessing module In the simple use..
Threading in python doesn't happen parallel http://stackoverflow.com/questions/14592531/threading-in-python-doesnt-happen-parallel as e return url None e pool Pool 20 # limit number of concurrent connections for url result error in pool.imap_unordered get_url..
HDF5 and SQLite. Concurrency, compression & I/O performance [closed] http://stackoverflow.com/questions/16628329/hdf5-and-sqlite-concurrency-compression-i-o-performance brings me to the following questions Does HDF5 support concurrent write access Concurrency considerations aside how does HDF5..
A clean, lightweight alternative to Python's twisted? http://stackoverflow.com/questions/1824418/a-clean-lightweight-alternative-to-pythons-twisted ago I wrote a web spider that I multithreaded to enable concurrent requests to occur at the same time. That was in my Python youth..
How are exceptions implemented under the hood? http://stackoverflow.com/questions/1995734/how-are-exceptions-implemented-under-the-hood exceptions using Goroutines something like a mixture of concurrent coroutines ans CSP processes . Yet another example is Haskell..
embedding short python scripts inside a bash script http://stackoverflow.com/questions/2189098/embedding-short-python-scripts-inside-a-bash-script
How to implement an efficient infinite generator of prime numbers in Python? http://stackoverflow.com/questions/2211990/how-to-implement-an-efficient-infinite-generator-of-prime-numbers-in-python as the frequency of prime numbers formula I prefer non concurrent approach. Thank you for reading and writing python generator..
Are Python built-in containers thread-safe? http://stackoverflow.com/questions/2227169/are-python-built-in-containers-thread-safe about reading from the variables that won't be modified ie concurrent reads are ok so immutable types frozenset tuple str are probably..
Solving embarassingly parallel problems using Python multiprocessing http://stackoverflow.com/questions/2359253/solving-embarassingly-parallel-problems-using-python-multiprocessing and write them out. This seems a most basic pattern in concurrent programming but I am still lost in trying to solve it so let's.. change the algorithm in any way e.g. not run any processes concurrently with I O python concurrency multiprocessing embarrassingly..
What is the fastest way to send 100,000 HTTP requests in Python? http://stackoverflow.com/questions/2632520/what-is-the-fastest-way-to-send-100-000-http-requests-in-python tasks in Python as fast as possible I suppose that means 'concurrently'. Thank you Igor python http concurrency share improve.. import Thread import httplib sys from Queue import Queue concurrent 200 def doWork while True url q.get status url getStatus url.. doSomethingWithResult status url print status url q Queue concurrent 2 for i in range concurrent t Thread target doWork t.daemon..
Create directory if it doesn't exist for file write http://stackoverflow.com/questions/273192/create-directory-if-it-doesnt-exist-for-file-write be fooled. Depending on the application the danger of concurrent operations may be more or less than the danger posed by other..
Can Python's unittest test in parallel, like nose can? http://stackoverflow.com/questions/4710142/can-pythons-unittest-test-in-parallel-like-nose-can dependencies run faster. The performance gain comes from concurrent I O waits when they are accessing different devices better use..
Problem with multi threaded Python app and socket connections http://stackoverflow.com/questions/4783735/problem-with-multi-threaded-python-app-and-socket-connections I try putting in a sleep 1 or limiting the number of concurrent threads I don't seem to able to check more than 1 host every.. info spawning jobs pool Pool 20 # limit number of concurrent connections start timer for _ in pool.imap connect hosts_list..
Scrapy - how to manage cookies/sessions http://stackoverflow.com/questions/4981440/scrapy-how-to-manage-cookies-sessions with future requests I assume I have to disable multiple concurrent requests.. otherwise one spider would be making multiple searches..
Are urllib2 and httplib thread safe? http://stackoverflow.com/questions/5825151/are-urllib2-and-httplib-thread-safe _opener opener There is an obvious race condition when concurrent threads call install_opener and urlopen . Also note that calling.. the source for OpenerDirector.open so it is not safe to concurrently call urlopen with a shared Request object. All told urlopen..
Choosing and deploying a comet server http://stackoverflow.com/questions/621802/choosing-and-deploying-a-comet-server work done on top of it at Divmod. They can handle far more concurrent connections than traditional thread or process based servers..
Using Python's Multiprocessing module to execute simultaneous and separate SEAWAT/MODFLOW model runs http://stackoverflow.com/questions/9874042/using-pythons-multiprocessing-module-to-execute-simultaneous-and-separate-seawa 7 machine. I'd like to run 7 instances of the model concurrently to decrease my total run time approx. 9.5 min per model run.. more manageable theoretically all 8 files should be run concurrently however the behavior continues where they are spawn and immediately.. script exits. EDIT 3 26 2012 16 24 EST SEAWAT does allow concurrent execution as I've done this in the past spawning instances manually..
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