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    <p><a href="http://www.gevent.org" rel="nofollow noreferrer">gevent</a> is <a href="http://blog.gevent.org/2010/02/27/why-gevent/" rel="nofollow noreferrer">eventlet cleaned up</a>.</p> <p>API-wise it follows the same conventions as the standard library (in particular, threading and multiprocessing modules) where it makes sense. So you have familiar things like <a href="http://www.gevent.org/gevent.queue.html" rel="nofollow noreferrer">Queue</a> and <a href="http://www.gevent.org/gevent.event.html#gevent.event.Event" rel="nofollow noreferrer">Event</a> to work with.</p> <p>It only supports <a href="http://www.monkey.org/~provos/libevent/" rel="nofollow noreferrer">libevent</a> (<strong>update:</strong> <a href="http://blog.gevent.org/2011/04/28/libev-and-libevent/" rel="nofollow noreferrer">libev since 1.0</a>) as reactor implementation but takes full advantage of it, featuring a fast WSGI server based on libevent-http and resolving DNS queries through libevent-dns as opposed to using a thread pool like most other libraries do. (<strong>update:</strong> since 1.0 c-ares is used to make async DNS queries; threadpool is also an option.)</p> <p>Like eventlet, it makes the callbacks and Deferreds unnecessary by using <a href="http://codespeak.net/py/0.9.2/greenlet.html" rel="nofollow noreferrer">greenlets</a>.</p> <p>Check out the examples: <a href="https://github.com/gevent/gevent/blob/master/examples/concurrent_download.py" rel="nofollow noreferrer">concurrent download of multiple urls</a>, <a href="http://blog.gevent.org/2009/10/10/simpler-long-polling-with-django-and-gevent/" rel="nofollow noreferrer">long polling webchat</a>.</p>
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    1. POA clean, lightweight alternative to Python's twisted?
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    1. USDenis Bilenko
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    1. COI'll second gevent -- After reviewing many of the solutions, gevent worked very well for me. It allowed me to retain the better part of my existing program, and the changes that were required were trivial -- Best of all, if the code needs to be maintained in 3, 4, 5, ... years time, it still makes sense to anyone not familiar with gevent, the biggest showstopper for Twisted is the strong learning curve, this causes problems not just when implementing, but also further down the line during maintenance...
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      1. USMartin Tournoij
 

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