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        "author": "Daniele Varrazzo",
        "author_email": "daniele.varrazzo@gmail.com",
        "bugtrack_url": null,
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            "License :: OSI Approved :: BSD License",
            "Operating System :: OS Independent",
            "Programming Language :: Python :: 2",
            "Programming Language :: Python :: 3",
            "Topic :: Database"
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        "description": "psycogreen -- psycopg2 integration with coroutine libraries\n===========================================================\n\nThe `psycogreen`_ package enables psycopg2 to work with coroutine libraries,\nusing asynchronous calls internally but offering a blocking interface so that\nregular code can run unmodified.\n\n`Psycopg`_ offers `coroutines support`__ since release 2.2. Because the main\nmodule is a C extension it cannot be monkey-patched to become\ncoroutine-friendly. Instead it exposes `a hook`__ that coroutine libraries can\nuse to install a function integrating with their event scheduler. Psycopg will\ncall the function whenever it executes a libpq call that may block.\n`psycogreen` is a collection of \"wait callbacks\" useful to integrate Psycopg\nwith different coroutine libraries.\n\n.. _psycogreen: https://bitbucket.org/dvarrazzo/psycogreen\n.. _Psycopg: http://initd.org/psycopg/\n.. __: http://initd.org/psycopg/docs/advanced.html#support-to-coroutine-libraries\n.. __: http://initd.org/psycopg/docs/extensions.html#psycopg2.extensions.set_wait_callback\n\n\nModule ``psycogreen.eventlet``\n------------------------------\n\n`Eventlet`_ currently supports Psycopg out-of-the-box and ``psycogreen`` is not\nnecessary. See `the documentation`__ for patching instruction.\n\n.. _Eventlet: http://eventlet.net/\n.. __: http://eventlet.net/doc/patching.html#monkeypatching-the-standard-library\n\nIf for any reason you want to avoid using Eventlet monkeypatching you can use\n``psycogreen.eventlet.patch_psycopg()``.\n\nFunction ``psycogreen.eventlet.patch_psycopg()``\n    Enable async processing in Psycopg integrated with the Eventlet events\n    loop.  It is performed by registering ``eventlet_wait_callback()`` as\n    psycopg2 wait callback.\n\nFunction ``psycogreen.eventlet.eventlet_wait_callback(conn)``\n    A wait callback integrating with Eventlet events loop.\n\nAn example script showing concurrent usage of ``psycopg2`` with ``urlopen()``\nwith Eventlet is available in |tests/test_eventlet.py|__.\n\n.. |tests/test_eventlet.py| replace:: ``tests/test_eventlet.py``\n.. __: https://bitbucket.org/dvarrazzo/psycogreen/src/master/tests/test_eventlet.py\n\n\nModule ``psycogreen.gevent``\n----------------------------\n\nIn order to use psycopg2 asynchronously with `gevent`_ you can use\n``psycogreen.gevent.patch_psycopg()``.\n\nFunction ``psycogreen.gevent.patch_psycopg()``\n    Enable async processing in Psycopg integrated with the gevent events\n    loop.  It is performed by registering ``gevent_wait_callback()`` as\n    psycopg2 wait callback.\n\nFunction ``psycogreen.gevent.gevent_wait_callback(conn)``\n    A wait callback integrating with gevent events loop.\n\nAn example script showing concurrent usage of ``psycopg2`` with ``urlopen()``\nwith gevent is available in |tests/test_gevent.py|__.\n\n.. _gevent: http://www.gevent.org/\n.. |tests/test_gevent.py| replace:: ``tests/test_gevent.py``\n.. __: https://bitbucket.org/dvarrazzo/psycogreen/src/master/tests/test_gevent.py\n\n\nuWSGI green threads\n-------------------\n\nRoberto De Ioris is writing uGreen__, a green thread implementation on top of\nthe `uWSGI async platform`__.\n\n.. __: http://projects.unbit.it/uwsgi/wiki/uGreen\n.. __: http://projects.unbit.it/uwsgi/\n\nHe has performed some tests using both `psycopg2 async support`__ and\n`psycopg2 green support`__ and has reported no problem in their stress tests\nwith both the async styles.\n\n.. __: http://projects.unbit.it/uwsgi/browser/tests/psycopg2_green.py\n.. __: http://projects.unbit.it/uwsgi/browser/tests/psycogreen_green.py",
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