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PostgreSQL database adapter for the Python programming language
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Daniele Varrazzo 58d048198f Close the connection on error in callback 
Unfortunately PQcancel blocks, so it's not better than PQgetResult.
It has been suggested to use PQreset in non-blocking way but this would give
the Python program the burden of handling a connection done but not configured
in an unexpected place.
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README 

psycopg2 - Python-PostgreSQL Database Adapter
********************************************

psycopg2 is a PostgreSQL database adapter for the Python programming
language.  psycopg2 was written with the aim of being very small and fast,
and stable as a rock.

psycopg2 is different from the other database adapter because it was
designed for heavily multi-threaded applications that create and destroy
lots of cursors and make a conspicuous number of concurrent INSERTs or
UPDATEs. psycopg2 also provides full asynchronous operations and support
for coroutine libraries.

psycopg2 can compile and run on Linux, FreeBSD, Solaris, MacOS X and
Windows architecture. It supports Python versions from 2.4 onwards and
PostgreSQL versions from 7.4 onwards.

psycopg2 is free software ("free as in freedom" but I like beer too.)
It is licensed under the GNU Lesser General Public License, version 3 or
later plus an exception to allow OpenSSL (libpq) linking; see LICENSE for
more details.

Documentation
-------------

Start by reading the INSTALL file. More information about psycopg2 extensions
to the DBAPI-2.0 is available in the files located in the doc/ direcory.
Example code can be found in the examples/ directory. If you make any changes
to the code make sure to run the unit tests localed in tests/.

Online documentation can be found at: http://initd.org/psycopg/

If you stumble upon any bugs, please tell us at: http://psycopg.lighthouseapp.com/

Contributors
------------

For a list of contributors to the project, see the AUTHORS file.