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This is txpostgres is a library for accessing a PostgreSQL database from the Twisted framework. It builds upon asynchronous features of the Psycopg database library, which in turn exposes the asynchronous features of libpq, the PostgreSQL C library.
It requires a version of Psycopg that includes support for asynchronous connections (versions 2.2.0 and later) and a reasonably recent Twisted (it has been tested with Twisted 10.2 onward). Alternatively, psycopg2-ctypes can be used in lieu of Psycopg.
txpostgres tries to present an interface that will be familiar to users of both Twisted and Psycopg. It features a Cursor wrapper class that mimics the interface of a Psycopg cursor but returns Deferred objects. It also provides a Connection class that is meant to be a drop-in replacement for Twisted's adbapi.Connection with some small differences regarding connection establishing.
The main advantage of txpostgres over Twisted's built-in database support is non-blocking connection building and complete lack of thread usage.
It runs on Python 2.5, 2.6, 2.7 and PyPy.
If you got txpostgres as a source tarball, you can run the automated test suite and install the library with:
tar xjf txpostgres-x.x.x.tar.bz2 cd txpostgres-x.x.x trial test sudo python setup.py install
Alternatively, just install it from PyPI:
pip install txpostgres
The library is distributed under the MIT License, see the LICENSE file for details. You can contact the author, Jan Urbański, at firstname.lastname@example.org. Feel free to download the source, file bugs in the issue tracker and consult the documentation
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