The Hacker's Guide to Python released!

And done! It took me just 8 months to do this entire book project around Python. From the first day I started writing to today, where I finally publish and sell – almost entirely – myself this book. I'm really proud of what I've achieved so far, as this was something totally new to me.

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25 Mar 2014 | Tags: python books

Databases integration testing strategies with Python

The Ceilometer project supports various database backend that can be used as storage. Among them are MongoDB, SQLite MySQL, PostgreSQL, HBase, DB2… All Ceilometer's code is unit tested, but when dealing with external storage services, one cannot be sure that the code is really working. You could be inserting data with an incorrect SQL statement, or in the wrong table. Only having the real database storage running and being used can tell you that.

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06 Jan 2014 | Tags: python ceilometer openstack

Python 3.4 single dispatch, a step into generic functions

I love to say that Python is a nice subset of Lisp, and I discover that it's getting even more true as time passes. Recently, I've stumbled upon the PEP 443 that describes a way to dispatch generic functions, in a way that looks like what CLOS, the Common Lisp Object System, provides.

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17 Sep 2013 | Tags: python lisp

Announcing The Hacker's Guide to Python

I've been hacking on Python for a lot of years now, on various project. For the last two years, I've been heavily involved in OpenStack, which makes an heavy usage of Python.

Once you start working with a hundred of hackers, on several software and libraries representing more than half a million source lines of Python, things change. The scalability, testing and deployment problems inherent to a cloud platform meddle with everything in designing components.

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03 Sep 2013 | Tags: python books

The definitive guide on how to use static, class or abstract methods in Python

Doing code reviews is a great way to discover things that people might struggle to comprehend. While proof-reading OpenStack patches recently, I spotted that people were not using correctly the various decorators Python provides for methods. So here's my attempt at providing me a link to send them to in my next code reviews. :-)

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01 Aug 2013 | Tags: python

Hy, Lisp in Python

I've meant to look at Hy since Paul Tagliamonte started to talk to me about it, but never took a chance until now. Yesterday, Paul indicated it was a good time for me to start looking at it, so I spent a few hours playing.

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03 Apr 2013 | Tags: python hy lisp

OpenStack Swift eventual consistency analysis & bottlenecks

Swift is the software behind the OpenStack Object Storage service.

This service provides a simple storage service for applications using RESTful interfaces, providing maximum data availability and storage capacity.

I explain here how some parts of the storage and replication in Swift works, and show some of its current limitations.

If you don't know Swift and want to read a more "shallow" overview first, you can read John Dickinson's Swift Tech Overview.

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23 Apr 2012 | Tags: openstack swift python

First release of PyMuninCli

Today I release a Python client library to query Munin servers.

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17 Apr 2012 | Tags: python munin

xpyb 1.3 released

It took a while to get it out, but finally, 3 years after the latest release (1.2), the version of 1.3 of xpyb (the XCB Python bindngs) is out.

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22 Mar 2012 | Tags: python xcb xpyb freedesktop x11

Google Calendar notifications using pynotify

I use Google Calendar to manage my calendars, and I really missed something to warn me whenever I have an appointment with an alert set.

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03 Jan 2012 | Tags: python gtk notify googlecalendar gdata

New job, new blog

It has been a while since I blogged but I've been very busy, with my new job and this new blog!

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07 Dec 2011 | Tags: work openstack python debian

Python sets comparisons

This week I lost some time playing with Python's sets.

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17 May 2011 | Tags: python

Python cairo and XCB support

cairo has a Python binding (pycairo) since a long time, and some months ago a Python binding for XCB (xpyb) has been released.

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22 Dec 2009 | Tags: python cairo xcb

Teething troubles

It's not that often that I start something from scratch. It's an amazing feeling to start a new project, to start writing something new. I like that. It's creation, it's an artistic part of our computing stuff. I feel like a code artist.

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20 Dec 2009 | Tags: python cython