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Many Python developers are unaware of the extent to which you can use functional programming in Python, which is a shame: with few exceptions, functional programming allows you to write more concise and efficient code. Moreover, Python’s support for functional programming is extensive. Here I'd like to talk a bit about how you can actually have a functional approach to programming with our favorit

Packaging Python has been a painful experience for long. The history of the various distribution that Python offered along the years is really bumpy, and both the user and developer experience has been pretty bad. Fortunately, things improved a lot in the recent years, with the reconciliation of setuptools and distribute. Though in the context of the OpenStack project, a solution on top of setupto

Continuing my post series on the tools I use these days in Python, this time I would like to talk about a library I really like, named voluptuous. It's no secret that most of the time, when a program receives data from the outside, it's a big deal to handle it. Indeed, most of the time your program has no guarantee that the stream is valid and that it contains what is expected. The robustness prin

A lot of people read up on good Python practice, and there's plenty of information about that on the Internet. Many tips are included in the book I wrote this year, The Hacker's Guide to Python. Today I'd like to show a concrete case of code that I don't consider being the state of the art. In my last article where I talked about my new project Gnocchi, I wrote about how I tested, hacked and then

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

I've finally published my Emacs configuration. This took me a while, since I had personal information inside (like passwords). Recently, I've been able to move them away and can now publish everything in my Git repository. It's probably not yet usable from scratch, since I didn't include the bootstrap code for el-get. But you can at least lurk and grab some ideas or lines of code. And do not hesit

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