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So, EuroPython 2011 came and went, and it was great fun. I'll try to write down some impressions before I forget them entirely. UPDATE: I finally got to publish this more than a year after it has been written. I won't even bother to read it much.

July 2, 2011, 3:51 p.m. More (835 words) 0 comments Feed

I'll be giving a 4 hour long Twisted training in 3 days. Now is the time to give me input on what things you'd think it's interesting to show.

June 17, 2011, 1:31 a.m. More (128 words) 3 comments Feed

The Python Greece community is shaping up nicely - a meetup will be held on Wednesday, 8th June, at 20:00, at the Nixon. State your interest at the Lanyrd page!

June 1, 2011, 10:30 a.m. More (63 words) 0 comments Feed

After reading my William Reade's post about a small path library he wrote to tame a build script, I thought I'd share a cool trick that has helped me greatly in the current project - the promise pattern.

March 4, 2010, 10:14 a.m. More (410 words) 4 comments Feed

OH: "async won't take hold until it sucks less." It cannot suck less because we are writing async code in languages designed to be procedural, given that you read them top-to-bottom.

February 19, 2010, 10:51 p.m. More (241 words) 7 comments Feed

The results of the 2nd PyAthens meeting: 17 participants, 8 presentations, souvlaki & beer ending, what's not to like?

November 11, 2009, 11:39 a.m. More (366 words) 0 comments Feed

I haven't been surprised by Python in a long time, but today I got surprised by lambdas and how do they capture their surrounding state.

November 9, 2009, 12:32 p.m. More (184 words) 7 comments Feed

Announcing the second meeting of the Athens Python User Group. Wednesday 21 October 2009, 19:00. Read on for details.

October 8, 2009, 2:20 p.m. More (109 words) 3 comments Feed

At my current gig we need to expand the team. We're looking for good all-round Python developers, who are comfortable with learning new technologies. Read on for more details.

October 7, 2009, 5:05 p.m. More (402 words) 3 comments Feed

After a long IRC chat with the kind Twisted folks on IRC, I am writing here a post that could easily serve as an overview page of twisted.mail.smtp. In my opinion, Twisted sorely lacks overview pages, with real words and not just links to examples. It also needs some Google love, so I hope this page will help others looking how to send emails with Twisted.

September 26, 2009, 1:32 p.m. More (454 words) 3 comments Feed

In the spirit of the wonderful "Twisted web in 60 seconds" posts, I'm going to contribute here a small post about the Twisted reactor and Deferreds.

September 25, 2009, 10:59 a.m. More (578 words) 2 comments Feed

The Athens Python User Group had its first meeting on 9/9, at the Eleftheroudakis bookstore Café. This is a post describing what happened and what are the next steps.

September 21, 2009, 2:31 p.m. More (262 words) 2 comments Feed

I recently signed up to stdlib-sig so I could just nod in agreement to the people that suggested that the stdlib needs to evolve. In the discussions that ensued, the backwards compatibility argument came up often. I think it's not a valid argument for the specific discussion, though. Here are my thoughts.

September 16, 2009, 4:50 p.m. More (1416 words) 10 comments Feed

We have a venue for the first meeting of the Athens Python User Group: See you at the Eleftheroudakis Bookstore café, Panepistimiou 17, 6th floor, on Wednesday 9 September, 7.00pm.

September 4, 2009, 7:16 p.m. More (72 words) 1 comment Feed

This is an announcement for the just-created Athens Python User Group. The 1st meeting will take place on Wednesday 9 September, 7:00 pm. Venue: Eleftheroudakis Bookstore café, Panepistimiou 17, 6th floor!

September 1, 2009, 9:19 p.m. More (150 words) 20 comments Feed

EuroPython is over, so it's time for me to write down my thoughts and impressions! Read on.

July 3, 2009, 5:58 p.m. More (1028 words) 0 comments Feed

My employer is looking for an excellent Pythonista to fill a contracting position, part-time or full-time. Read inside for more information.

June 14, 2009, 6:03 p.m. More (194 words) 2 comments Feed

So, my PyObjC introduction talk was accepted at EuroPython. The conference is held at Birmingham, UK, from 28th June to 4th July. My talk is scheduled for Wednesday, 1st July.

europython 2009

June 1, 2009, 8:42 p.m. More (281 words) 4 comments Feed

Well, it's over a month since my last update, so I might as well describe what I've been working on for the past month or so!

May 25, 2009, 4:56 p.m. More (399 words) 2 comments Feed

Key Value Coding or KVC is a very important part of Cocoa. Accessing these properties can be a kludge though - you have to use setValue_forKey_(value, key) and valueForKey_(key) which is quite verbose. Luckily, PyObjC has a nice shortcut: a single underscore.

March 31, 2009, 9:59 p.m. More (142 words) 1 comment Feed

As I mentioned some time ago, I'm now doing contracting. At my current project we need to get some more people on board. So if you're a Pythonista and want to work on exciting and challenging stuff for a couple of months (or more), read on!

March 26, 2009, 3:48 p.m. More (274 words) 1 comment Feed

Last Friday was my last day at Resolver Systems. I am now doing contracting work (mostly Python) for various clients, and I plan to move back to Greece soon.

March 1, 2009, 12:52 p.m. More (270 words) 6 comments Feed

Packt Publishing were kind enough to send me Expert Python Programming by Tarek Ziadé, only with my opinion in exchange.

Here is what I think about it.

January 23, 2009, 11:25 p.m. More (1677 words) 2 comments Feed

PySmell is an autocompletion library for Python, supporting Vim, Emacs and TextMate.

This is a very minor release, just because I had some commits unreleased for two months. Changelog inside.

Get it from PyPI. PySmell's homepage is hosted at Google Code.

January 16, 2009, 6:41 p.m. More (90 words) 4 comments Feed

2008 is almost gone, and I got a lot of things done. Here's what I did, and here's what I plan to do in 2009.

December 29, 2008, 8:53 p.m. More (710 words) 0 comments Feed

Today I worked with William on the promising ironclad project which allows you to use CPython extension such as numpy under IronPython. Ironclad needs to setup some import hooks to allow the loading of .pyd files. Here's some findings.

December 20, 2008, 12:49 a.m. More (580 words) 4 comments Feed

After a ton of bug reports for TextMate, and some very constructive feedback and testing from Jesse Noller, I've decided there's no much point in waiting, so I'm happy to announce PySmell v0.7.2.

Grab it from PyPI and follow the instructions in README.markdown.

November 16, 2008, 11:42 p.m. More (138 words) 9 comments Feed

I often exchange small snippets or links with my girlfriend, and it's been very annoying having to right click on iChat, select the correct account and start a chat. So I've automated it!

Here is a small PyObjC snippet that will allow you to send iChat messages from the command line, using the ScriptingBridge framework and a bit of elbow grease. The next step would be to make a wrapper for it so it can live a an icon on the Desktop, but I'll try that some other time.

November 7, 2008, 10:12 p.m. More (264 words) 1 comment Feed

I'm very proud to announce the release of PySmell v0.7. PySmell is an auto-completion library for Python, meant to be plugged in different editors.

The big news for this release is the support for Emacs and TextMate, on top of the already existing Vim support.

Grab PySmell from PyPI

EDIT: PySmell 0.7.1 fixes a nasty TextMate bug, so please try again if you were put off by it!

Read inside for more information!

November 2, 2008, 10:02 p.m. More (163 words) 22 comments Feed

I'm not sure how much I've written about this, but you can probably discern by the titles of my blog posts that I'm looking for a good text editor. I think I've finally nailed my frustrations, and I think I have a glimpse of a solution.

October 29, 2008, 8:02 p.m. More (712 words) 26 comments Feed

One of the pleasures of open source is that random people contribute back uninvited. I received a setuptools patch the other day, and I'm trying to make things work. However, setuptools makes things hard -- although not so hard that I couldn't manage uploading PySmell to PyPI.

October 26, 2008, 11:31 p.m. More (681 words) 3 comments Feed

I'm happy to announce PySmell v0.6, an autocompletion library for Python and Vim (other editors pending).

New features include:

  • Import statement completion
  • Support for multiple TAGS files (that means external libraries)
  • Support for analysing Python 2.4-2.5 stdlib.

Plus many bugfixes and minor improvements.

Grab it here: PySmell v0.6

October 13, 2008, 10:45 p.m. More (507 words) 3 comments Feed

In PyCon UK, the two keynote speakers, Mark Shuttleworth and Ted Leung raised the issue of how Python should "open up" and aim to be the best language at everything (Mark's point) and the easiest language to work with (Ted's point). I agree with both them, I was nodding all the time when they spoke.

Here are my thoughts on the state of GUI toolkits and how could Python take a first step to be on the web.

September 19, 2008, 10:02 p.m. More (1047 words) 6 comments Feed

I've justed tagged version 0.5 of PySmell, the intellisense (or auto-completion, or omni-completion) provider for Python in github.

You can grab it here: http://github.com/orestis/pysmell/tree/v0.5

UPDATE: I've put up my lighting talk here: http://orestis.gr/static/downloads/pysmell-lightningtalk.pdf

September 15, 2008, 6:45 p.m. More (136 words) 10 comments Feed

Sitting in the lunch refectory, writing about the talks I've witnessed:

  • The Savoury Flavors of Python 2.6 and Python 3.0
  • PyPy's Python Interpreter - Status and Plans
  • In Search of Speed and Flexibility
September 13, 2008, 1:41 p.m. More (338 words) 0 comments Feed

Following up from my previous post on Python and static typing, I'm proud to announce PySmell v0.1!

UPDATE2: PySmell v0.5 released

UPDATE: PySmell v0.2 released, get it here

PySmell is a python IDE completion helper, that covers 80% of the cases, leaving the rest to superior human brains.

It tries to statically analyze Python source code, without executing it, and generates information about a project's structure that IDE tools can use. There is currently support for Vim's omnicompletion, but porting to other editors which provide similar mechanisms should be straightforward.

In its current state it doesn't do any type inferencing, but it's surprisingly useful even without that. I plan to add simple type inferencing in the coming versions.

August 31, 2008, 11:37 p.m. More (369 words) 8 comments Feed

I have read numerous articles about dynamic languages and static typing, the most recent being Steve Yegge's Dynamic Languages Strike Back, where he argues that most of the time, there is enough type information in a program written in a dynamic language (he uses Javascript) to do all kinds of cool refactorings.

I'm building a small proof-of-concept to do something like that in Python, for Python. Here are my thoughts... UPDATE: Read about PySmell, a tool I wrote to provide static auto-completion for Python projects.

August 25, 2008, 11:02 p.m. More (792 words) 10 comments Feed

I've created and released a small Vim plugin that will try to mimic TextMate's behaviour to insert the closing pair of quotes, brackets, parentheses, braces etc. Download simple pairs! (I've also created one for Emacs)

I used Vim's built-in python scripting support, and seeing that it wasn't documented very well, I present some useful patterns here.

August 10, 2008, 6:22 p.m. More (548 words) 10 comments Feed

I've been stumbled a bit just now, trying to populate an NSOutlineView from PyObjC.

Read on for my solution!

June 7, 2008, 9:16 p.m. More (387 words) 1 comment Feed

I'm planning to do a screencast for this, but knowing myself, I'll just put the code here in case I run off to a different direction tomorrow...

So, I present a very lightly annotated hello world app in PyObjC!

Download PyObjC tutorial (24 KB)

May 17, 2008, 12:07 a.m. More (175 words) 7 comments Feed

If you like Python and you like Mac OS X, you should really check out PyObjC.

It's a bridge that allows you to create first-class Cocoa applications using Python. It also has support from Interface Builder and XCode in Leopard and it's already bundled with Apple's Developer Tools!

Unfortunately, if you followed the above link, it doesn't seem there's a lot of stuff going on. The examples are outdated and there hasn't been any update since January.

This is a call to arms to help the project gain some better documentation, for the benefit of everyone involved.

May 15, 2008, 6:20 p.m. More (306 words) 6 comments Feed

In the office I have to use Windows instead of my preferred OS X - no wonder, since we're developing a Windows application using .NET and IronPython.

This is a post detailing my quest to make emacs behave as I want it, that is, to make it more Windows-y and more TextMate-y.

February 28, 2008, 8:37 a.m. More (1003 words) 7 comments Feed

As you may know (you probably don't :), I've built a greeklish to greek converter for my Diploma thesis, using Python.

It worked well enough (for a diploma thesis), but it was slow. I mean, really, really slow. It was coded in Pure Python (tm) and had no optimizations whatsoever.

After optimizing some stuff I decided I had to rewrite it using numpy, if I wanted to see significant speed-ups. I document some of my findings in this post.

February 9, 2008, 5:52 p.m. More (1169 words) 3 comments Feed

In response to Michael's post , about a nasty regex...

January 29, 2008, 2:41 a.m. More (44 words) 2 comments Feed

So, yesterday I was asked an interesting question:

Int: Are you familiar with Python's getattr?
Me: Um, yes?
Interviewer clarifies what it's all about
Int: So I now want you to implement __getattr__ in such a way that when a method is called with the prefix print it'll print it's name before calling it.

December 10, 2007, 6:26 a.m. More (1186 words) 0 comments Feed

I spend much time on other people's computers - I'd like to be able to hack for 30 minutes on an idea, but unfortunately, it isn't easy. I have to download and install numerous software packages, like python, django, subversion, an SSH client etc. So I decided to put all that in a flash drive and take it around with me.

July 4, 2007, 9:56 p.m. More (138 words) 6 comments Feed

There is a neat piece of functionality in Django that will allow you to traverse your object graph by date:

Get next or previous by FOO, where FOO is a Date or DateTime field:

For every DateField and DateTimeField that does not have null=True, the object will have get_next_by_FOO() and get_previous_by_FOO() methods, where FOO is the name of the field. This returns the next and previous object with respect to the date field, raising the appropriate DoesNotExist exception when appropriate...

However, these methods use the default manager, that may be not what one wants.

July 3, 2007, 3:34 p.m. More (399 words) 0 comments Feed

I just caught up with the Django timeline, and I saw changeset 5519!

Congratulations, boulder sprinters!

June 25, 2007, 1:43 p.m. More (31 words) 0 comments Feed

Or, a tale of reinventing the wheel

Seriously. For web-apps we have tens (maybe hundreds) of frameworks that abstract away the painful details of creating data-based applications.

I mean, using Django, you can whip-up some models, generate the appropriate database schema, play around in admin, maybe use databrowse, generate nice html forms, add a dash of HTML+CSS and you get maybe 80% of the functionality. Then you add your custom views, report generation, a bit of AJAX --if necessary-- and you have a nice data-based web application ready for deployment.

June 16, 2007, 4:04 a.m. More (1254 words) 8 comments Feed

I use markdown to edit the posts in this blog, using the python markdown library. However, I discovered a nagging problem that will cause to me switch away, to something like ReST.

May 28, 2007, 12:22 p.m. More (169 words) 9 comments Feed

Today I discovered the excellent python module for plotting matlab style, matplotlib. It allowed me to quickly visualize some data I am crunching for my diploma thesis.

May 24, 2007, 9:57 p.m. More (114 words) 1 comment Feed