pyrho's web

Dropship - Torrents for dropbox

Mon, 25 Apr 2011 08:14:45 -0400

Dropship - Torrents for dropbox

Ad targeting by RapLeaf

Mon, 25 Oct 2010 12:30:54 -0400

Ad targeting by RapLeaf

Amazing video

Mon, 25 Oct 2010 04:24:33 -0400

Amazing video

Serving images with CairoPlot and Django

Sun, 10 Oct 2010 13:52:44 -0400

I’ve been experiencing with Django lately, and I must say it’s amazing. I’m quite new to the scaffolding frameworks world, so I can’t really says how it compares to it’s brother Ruby On Rails.

But one thing is for sure, I think there’s a new version of RoR or ruby out, and all the tutorials I found were outdated, and finding help/ressources seemed so much easier for django than RoR.

Enough with the intro, I’m doing a little project in Django to edit data using a spearsheet (something similar to google docs). You can choose the rows and column via an interface, and a spreadsheet is generated allowing to edit the value of a couple {Row,Col}.

And I wanted to generate charts of the data contained in the spreadsheet, I stumbled upon CairoPlot, which is a nice and simple little library that allows you to generate charts in python using cairo. (See this blog post for examples, the site and more generally the internet has no information on cairoPlot sadly).

So I a hube n00b, but I finally succeeded in serving dynamic charts using CairoPlot in Django. And I thought I’ll share my experience since I had to hack into the library’s code to use it properly.

CairoPlot allows you with a simple line to generate a chart …. but to a file. I wanted to generate a dynamic image for my django template, not a file.

My template looks like this:

 <img src="/generateChart"/>

And my /generateChart view is:

 def gen_chart(request):
   heigth = 600
   width = 400

   data = {"OK" : 50, "KO" : 20, "Easy fix": 30}
   background = cairo.LinearGradient(300, 0, 300, 400)
   background.add_color_stop_rgb(0,0,0.4,0)
   background.add_color_stop_rgb(1.0,0,0.1,0)
   surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, heigth, width)
   context = cairo.Context(surface)

   colors = [ (50.0/255, 205.0/255, 50.0/255),
           (255.0/255, 0/255, 0/255),
           (210.0/255, 105.0/255, 30.0/255) ]


   pp = CairoPlot.PiePlot(surface, data, heigth, width, background = None, gradient = True, shadow = True, series_colors = colors )
   pp.render()

   response = HttpResponse(mimetype="image/png")

   pp.surface.write_to_png(response)

   return response

The key here is not to call the regulare CairoPlot.pie_plot() function, which tries to save the image directly, but to call the PiePlot constructor with a cairo.ImageSurface as the first argument, get the created object, get it’s surface and call write_to_png(response) on it. And most importantly, create the correct HttpReponse object and write the png to the response object.

This must be very confusing, but I wrote this very quickly :P

Video

Fri, 27 Aug 2010 08:53:22 -0400

Artificial knowledge?

Wed, 07 Jul 2010 04:18:06 -0400

Artificial knowledge?:

This is great news for the internet ! Wikipedia has the widest human knowledge database available freely online, and making it easily understandable to computers opens the way for a form of artificial knowledge! Finally the semantic web has arrived.

credits to kornestik for the idea (:

Thu, 22 Apr 2010 14:17:51 -0400

credits to kornestik for the idea (:

How stereo (or not) vinyls work !

Fri, 12 Mar 2010 06:25:51 -0500

How stereo (or not) vinyls work !

Just awesome !

Tue, 02 Mar 2010 17:26:21 -0500

Just awesome !

Old: Legend Of Zelda Dance-Fest Commercial

Sun, 28 Feb 2010 17:58:59 -0500

Old: Legend Of Zelda Dance-Fest Commercial:

I remember seeing this video (the original Japanese commercial for The Legend of Zelda: A Link to the Past) a long time ago, and you’re probably gonna yell at me because you…

Photo

Tue, 23 Feb 2010 19:47:32 -0500

Photo

Fri, 19 Feb 2010 05:51:54 -0500

Connect any site to Google Buzz (:

Thu, 11 Feb 2010 05:03:02 -0500

Connect any site to Google Buzz (:

A great article on Google vs China

Thu, 28 Jan 2010 09:01:21 -0500

A great article on Google vs China

Diet Candy Fail

Thu, 31 Dec 2009 16:44:30 -0500

Diet Candy Fail:

epic fail pictures - Diet Candy Fail, aids, video, diet, candy, commercial, weight loss

Google and Multivac

Tue, 29 Dec 2009 12:22:06 -0500

Google and Multivac:

Neil Fraser compares Multivac, a giant all-knowing computer from an Isaac Asimov short story, with Google. “An army of civil servants fed it data constantly and another army correlated and…

How Fanboys View Other Operating Systems

Sat, 26 Dec 2009 23:42:18 -0500

How Fanboys View Other Operating Systems:

This is a little graphic depicting how fanboys view their operating system compared to others. I thought it was pretty cute, especially the little Mac boy. Also, who else feels like…

8bit awesomeness

Tue, 22 Dec 2009 19:37:05 -0500

8bit awesomeness

Just got the colored keys for my HHKB :D. So 1337…. Some...

Tue, 22 Dec 2009 16:04:34 -0500

Just got the colored keys for my HHKB :D. So 1337….

Some more photos of my crazy ass setup here

M. Hortefeux, refusez le prix de "l'antiracisme" de l'UPJF

Tue, 22 Dec 2009 11:27:51 -0500

M. Hortefeux, refusez le prix de "l'antiracisme" de l'UPJF:

Monsieur le Ministre,

Supposez que vous appreniez par vos services que depuis plusieurs mois, une association notoirement connue publie sans relâche sur son site Internet des articles qui…