Author Archives: lorg

Wikipedia Images

Posted on June 21, 2011 by lorg

A few days ago a friend (x) of a friend (y) showed me and my friend (y) a small app he was developing, that had photos from flickr and picasa. We suggested adding photos from Wikipedia as well, but he … Continue reading →

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Posted in Programming | Tagged , , , | 2 Comments

Python Module Usage Stats – Feb 2011

Posted on February 28, 2011 by lorg

Here are the top 30 “base modules”, ordered by number of PyPI projects importing them. These results are based on 11,204 packages download from PyPI. Explanations, full results and code to generate them are available below. Continue reading →

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Posted in Python | Tagged , , , | 9 Comments

10 Awesome Theorems & Results

Posted on February 13, 2011 by lorg

When I look back at various mathematical courses I took, most have at least one theorem that I really liked. Usually I like it because the proof has a surprising trick, sometimes it’s because of the unexpected conclusion, or maybe … Continue reading →

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Posted in Cryptography, Math | Tagged , | 12 Comments

Beautiful Code

Posted on February 5, 2011 by lorg

A few days ago, @edensh mentioned in Facebook beautiful code, and many people gave examples of assembly, while I was thinking of Python. That got me thinking: what is beautiful code for me? So here are my criteria for beautiful … Continue reading →

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Posted in Programming Philosophy | Tagged , , , , | 1 Comment

Small programming challenge No. 6 – nblocks

Posted on January 25, 2011 by lorg

I came up with this challenge when I had to write a function to divide a sequence to percentiles. I needed this to calculate some statistics over trips for plnnr.com. “This sounds trivial” I thought, and reached for my simple … Continue reading →

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Posted in Challenges, Programming, Python, Statistics | Tagged , , , , | 21 Comments

Moving to a new server

Posted on December 8, 2010 by lorg

I moved the blog to a new server, and a new wordpress install. It will take me some time to get everything back in order, but once I finish it, I’m going to get back to writing regularly. Stay tuned!

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Posted in Miscellaneous | Leave a comment

One-liner Guitar Tuner in Python

Posted on April 22, 2010 by lorg

On windows, assuming imports are free: import winsound winsound.Beep(220*((2**(1/12.0))**7), 2000) But that’s just because I like to tune to E. If you prefer a more “natural looking” note, you can use A: winsound.Beep(110, 1000) But why choose at all when … Continue reading →

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Posted in Python, Sound | Tagged , , , | 2 Comments

Visualizing Data Using the Hilbert Curve

Posted on April 17, 2010 by lorg

Some time ago, a coworker asked me to help him visualize some data. He had a very long series (many millions) of data points, and he thought that plotting a pixel for each one would visualize it well, so he … Continue reading →

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Posted in Fractals, Graphics, Math, Programming, Python | Tagged , , , | 2 Comments

Fuzz-Testing With Nose

Posted on March 30, 2010 by lorg

A few days ago, I found a in my website, plnnr.com. The bug was in a new feature I added to the algorithm. The first thing I did was write a small unit-test to reproduce the bug. With that unit-test … Continue reading →

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Posted in Python, Testing | Tagged , , , | 3 Comments

Open Redirects

Posted on March 26, 2010 by lorg

In this post I’ll discuss an issue I tackled a short while ago – open redirects. But first, the story of how I got to it. Feel free to skip ahead to the technical discussion. Background Our analytics for plnnr.com … Continue reading →

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Posted in Programming, Security, web-design | Tagged , , , , , , , | Leave a comment