webstersprodigy.net

“The pixels in the above image are numbered 0..99 for the first row, 100..199 for the second row etc. White pixels represent ascii codes. The ascii code for a particular white pixel is equal to the offset from the last white pixel. For example, the first white pixel at location 65 would represent ascii code 65 (‘A’), the next at location 131 would represent ascii code (131 – 65) = 66 (‘B’) and so on.

Trying to do this in a somewhat intelligent way this time. The results are better. timing in at around 4 seconds instead of the brute force 11 minutes. I’m very positive it could be sped up much much more by writing in C, but this is just algorithmic, and I’m writing in python.

Stupid single core opteron vs xeon benchmark. This benchmark is to test the single core speed of some operations of a 2.2 GHz Opteron 170 vs a Xeon X5460 3.16 GHz. Our old main server had 4 Opteron cores simlar to the ones used in the benchmard, and the Xeon is the processor in our new server.

This is a simple – not efficient – but doable way to do modular exponentiation

This is my alarm clock script. It plays a random song from /home/lundeen/alarm #!/bin/sh /usr/bin/X11/xterm -display :0 -bg black -fg white \ -e /usr/bin/mplayer -shuffle  /home/lundeen/alarm/* It runs in cron lundeen@mopey-mythy:~$ crontab -l # m h dom mon dow command 00 07 * * 1-5 /home/lundeen/alarm.sh

This is a short commented optparse example #!/usr/bin/env python from optparse import OptionParser #action, type, dest (destination), and help, default #can optionally pass usage in here as a string parser = OptionParser() #notice the first arguments are a list – they define the synonomous commands #destination is the most important – it is what your [...]

This is the very start of our cryptanal program frontend. (for more up to date see the Software page).

This is a dirty implemenation of Golay correcting code using python. This is a solution to 18.13 problem 1 from Trappe and Washington’s Crytography book. To run this, you need bash, python, and the numpy libraries. To run, run golay.sh. The algorithm is located in golay.py

Wellp, here’s a program that does the isbn error checking

This is a silly little program that finds anagrams. Just hangin out practicing python-fu, and this was a challenge I found online.

Though there are many ways to format your gui code, the following seems to work well for me. It is not pretty, but the important thing is just how I laid it out. Basically, I like making a subclass of frame for almost everything.

This is pretty straightforward. I tend to structure all my gui programs so far in almost the same way, with the inherited frame class doing all the packing.

This is a python script that recursively md5sums all the files in your directory and compares it with another directory. It is similar, and probably less good than “find /dirone -type f -print0 | md5sum”

In the book Programming Python’, an entire chapter is dedicated to recursive copyting of directories, recursive deletion, etc. He uses the os tools to accomplish this. The reason something like this is necessary is the fact that the os tools do not have a built-in recusive delete. For example, if in my current directory I had a folder named ‘test2′, I would get the following error when trying to remove it.

This is a stupid script similar to cat. Again, I am using it for windows.

This is something I do again and again… traverse down a directory tree searching and replacing for a certain amount of text. Especially since dynamic content is not allowed on ISU’s main webserver (how lame!)

python script similar to join. I used this to script on windows, since I could not find a join there. def join(fromdir, tofile):   output = open(tofile, ‘wb’)   parts = os.listdir(fromdir)   parts.sort()   for filename in parts:     filepath = os.path.join(fromdir, filename)     fileobj = open(filepath, ‘rb’)     while 1:       filebytes = [...]

For some people in my class this was easy, and others it was difficult. Some people have spent a good 40 hours on this, so I thought I’d post some code to help out. There isn’t much documentation on the crypto modules.

This is a program written in python that gets the weather from the command line. The usage is like: $ weather.py 83204 5-day Forcast for 83206 ——————— Monday Tuesday Wednesday Thursday Friday High: 74 68 47 49 58 Low: 43 34 29 27 32 It breaks occasionally, most likely because wunderground’s output isn’t consistant.  but [...]

I stumbled across this http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html which has the most popular programming languages tracked over 5 years.