About Me

PBX I'm Paul Bissex, and e-scribe.com is my consulting business. I build web applications using open source software, especially Django. I teach photographers web design and professional skills. In the '90s I did graphic design for newspapers and magazines. Then I wrote technology commentary and reviews for Wired, Salon.com, Chicago Tribune, and lots of little places you've never heard of. Feel free to email me.

Book

I'm co-author of "Python Web Development with Django", an excellent guide to my favorite web framework. Its strong points include an introduction to Python, and better coverage of Django 1.0 than nearly anybody else. Published by Addison-Wesley, it is available from Amazon and your favorite technical bookstore as well.

Colophon

Built using Django, served by Apache and mod_wsgi. The database is SQLite. The operating system is FreeBSD, on a VPS hosted at Johncompanies.com. Comment-spam protection by Akismet. Vintage topo imagery from the Maptech archive. The markup engine is Markdown.

Pile o'Tags

Stuff I Use

Akismet, del.icio.us, Django, dpaste.com, Emacs, FreeBSD, Freenode, jQuery, LaunchBar, MacPorts, Markdown, Mercurial, OS X, Postfix, Python, SQLite, Subversion, TextMate, Trac, Ubuntu Linux, wmii

Spam Report

At least 67570 pieces of comment spam killed since January 2008, mostly via Akismet.

Python one-liner of the day

This is a function that takes an integer and returns its ordinal representation, e.g. "1st" for 1 and so on.

It's not the most readable thing, but once I saw the pieces falling into place I couldn't help myself. Repetition of the "th" literal is the only thing that bugs me. Oh well.

ord_text = lambda n: "%d%s" % (n, "th" if 10 < n % 100 < 14 else {1:"st", 2:"nd", 3:"rd"}.get(n % 10, "th"))

Comes with a one-line test suite!

for t in "1st 2nd 3rd 4th 11th 12th 13th 21st 22nd 23rd 111th 112th 113th".split(): assert(ord_text(int(t[:-2])) == t)

Thursday, April 24th, 2008
fun + python
9 comments

Some related posts: Pocket Django • The Language I Will Kind of Learn in 2008: Smalltalk • World's ugliest Django app • Django.June wrapup • Neat Python hack: infix operators • 99-byte Python quicksort • Let's play a game: BASIC vs. Ruby vs. Python vs. PHP • Figlet Captcha

• Comment from Matt Tarbit , later that day

I think you might need to add 111th, 112th and 113th to the string in your test suite.

(Can't be certain though because I get a SyntaxError when trying to run your one-liner in python 2.3.4)

• Comment from Paul , later that day

Excelllent catch, Matt, thanks! Fixed.

And yes, I should have mentioned that this is Python 2.5+ only, due to the ternary logic.

• Comment from Reggie Drake , later that day

Unfortunately, your one-liner is so desirous to be a one-liner that on my resolution it reaches way out of the central column of your layout and past the 'Atom feed' link.

• Comment from Leo Petr , later that day

Great! Now add internationalization for Russian, Swahili, and Chinese.

• Comment from Paul , later that day

I knew that was coming.

I'll need a couple more lines.

• Comment from kbob , later that day

Here's a version that eliminates the repeated "th" AND runs in both Python 2.3 and 2.5.

ord_text = lambda n: str(n) + {1: 'st', 2: 'nd', 3: 'rd'}.get(n % (10 < n % 100 < 14 or 10), 'th')

• Comment from Jason Davies , 2 days later

Nice.

• Comment from Banibrata Dutta , 6 months later

Hi,

Excellent blogroll/site there. Infact I was happy to find this site running on Django. However, the CSS (I believe, since I'm not too good with web-technologies), may need some mending, because using Google Chrome (or even IE), in a 800px wide window the code-snippets run outside the central pane boundary, and onto the right pane, rendering the text undreadable. Hope that you fix it.

cheers,
Banibrata

• Comment from Paul , 6 months later

Banibrata, thanks for the note. Keep in mind that the lines above are extra-wide by design -- they're *supposed* to look too long for their own good. Though a style makeover of the site is inevitable, this post won't be driving it!