[Tutor] Long and Nasty List Comprehensions... for fun. (original) (raw)

israel at uandmedance.com israel at uandmedance.com
Thu Jul 15 00:13:04 CEST 2004

I've recently cooked up a very long list comprehension (1027
characters!) out of sheer perversity that creates a simple html image
gallery script.

It's got a few quirks like requiring a specific directory structure,
specific file types, as well as asking for the desired base directory
twice.

I was wondering if any of you had any tips for improving this
monstrosity of mine. I'd also be interested in seeing any of your absurdly long one liners.
I know I'm only an artist posing as a programmer, so I feel assured
there are other out there who are far more insane than me.

I think this exercise has tempered my love for list comprehensions into
something a little more manageable. debugging something this long and all on one line grew to be a big
pain, fun though it was. :)

#-------------------------------------------------------------------- #!/usr/local/bin/python

import os

'''This Super Long List Comprehension Simple and Ugly Image Gallery requires you to have a directory structure as follows

root directory |--Any Amount of Directories set up like so. ( filled with the
full sized .png images. ) |--Thumbnail directory called 'thumb' ( filled with small
identically named thumbnail .jpg images )

You merely cd to the directory and call 'python gallery.py' and answer
the two requests for the directory you want to use. Usually this is './'

The resulting html page will look for two stylesheets. base.css highpass.css They aren't provided, but you can use them to style your fabulous new image gallery script. '''

if name == 'main': file(os.path.join(raw_input('What is the base
directory?'),'gallery.html'),'w').write('\n\n<html xmlns="http://www.w3.org/1999/xhtml"
xml:lang="en" lang="en">\n\nSimple, Ugly and Super Long<br>List Comprehension Image Gallery\n\n\n\n\n\n'+'\n'.join(['

\n%s\n
\n' %
(os.path.basename(dirname[0]),'\n'.join(['%s' %
(os.path.join(dirname[0],image),image[:- 4],os.path.join(dirname[0],'thumb',image[:-4]+'.jpg'),image[:-4]) for
image in dirname[2] if image[0] not in ['.'] and image[-4:] in
['.png','.jpg']])) for dirname in os.walk(raw_input('What is the base
directory?')) if os.path.basename(dirname[0]) not in ['thumb'] and
dirname[2] ])+'\n\n') #---------------------------------------------------------------------

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