道&c

A fantastic weblog on programming: Word Aligned.

Here's the useless hack of the day: how to mix a Paste Deploy configuration file with a Python script to deploy the WSGI app. The configuration file for Paste Deploy uses the common INI syntax, which uses either # or ; for comments. We can insert Python code into the INI file after the ;, since it can be used in Python to finish a statement. The statement is simply a list with a number inside, since it is valid Python code and also denotes a section in the INI file.

The last step is wrapping the INI configuration in triple quotes, and we have:

[0]; import sys, os
[1]; from paste.deploy import loadapp, loadserver
[2]; application = loadapp('config:%s/%s' % (os.getcwd(), sys.argv[0]))
[3]; server = loadserver('config:%s/%s' % (os.getcwd(), sys.argv[0]))
[4]; server(application); """

[server:main]
use = egg:Paste#http
port = 8081

[app:main]
use = egg:Paste#static
document_root = %(here)s/htdocs

;"""

The WSGI application can now be deployed using either:

$ paster serve file.ini
$ python file.ini

Lista de discos da Elis Regina (riscados o que eu tenho):

• Viva a Brotolândia
• Poema de amor
• Elis Regina, 1963
• O bem do amor
• Samba - Eu canto assim
• 2 na bossa
• O fino do fino
• 2 na bossa número 2
• Elis, 1966
• 2 na bossa número 3
• Elis especial
• Elis - como & por quê
• Aquarela do Brasil
• Elis Regina in London
• ...em pleno verão
• Elis no teatro da praia
• Ela
• Elis, 1972
• Elis, 1973
• Elis e tom
• Elis, 1974
• Falso brilhante
• Elis, 1977
• Tranversal do tempo
• Elis especial
• Elis, essa mulher
• Saudade do Brasil
• Elis, 1980
• Montreux Jazz Festival
• Trem azul
• Luz das estrelas
• No fino da bossa 1
• No fino da bossa 2
• No fino da bossa 3
• Elis vive

Coletâneas que eu tenho:

• Nada será como antes
• Pérolas raras
• Os sonhos mais lindos
• O melhor da música de Elis Regina
• Elis Regina Millenium
• Elis revisitada
• Pérolas
• Perfil
• Elis Regina 30 anos
• Elis, 20 anos de saudade

I've reached a new level on programming — I'm just not sure if for better. Here's some code that I wrote yesterday (it's amazing how much programming I do when I'm without an internet connection!):

data = itertools.imap(
        lambda row, seq=sequence, sel=selection: map(
            lambda d: filter_seq(d[0], sel, d[1]),
            zip(seq.values(), row)
        ), data)

I get bonus points because this snippet is inside the filter_seq function, so it's recursive! That's two lambdas, two maps, a zip and a recursion in a single line!