Quick And Dirty Python Background Changer

qadpbc.py

#!/usr/bin/python -O

# 
# Quick And Dirty Python Background Changer
#
# Designed for Ubuntu Precise 12.04
#
# Please install beautifulsoup python module first :
# sudo aptitude install python-beautifulsoup
#
# Then run the command adding a keyword, eg. :
# ./qadpbc.py robot
# ./qadpbc.py bird
# 
# That's it, your background has changed !
#
# Author Pierre Quillery http://quillery.fr 
# Licence Apache/BSD (= do whatever you want with it)
# 

# Getting the keyword from CLI
import sys
key_word = sys.argv[1] if len(sys.argv) > 1 else 'blue' 

# Getting a feed from Colorlovers XML API
import urllib2
import urllib
url = 'http://www.colourlovers.com/api/patterns/top'
user_agent = 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)'
values = { 'keywords': key_word }
headers = { 'User-Agent' : user_agent }

data = urllib.urlencode(values)
req = urllib2.Request(url, data, headers)
response = urllib2.urlopen(req)
the_page = response.read()

# Parsing it using BeautifulSoup
from BeautifulSoup import BeautifulStoneSoup
from random import choice
soup = BeautifulStoneSoup(the_page)
soup.prettify()

# Getting all the background URLs
urls = []
for url in soup.findAll('imageurl'):
    urls.append( url.text )
    
# We only need one of them, so we choose one randomly
url = choice(urls)

# Now, let's download one of them in the user's home directory
import os
home = os.getenv('HOME')
file_path = home + "/qadpbc_background.png"
urllib.urlretrieve (url, file_path)

# We can set it easily using these two commands
os.system("gsettings set org.gnome.desktop.background picture-uri file://"+file_path)
os.system("gsettings set org.gnome.desktop.background picture-options wallpaper")

# And that's all folks !