Simple script to retreive the highest rated (1080p) image from reddit.com/r/wallpapers and apply it as the windows desktop image.

desktop.py

import urllib2, ctypes
import os, re
from time import sleep

__author__ = "Thomas Cranny"
__version__ = "1.0"

def CheckConnection(checks=5*60, delay=1):
  for i in range(checks):
		try:
			response=urllib2.urlopen("http://google.com",timeout=1)
			return True
		except urllib2.URLError as err:
			pass

	return False

def GetContent():
	site = "http://www.reddit.com/r/wallpapers"
	req = urllib2.urlopen(site)
	data = ""
	try:
		data = req.read()
	except Exception, e:
		print("Error: Could not open site > {0}".format(site))
	return data

def DownloadImage(link):
	fname = "dl" + re.search("\.\w*$",link).group(0)
	f = open(fname, "wb")
	f.write(urllib2.urlopen(link).read())
	f.close()
	return fname

def FindFirstImageLink(data):
	link = re.search("(http://i\.imgur\.com/\w{4,10}\.(?:jpg|png))\" >.{5,100}\[1920x1080\]", data)
	if link:
		link = link.group(0)
		link = re.search("http://i\.imgur\.com/\w{4,10}\.(?:jpg|png)", link)
		link = link.group(0)
	else:
		print("Error: No Imgur links found")
	return link

def SetDesktopBackground(image, rem=True):
	SPI_SETDESKWALLPAPER = 20
	ctypes.windll.user32.SystemParametersInfoA(SPI_SETDESKWALLPAPER, 0, image, 0)
	if rem: os.remove(image)

def Run():
	if not CheckConnection():
		print("Could not establish a connection, terminating")
		return
	print("Connecting to Reddit.com...")
	content = GetContent()
	print("Extacting best 1080x1920 image...")	
	link = FindFirstImageLink(content)
	print("Retreiving image...")
	image = DownloadImage(link)
	print("Applying Desktop...")
	SetDesktopBackground(image)
	print("Done!")

Run()