[Python2] Download weekly Bing wallpapers to a given folder. Can run it as a cron job everyday

bing_wallpaper_downloader.py

import json, os
import os
import time
import urllib
import urllib2
from os.path import expanduser
from datetime import datetime

home_site = "http://bing.com"
weekly_wallpapers_url = home_site + "/HPImageArchive.aspx?format=js&idx=0&n=8&mkt=en-US"

def get_weekly_wallpapers():
  wallpapers_folder = os.path.join( expanduser('~'), 'Pictures/BingWallpapers' )
  is_force = False

  if not os.path.exists(wallpapers_folder):
    os.makedirs(wallpapers_folder)  

  try:

    r = urllib2.urlopen( weekly_wallpapers_url )
  
    weekly_wallpapers =  json.load(r)['images']
    print "\n[%s]" % (datetime.now())
    print "There are %s wallpapers on the feed" % (len(weekly_wallpapers))
    
    for wallpaper in weekly_wallpapers:
      
      download_url =  wallpaper['url']
        
      if home_site not in download_url:
        download_url = home_site + download_url
      
      file_name = wallpaper['startdate'] + "_" + wallpaper['title'] + '.jpg'
        
      wallpaper_path = os.path.join(wallpapers_folder, file_name )
      
      #Wallpaper doesn't exist
      if os.path.isfile(wallpaper_path) is False or is_force is True:
         
        print "Downloading " + wallpaper['copyright'].encode('utf-8')

        urllib.urlretrieve ( download_url, wallpaper_path  )
        print wallpaper_path
    print "All weekly wallpapers are downloaded successfully"
  except Exception, e:
    print "error"
    print e
    time.sleep(1)

  else:
    pass
  finally:
    pass

get_weekly_wallpapers()