url2png.py

import urllib
import hashlib
 
class Url2png(object):
    
    def __init__(self, options):
        self.apikey = 'PXXXX'
        self.secret = 'SXXXX'
 
        self.query_string = urllib.urlencode(options)
        self.token = hashlib.md5(self.query_string + self.secret).hexdigest()

    @property
    def url(self):
        return "http://api.url2png.com/v6/%s/%s/png/?%s" % (self.apikey, self.token, self.query_string)
 
options = {
  'url': "http://www.google.com",
  'viewport': "1024x768",
  'thumbnail_max_width': 200,
}
 
print Url2png(options).url