text: import urllib
  
  from url_shortener import URLShortener
  
  
  class ClckruShortener (URLShortener):
   def __init__ (self, *args, **kwargs):
    self.name = "clck.ru"
    return super(ClckruShortener, self).__init__(*args, **kwargs)
  
   def _shorten (self, url):
    answer = url
    api = urllib.urlopen ("http://clck.ru/--?url=" + urllib.quote(url))
    if api.getcode() == 200:
     answer = api.read()
    api.close()
    return answer
  
   def created_url (self, url):
    return 'clck.ru' in url
  