code: def get_images(self, results=15, start=0, license=None, cache=True):
          
          
          if cache and ('images' in self.cache) and results==15 and start==0 and license==None:
              return self.cache['images']
          else:
              response = self.get_attribute('images', results=results, start=start, license=license)
              total = response.get('total') or 0
              if results==15 and start==0 and license==None:
                  self.cache['images'] = ResultList(response['images'], 0, total)
              return ResultList(response['images'], start, total)
docs: Get a list of artist images
          
          Args:
              cache (bool): A boolean indicating whether or not the cached value should be used (if available). Defaults to True.
              
              results (int): An integer number of results to return
              
              start (int): An integer starting value for the result set
              
              license (str): A string specifying the desired license type
          
          Returns:
              A list of image document dicts; list contains additional attributes 'start' and 'total'
          
          Example:
          
          >>> a = artist.Artist('Captain Beefheart')
          >>> images = a.get_images(results=1)
          >>> images.total
          49
          >>> images[0]['url']
          u'http://c4.ac-images.myspacecdn.com/images01/5/l_e1a329cdfdb16a848288edc6d578730f.jpg'
          >>>