code: def make_image_cache(img_cache):
      
      log.info('Initiating the image cache at {0}'.format(img_cache))
      if not os.path.isdir(img_cache):
          utils.mkdir_p(img_cache)
          utils.mkdir_p(os.path.join(img_cache, '10.1371'))
          utils.mkdir_p(os.path.join(img_cache, '10.3389'))
docs: Initiates the image cache if it does not exist