code: def get(img, light=False, backend="wal", cache_dir=CACHE_DIR, sat=""):
      
      # home_dylan_img_jpg_backend_1.2.2.json
      cache_name = cache_fname(img, backend, light, cache_dir, sat)
      cache_file = os.path.join(*cache_name)
  
      if os.path.isfile(cache_file):
          colors = theme.file(cache_file)
          colors["alpha"] = util.Color.alpha_num
          logging.info("Found cached colorscheme.")
  
      else:
          logging.info("Generating a colorscheme.")
          backend = get_backend(backend)
  
          # Dynamically import the backend we want to use.
          # This keeps the dependencies "optional".
          try:
              __import__("pywal.backends.%s" % backend)
          except ImportError:
              __import__("pywal.backends.wal")
              backend = "wal"
  
          logging.info("Using %s backend.", backend)
          backend = sys.modules["pywal.backends.%s" % backend]
          colors = getattr(backend, "get")(img, light)
          colors = colors_to_dict(saturate_colors(colors, sat), img)
  
          util.save_file_json(colors, cache_file)
          logging.info("Generation complete.")
  
      return colors
docs: Generate a palette.