code: def _restore_cache(gallery):
      
      cachePath = os.path.join(gallery.settings["destination"], ".exif_cache")
      try:
          if os.path.exists(cachePath):
              with open(cachePath, "rb") as cacheFile:
                  gallery.exifCache = pickle.load(cacheFile)
                  logger.debug("Loaded cache with %d entries", len(gallery.exifCache))
          else:
              gallery.exifCache = {}
      except Exception as e:
          logger.warn("Could not load cache: %s", e)
          gallery.exifCache = {}
docs: Restores the exif data cache from the cache file