+try:
+ covers = musicbrainzngs.get_image_list(release_mbid)
+except musicbrainzngs.ResponseError as e:
+ errmsg("error: cannot retrieve image list for release")
+ errmsg(e)
+ if isinstance(e.cause, urllib.error.HTTPError) and e.cause.code == 404:
+ errmsg("is %s a release MBID?" % (release_mbid))
+ sys.exit(1)
+