From a07f7b396b5235fe1ca9ae1ab2fd873ed94d2301 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 15 Apr 2010 06:37:23 +0530
Subject: [PATCH] Fix #5300 (png and jpg to cbr/cbz conversion issue)

---
 src/calibre/ebooks/metadata/archive.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/calibre/ebooks/metadata/archive.py b/src/calibre/ebooks/metadata/archive.py
index fdf0ceee98..0af41c274f 100644
--- a/src/calibre/ebooks/metadata/archive.py
+++ b/src/calibre/ebooks/metadata/archive.py
@@ -13,7 +13,8 @@ from calibre.customize import FileTypePlugin
 
 def is_comic(list_of_names):
     extensions = set([x.rpartition('.')[-1].lower() for x in list_of_names])
-    return len(extensions) == 1 and iter(extensions).next() in ('jpg', 'jpeg', 'png')
+    comic_extensions = set(['jpg', 'jpeg', 'png'])
+    return len(extensions - comic_extensions) == 0
 
 class ArchiveExtract(FileTypePlugin):
     name = 'Archive Extract'