From 1109b373a120726af7f07008ed8e8e0da110ff56 Mon Sep 17 00:00:00 2001
From: Charles Haley <cbhaley@i.wont.say.com>
Date: Thu, 19 Sep 2013 07:54:44 +0200
Subject: [PATCH] Fix formatter function "count" to return zero for an empty
 list

---
 src/calibre/utils/formatter_functions.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/calibre/utils/formatter_functions.py b/src/calibre/utils/formatter_functions.py
index 8fcc35e3bb..b8ff7b0387 100644
--- a/src/calibre/utils/formatter_functions.py
+++ b/src/calibre/utils/formatter_functions.py
@@ -589,7 +589,7 @@ class BuiltinCount(BuiltinFormatterFunction):
             'uses an ampersand. Examples: {tags:count(,)}, {authors:count(&)}')
 
     def evaluate(self, formatter, kwargs, mi, locals, val, sep):
-        return unicode(len(val.split(sep)))
+        return unicode(len([v for v in val.split(sep) if v]))
 
 class BuiltinListitem(BuiltinFormatterFunction):
     name = 'list_item'