# 
# 
# patch "tracvc/mtn/cache.py"
#  from [d3523d72b987f92937c6b537803bde4c11e668ff]
#    to [002c9c78cae717b48ab71dec380935bcccd0c473]
# 
============================================================
--- tracvc/mtn/cache.py	d3523d72b987f92937c6b537803bde4c11e668ff
+++ tracvc/mtn/cache.py	002c9c78cae717b48ab71dec380935bcccd0c473
@@ -219,8 +219,13 @@ class Memoize(object):
         return self
 
     def __call__(self, *args):
+        # Currently, we can only handle one single arg. Moreover,
         # shelve only supports keys of type integer or string
-        key = len(args)==1 and args[0] or args
+        if len(args) == 1:
+            key = args[0]
+        else:
+            key = args
+
         try:
             return self.cache.get(key)
         except KeyError: