python 3 compatibility

remove __eq__ and __ne__ in Option

tiramisu/storage/dictionary/storage.py

@@ -17,8 +17,6 @@
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 #
 # ____________________________________________________________
-
-
 from tiramisu.i18n import _
 from tiramisu.error import ConfigError
 
@@ -84,8 +82,7 @@ class Cache(object):
         return path in self._cache
 
     def reset_expired_cache(self, cache_type, exp):
-        keys = self._cache.keys()
-        for key in keys:
+        for key in tuple(self._cache.keys()):
             val, created = self._cache[key]
             if exp > created:
                 del(self._cache[key])