frontends (tools): Pyjamas's JID implementation can be compared to an object of a different type:

- always return False if the other object is not a JID
    - to not fake list membership's test, hash(jid) now differs from hash(unicode(jid))

frontends/src/tools/jid.py

@@ -58,12 +58,14 @@ except (TypeError, AttributeError): # Error raised is not the same depending on
             return getattr(self.__internal_str, name)
 
         def __eq__(self, other):
+            if not isinstance(other, JID):
+                return False
             return (self.node == other.node
                     and self.domain == other.domain
                     and self.resource == other.resource)
 
         def __hash__(self):
-            return hash(self.__internal_str)
+            return hash('JID<{}>'.format(self.__internal_str))
 
         def find(self, *args):
             return self.__internal_str.find(*args)
@@ -75,7 +77,7 @@ except (TypeError, AttributeError): # Error raised is not the same depending on
                 node_end = 0
             domain_end = self.__internal_str.find('/')
             if domain_end == 0:
-               raise ValueError("a jid can't start with '/'")
+                raise ValueError("a jid can't start with '/'")
             if domain_end == -1:
                 domain_end = len(self.__internal_str)
             self.node = self.__internal_str[:node_end] or None