__getitem__ in instances.

jedi/evaluate/representation.py

@@ -220,6 +220,7 @@ class Instance(use_metaclass(CachedMetaClass, Executed)):
             method = self.get_subscope_by_name('__getitem__')
         except KeyError:
             debug.warning('No __getitem__, cannot access the array.')
+            return []
         else:
             return self._evaluator.execute(method, [iterable.AlreadyEvaluated(indexes)])