Fix some filter issues

jedi/evaluate/context/instance.py

@@ -422,6 +422,9 @@ class InstanceClassFilter(filters.AbstractFilter):
     def _convert(self, names):
         return [LazyInstanceClassName(self._instance, self._class_context, n) for n in names]
 
+    def __repr__(self):
+        return '<%s for %s>' % (self.__class__.__name__, self._class_context)
+
 
 class SelfAttributeFilter(ClassFilter):
     """

jedi/evaluate/context/typing.py

@@ -53,7 +53,14 @@ class _BaseTypingContext(Context):
 
     def get_filters(self, *args, **kwargs):
         # TODO this is obviously wrong.
-        return iter([])
+        class EmptyFilter():
+            def get(self, name):
+                return []
+
+            def values(self):
+                return []
+
+        yield EmptyFilter()
 
     @property
     def name(self):