Fix issues with getitem on compiled objects that have annotations, see #1719

jedi/inference/compiled/access.py

@@ -211,7 +211,22 @@ class DirectObjectAccess:
     def py__getitem__all_values(self):
         if isinstance(self._obj, dict):
             return [self._create_access_path(v) for v in self._obj.values()]
-        return self.py__iter__list()
+        if isinstance(self._obj, (list, tuple)):
+            return [self._create_access_path(v) for v in self._obj]
+
+        if self.is_instance():
+            cls = DirectObjectAccess(self._inference_state, self._obj.__class__)
+            return cls.py__getitem__all_values()
+
+        try:
+            getitem = self._obj.__getitem__
+        except AttributeError:
+            pass
+        else:
+            annotation = DirectObjectAccess(self._inference_state, getitem).get_return_annotation()
+            if annotation is not None:
+                return [annotation]
+        return None
 
     def py__simple_getitem__(self, index):
         if type(self._obj) not in ALLOWED_GETITEM_TYPES:
@@ -221,8 +236,14 @@ class DirectObjectAccess:
         return self._create_access_path(self._obj[index])
 
     def py__iter__list(self):
-        if not hasattr(self._obj, '__getitem__'):
+        try:
+            iter_method = self._obj.__iter__
+        except AttributeError:
             return None
+        else:
+            p = DirectObjectAccess(self._inference_state, iter_method).get_return_annotation()
+            if p is not None:
+                return [p]
 
         if type(self._obj) not in ALLOWED_GETITEM_TYPES:
             # Get rid of side effects, we won't call custom `__getitem__`s.