FIX: fix incorrect import in deprecation warning for Scene class (#1670)

* FIX: fix incorrect import in deprecation warning for Scene class
* Update codegen logic to produce correct deprecation message

Author: stevenjkern

packages/python/plotly/codegen/compatibility.py

@@ -26,7 +26,7 @@
     "Margin": {"base_type": dict, "new": ["layout"]},
     "Marker": {"base_type": dict, "new": ["scatter", "histogram.selected", "etc."]},
     "RadialAxis": {"base_type": dict, "new": ["layout", "layout.polar"]},
-    "Scene": {"base_type": dict, "new": ["Scene"]},
+    "Scene": {"base_type": dict, "new": ["layout"]},
     "Stream": {"base_type": dict, "new": ["scatter", "area"]},
     "XAxis": {"base_type": dict, "new": ["layout", "layout.scene"]},
     "YAxis": {"base_type": dict, "new": ["layout", "layout.scene"]},

packages/python/plotly/plotly/graph_objs/_deprecations.py

@@ -475,21 +475,21 @@ class Scene(dict):
     """
     plotly.graph_objs.Scene is deprecated.
 Please replace it with one of the following more specific types
-  - plotly.graph_objs.Scene
+  - plotly.graph_objs.layout.Scene
 
     """
 
     def __init__(self, *args, **kwargs):
         """
         plotly.graph_objs.Scene is deprecated.
 Please replace it with one of the following more specific types
-  - plotly.graph_objs.Scene
+  - plotly.graph_objs.layout.Scene
 
         """
         warnings.warn(
             """plotly.graph_objs.Scene is deprecated.
 Please replace it with one of the following more specific types
-  - plotly.graph_objs.Scene
+  - plotly.graph_objs.layout.Scene
 """,
             DeprecationWarning,
         )