FIX: fix incorrect import in deprecation warning for Scene class

[stevenjkern]

I noticed a minor issue in the text of a deprecation warning on the Scene class the other day, where the recommended fully-qualified class name is the same as the one being used:

In [1]: from plotly.graph_objs import Scene

In [2]: Scene()
/Users/skern/.edm/envs/mb_test_plotly3/lib/python3.6/site-packages/plotly/graph_objs/_deprecations.py:477: DeprecationWarning:

plotly.graph_objs.Scene is deprecated.
Please replace it with one of the following more specific types
  - plotly.graph_objs.Scene

The correct class that should be recommended is plotly.graph_objs.layout.Scene. This PR just corrects the few occurrences of that.

[jonmmease]

Hi @stevenjkern,
Thanks for pointing this out! The files that you modified here are automatically generated during the code generation process, so we we'll need to make these changes in the code generation logic so that they are not overwritten when plotly.js is updated. You'll need to update this line in the code generation logic:

plotly.py/packages/python/plotly/codegen/compatibility.py

Line 29 in c576adf

"Scene": {"base_type": dict, "new": ["Scene"]},

to replace "new": ["Scene"] with "new": ["layout"] and then rerun code generation with

$ pip install black  # If you don't have black installed yet
$ python setup.py codegen

Thanks!

[jonmmease]

I added the codegen logic. Thanks again for pointing this out @stevenjkern!