Merge branch 'master' of https://github.com/plotly/plotly.py

Author: emmanuelle

contributing.md

@@ -64,7 +64,7 @@ the structure of the code and of the repository.
   https://github.com/plotly/plotly.py/issues/1965. If you have writing skills,
   the wording of existing examples can also be improved in places.
 
-Contributing code or documentation are not the only way to contribute! You can
+Contributing code or documentation is not the only way to contribute! You can
 also contribute to the project by
 
 - reporting bugs (see below).
@@ -151,7 +151,12 @@ complete installation and avoid gdal-config errors.
 ```
 This will ensure that the installed packages links to your local development
 directory, meaning that all changes you make reflect directly in your
-environment (don't forget to restart the Jupyter kernel though!).
+environment (don't forget to restart the Jupyter kernel though!). For more
+information see the
+[`setuptools`](https://setuptools.readthedocs.io/en/latest/setuptools.html#development-mode)
+and
+[`pip`](https://pip.pypa.io/en/stable/reference/pip_install/#install-editable)
+documentation on _development mode_.
 
 ### ipywidgets development install
 

packages/python/plotly/optional-requirements.txt

@@ -25,6 +25,7 @@ psutil
 
 ## code formatting
 pre-commit
+black
 
 ## codegen dependencies ##
 inflect

packages/python/plotly/plotly/__init__.py

@@ -39,7 +39,6 @@
         colors,
         io,
         data,
-        colors,
     )
     from plotly.version import __version__
 
@@ -51,7 +50,6 @@
         "colors",
         "io",
         "data",
-        "colors",
         "__version__",
     ]
 
@@ -71,7 +69,6 @@
             ".colors",
             ".io",
             ".data",
-            ".colors",
         ],
         [".version.__version__"],
     )