rename requires-dev to requires-optional

Author: emilykl

contributing.md

@@ -139,7 +139,7 @@ We will support Python 3.12 and higher versions soon.
 ### Install requirements - (Non-Windows)
 ```bash
 (plotly_dev) $ pip install -r packages/python/plotly/requires-install.txt
-(plotly_dev) $ pip install -r packages/python/plotly/requires-dev.txt
+(plotly_dev) $ pip install -r packages/python/plotly/requires-optional.txt
  ```
 ### Install requirements - (Windows + Conda)
 Because Windows requires Visual Studio libraries to compile some of the optional dependencies, follow these steps to
@@ -148,7 +148,7 @@ complete installation and avoid gdal-config errors.
 ```bash
 (plotly_dev) $ pip install -r packages/python/plotly/requires-install.txt
 (plotly_dev) $ conda install fiona
-(plotly_dev) $ pip install -r packages/python/plotly/requires-dev.txt
+(plotly_dev) $ pip install -r packages/python/plotly/requires-optional.txt
 ```
 
 ### Editable install of plotly packages
@@ -178,7 +178,7 @@ documentation on _development mode_.
 This repo uses the [Black](https://black.readthedocs.io/en/stable/) code formatter,
 and the [pre-commit](https://pre-commit.com/) library to manage a git commit hook to
 run Black prior to each commit.  Both pre-commit and black are included in the
-`packages/python/plotly/requires-dev.txt` file, so you should have them
+`packages/python/plotly/requires-optional.txt` file, so you should have them
 installed already if you've been following along.
 
 To enable the Black formatting git hook, run the following from within your virtual
@@ -266,7 +266,7 @@ We take advantage of two tools to run tests:
 
 ### Running Tests with `pytest`
 
-Since our tests cover *all* the functionality, to prevent tons of errors from showing up and having to parse through a messy output, you'll need to install `requires-dev.txt` as explained above.
+Since our tests cover *all* the functionality, to prevent tons of errors from showing up and having to parse through a messy output, you'll need to install `requires-optional.txt` as explained above.
 
 After you've done that, go ahead and run the test suite!
 

packages/python/plotly/MANIFEST.in

@@ -3,6 +3,6 @@ include README.md
 include versioneer.py
 include plotly/_version.py
 include requires-install.txt
-include requires-dev.txt
+include requires-optional.txt
 include requires-express.txt
 include plotly/package_data/widgetbundle.js

packages/python/plotly/requires-dev.txt renamed to packages/python/plotly/requires-optional.txt

@@ -1,5 +1,13 @@
 ### Optional Dependencies for Additional Plotly Functionality   ###
 ###                                                             ###
+### This file lists packages which are not strictly required    ###
+### by Plotly.py, but which are needed to use some of the       ###
+### library's functionality. See headings below for more        ###
+### See headings below for more detail.                         ###
+###                                                             ###
+### Packages used in the development process are also listed    ###
+### here.                                                       ###
+###                                                             ###
 ### To install, run:                                            ###
 ###      $ pip install -r requires-dev.txt                      ###
 ###                                                             ###

packages/python/plotly/setup.py

@@ -562,7 +562,6 @@ def read_req_file(req_type):
     install_requires=read_req_file("install"),
     extras_require={
         "express": read_req_file("express"),
-        "dev": read_req_file("dev"),
     },
     zip_safe=False,
     cmdclass=dict(