Update CONTRIBUTING.md to include jupyter lab local development instr... #5274

Original file line number	Diff line number	Diff line change
Expand Up		@@ -120,6 +120,12 @@ you can install all packages with:
		pip install -e '.[dev]'
		```

	If you're testing local changes in Jupyter Lab or Jupyter Notebook, you'll want to run:
Copy link Contributor @emilykl emilykl Jul 15, 2025 Choose a reason for hiding this comment The reason will be displayed to describe this comment to others. Learn more. Could you explain when to run this command -- does it need to be run only when setting up the environment, or after every change? Also briefly what does it do / what happens if you don't run it? Copy link Collaborator Author @marthacryan marthacryan Jul 18, 2025 Choose a reason for hiding this comment The reason will be displayed to describe this comment to others. Learn more. Just tried to update it! How does it look?
	```bash
	pip install jupyter
	jupyter labextension develop .
	```

		These commands also create an editable install of plotly.py
		so that you can test your changes iteratively without having to rebuild the plotly.py package explicitly;
		for more information please see
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