Open Excel, and you will see a new tab in the ribbon at the top that says PyXLL.

You will use the Jupyter notebook program to edit and run Python scripts. To find and execute the command to start Jupyter, separate instructions for Windows, Mac OS, and Linux are provided below.

The Jupyter notebook system gives Python users a visual, interactive way to run code, display the results, and share the source with others. But Jupyter notebooks have limited interactivity.

The Jupyter Notebook is a web application that allows editing and running notebook documents that contain programming codes, equations, graphical displays and explanatory contents via a web browser.