What is the first step needed to create a custom Python visual in Power BI Desktop?

To create a custom Python visual in Power BI Desktop, the critical first step is to enable the script visuals option in the Visualization pane. This option needs to be activated to allow the Power BI Desktop environment to recognize and utilize Python scripts when creating visualizations. When this feature is enabled, users gain access to the option to add a Python visual to their reports.

Activating the script visuals option ensures that all necessary configurations and functionalities are set up to support Python integration. Once this step is complete, users can proceed to input their Python scripts for visualizations, utilize standard libraries for data manipulation and visualization, and ultimately display custom visuals that leverage Python's capabilities within the Power BI environment. Therefore, enabling the script visuals option is foundational to integrating Python successfully into Power BI reports.