You can create custom visuals in Power BI Desktop / Service by using Python packages very easily . I am coming up more videos to explain various packages of python and its use in Power BI
This Video is focusing on Heat Map visual in seaborn.
In this video you find the similarity of Excel and Power BI Conditional formatting (explained in the video) to make it easy to understand.
Current series of videos mainly focused on seaborn and matplotlib to create various custom visuals in Power BI. This is video - 1. Many more to come!
Power BI supports the following packages of Python
The list and respective website given below :