Python coding to connect a "Choroplethe map" to PowerBI report

We want a custom Python visual for Power BI to display geographical information.

N1 Pie Chart: We want to be able to get a choropleth map completed with a pie chart in the centre of the area in python based on a Json file and a label to display the value corresponding to the colour shade used.

N2 Color gradient: We want the colour of the area to be a gradient based on a measure given to the visual inside of Power BI with that measure result to be displayed in the label and the pie chart size based on another one and using inputted legend.

The visual need to be fast so to not slow down the report.
Colours used need to be referenced as a variable at the start of the script in order to be easily changed to fit multiple themes.

N3 Json variable path: Json must be referenced as a variable at the start to be easily swapped for different map according to the current need. It must be available to users only either with local storage or with a private online storge (for example, SharePoint).

N4 2 Metrics: We will be using data similar to the included dataset (quantity and sales for 3 products and a geographic group). The visual need to be able to display both total quantity and value with either the map colour or pie chart size.
With the included dataset, the visual need to display the total value of sales as the colour of the choropleth map and the quantity as the size of the pie chart, depending on the product.
The “Product Values” tab list the value of each product, “Sales QTY” list the total quantity of sales for each product at the lowest level and the tab “Geolevel” link the lowest geolevel to the geolevel used in the Json file (“Geolevel 1“).

Thank for reading.