Hi all,
This post might be a duplicate by i am sharing it anyways 
The purpose for this example is just to get the screen width/height, the browser width/height and browser resize event with (just) python.
I find the example very minimalistic, since there are only a few line of code inside the Form1.
Please feel free to try it out https://browser-width-and-height.anvil.app
Clone to project
PS
This example is another approach of this post https://anvil.works/forum/t/page-resize-events/2361