I remember looking into GUI libraries for Python a while back and this one and qt came up.
However I ended up settling on making a Web UI served via FastAPI. I'm still happy about that decision but this one sounded really nice back then.
WebUI (assuming you're mean python-WebUI) doesn't actually include any UI. This is why PySimpleGUI is nice...you can make a button!
WebUI (assuming you're mean python-WebUI) doesn't actually include any UI. This is why PySimpleGUI is nice...you can make a button!