[Kivy] Need to render updated recycler view

[test]

i tried moving the populate method around. first i kept it in widget2, cand called it as:

on_release=Widget2().populate()

It didnt work. Then i moved it to Widget1 and tried:

on_release=self.populate()

It behaves the same way in terms of output. Am i making the call the wrong way? Kindly advice.