use-hovering | Simple , accessible React hook for tracking hover state | Frontend Utils library

I'm new for python and kivy, and struggling with them.

I wanted to implement drag and drop function (a function that when a image is dragged to another image and dropped on it, do something.) with kivy.

What I want to do are the following three things;

• know the id of the element that the user has been holding now.
• know the id of the element that the user is on hover.
• know the id of the element which was under the pointer when the user has dropped what he had.

I thought this would be useful to deal with them, so I wrote down the python script and .kivy file following. However, it dosen't work as I intended.

there are many problems which I don't know how to solve;

• print(self.id) returns None.
• Even though I am dragging only 1 element, on_touch_up prints None twice.
• once you dragged and dropped a image, the image cannot be dragged anymore.

python file: