python - how to know pygame.Rect's side that collide to other Rect?

Question

I am using pygame, python3.9, I want to make to return which side(rect1) is collided with rect2. I've already tried this but it dosen't work. I just want internal module and pygame.(sorry for bad english)

def side(rect1, rect2):
    direction = ""
    if rect1.midtop[1] > rect2.midtop[1]:
        direction = "top"
    if rect1.midleft[0] > rect2.midleft[0]:
        direction = "left"
    if rect1.midright[0] < rect2.midright[0]:
        direction = "right"
    if rect1.midbottom[1] < rect2.midbottom[1]:
        direction = "bottom"
    return direction

Answer 1

The side of the collision depends on th relatuve moving direction. The relative movment is the difference of the movement of rect1 and rect2.

Anyway, you can try to compute the difference of the on each side and to find the distance with the minimum amount:

dr = abs(rect1.right - rect2.left)
dl = abs(rect1.left - rect2.right)
db = abs(rect1.bottom - rect2.top)
dt = abs(rect1.top - rect2.bottom)

if min(dl, dr) < min(dt, db):
    direction = "left" if dl < dr else "right"
else:
    direction = "bottom" if db < dt else "top"