collide.py

WIDTH = 640
HEIGHT = 480

BLACK = (0, 0, 0)
RED = (120, 0, 0)

box = Rect((100, 100), (100, 100), anchor=('left', 'top'))
player = Rect((300, 100), (100, 100), anchor=('left', 'top'))

def update(dt):
    x = player.x
    y = player.y
    dx = 0
    dy = 0
    if keyboard.left:
        dx = -100 * dt
    elif keyboard.right:
        dx = 100 * dt
    elif keyboard.up:
        dy = -100 * dt
    elif keyboard.down:
        dy = 100 * dt

    if dx != 0 or dy != 0:
        player.x += dx
        player.y += dy

        if player.colliderect(box):
            player.x = x
            player.y = y

def draw():
    screen.fill((0, 128, 0))
    screen.draw.filled_rect(box, BLACK)
    screen.draw.filled_rect(player, RED)