import pygame, sys
from pygame.locals import *
from pygame.sprite import AbstractGroup


obj1 = pygame.Rect((20,50), (50,100))
obj2 = pygame.Rect((10,10), (100,100))
obj3 = pygame.Rect((0,0), (50,50))

print(obj1.colliderect(obj2))
print(obj1.colliderect(obj3))
print(obj2.colliderect(obj3))