如何在pygame中制作碰撞检测器

import pygame
from pygame.locals import *

pygame.init()

screen = pygame.display.set_mode((800, 600))
pygame.display.set_caption("碰撞检测器")

player = pygame.Rect(300, 400, 50, 50)
enemy = pygame.Rect(400, 300, 50, 50)

running = True
while running:
    for event in pygame.event.get():
        if event.type == QUIT:
            running = False
    
    # 更新玩家角色的位置
    keys = pygame.key.get_pressed()
    if keys[K_LEFT]:
        player.x -= 5
    if keys[K_RIGHT]:
        player.x += 5
    if keys[K_UP]:
        player.y -= 5
    if keys[K_DOWN]:
        player.y += 5
    
    # 检测碰撞
    if player.colliderect(enemy):
        print("碰撞发生！")
    
    # 渲染游戏画面
    screen.fill((255, 255, 255))
    pygame.draw.rect(screen, (255, 0, 0), player)
    pygame.draw.rect(screen, (0, 0, 255), enemy)
    pygame.display.flip()

pygame.quit()