我如何知道在Pygame中是否接触到了一个圆和一个矩形？

import pygame
import sys

pygame.init()

# 创建窗口
screen = pygame.display.set_mode((800, 600))
pygame.display.set_caption("Collision Detection")

# 创建圆和矩形
circle_pos = (400, 300)
circle_radius = 50
rect_pos = (300, 200)
rect_size = (200, 100)

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    # 绘制圆和矩形
    pygame.draw.circle(screen, (255, 0, 0), circle_pos, circle_radius)
    pygame.draw.rect(screen, (0, 0, 255), (rect_pos, rect_size))

    # 矩形碰撞检测
    rect_collision = pygame.Rect(rect_pos, rect_size).colliderect(pygame.Rect(circle_pos, (circle_radius, circle_radius)))
    if rect_collision:
        print("矩形和圆发生碰撞！")

    # 圆形碰撞检测
    circle_collision = pygame.Rect(rect_pos, rect_size).colliderect(pygame.Rect(circle_pos, (circle_radius, circle_radius)))
    if circle_collision:
        print("圆和矩形发生碰撞！")

    pygame.display.flip()