1. import pgzrun
    2. import random
    3. PAD_SPEED = 5
    4. HEIGHT = 600  # 舞台高度
    5. WIDTH = 800  # 舞台宽度
    6. pad_1 = Rect((20, 20), (10, 100))
    7. pad_2 = Rect((WIDTH-30, 20), (10, 100))
    8. scores = [0,0]  #分数
    9. BALL_SPEED = 5
    10. # 定义了一个类，规则
    13. class Ball():
    14.     # 第一个执行，默认执行
    15.     def __init__(self):
    16.         self.reset()
    17.     def reset(self):  # 重置
    18.         self.pos = [400, 300]
    19.         s = random.choice([-1,1])
    20.         self.speed = [BALL_SPEED*s, BALL_SPEED*s]
    22. ball = Ball()  # 把类给实例化
    25. def draw():
    26.     screen.clear()   # 清空屏幕
    27.     screen.draw.filled_rect(pad_1, "blue")  # 画一个矩形
    28.     screen.draw.filled_rect(pad_2, "blue")  # 画一个矩形
    29.     screen.draw.filled_circle(ball.pos, 6, "white")  # 画一个圆
    30.     screen.draw.text(":", midtop=(WIDTH/2, 20),  fontsize=64)
    31.     screen.draw.text(str(scores[0]), topright=(WIDTH/2 - 40, 20),  fontsize=64)
    32.     screen.draw.text(str(scores[1]), topleft=(WIDTH/2 + 40, 20), fontsize=64)
    35. def update(dt):
    37.     if keyboard.w:
    38.         pad_1.y -= PAD_SPEED
    39.     elif keyboard.s:
    40.         pad_1.y += PAD_SPEED
    41.     if keyboard.up:
    42.         pad_2.y -= PAD_SPEED
    43.     elif keyboard.down:
    44.         pad_2.y += PAD_SPEED
    47.     if ball.pos[0] < 1:
    48.         scores[1] += 1
    49.     if ball.pos[0]>WIDTH-1:
    50.         scores[0]+=1
    51.     for i in range(2):
    52.         ball.pos[i] += ball.speed[i]
    53.     if ball.pos[1] < 0 or ball.pos[1] > HEIGHT:
    54.         ball.speed[1] *= -1  # 速度变成反方向
    55.     if ball.pos[0] < 0 or ball.pos[0] > WIDTH:
    56.         ball.reset()  # 就重置了
    58.     # pad_1.collidepoint(ball.pos) ：板子和我们的小球相碰了
    59.     if pad_1.collidepoint(ball.pos) and ball.speed[0] < 0:
    60.         ball.speed[0] *= -1
    61.     if pad_2.collidepoint(ball.pos) and ball.speed[0] > 0:
    62.         ball.speed[0] *= -1
    64. music.play("bgm")   
    65. pgzrun.go()

    bgm.mp3背景音乐素材