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外框设定

SCREEN_WIDTH = 600      # 屏幕宽度
SCREEN_HEIGHT = 480     # 屏幕高度
SIZE = 20               # 小方格大小
LINE_WIDTH = 1          # 网格线宽度

游戏区域的坐标范围

SCOPE_X = (0, SCREEN_WIDTH // SIZE - 1)
SCOPE_Y = (2, SCREEN_HEIGHT // SIZE - 1)

食物的分值及颜色

FOOD_STYLE_LIST = [(10, (255, 100, 100)), (20, (100, 255, 100)), (30, (100, 100, 255))]LIGHT = (100, 100, 100)
DARK = (200, 200, 200)      # 蛇的颜色
BLACK = (0, 0, 0)           # 网格线颜色
RED = (200, 30, 30)         # 红色，GAME OVER 的字体颜色
BGCOLOR = (40, 40, 60)      # 背景色def print_text(screen, font, x, y, text, fcolor=(255, 255, 255)):imgText = font.render(text, True, fcolor)screen.blit(imgText, (x, y))

初始化蛇

def init_snake():snake = deque()snake.append((2, SCOPE_Y[0]))snake.append((1, SCOPE_Y[0]))snake.append((0, SCOPE_Y[0]))return snakedef create_food(snake):food_x = random.randint(SCOPE_X[0], SCOPE_X[1])food_y = random.randint(SCOPE_Y[0], SCOPE_Y[1])while (food_x, food_y) in snake:# 如果食物出现在蛇身上，则重来food_x = random.randint(SCOPE_X[0], SCOPE_X[1])food_y = random.randint(SCOPE_Y[0], SCOPE_Y[1])return food_x, food_ydef get_food_style():return FOOD_STYLE_LIST[random.randint(0, 2)]def main():pygame.init()screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))pygame.display.set_caption('贪吃蛇')font1 = pygame.font.SysFont('SimHei', 24)  # 得分的字体font2 = pygame.font.Font(None, 72)  # GAME OVER 的字体fwidth, fheight = font2.size('GAME OVER')# 如果蛇正在向右移动，那么快速点击向下向左，由于程序刷新没那么快，向下事件会被向左覆盖掉，导致蛇后退，直接GAME OVER# b 变量就是用于防止这种情况的发生b = True

蛇

    snake = init_snake()

食物

    food = create_food(snake)food_style = get_food_style()

方向

    pos = (1, 0)game_over = Truestart = False       # 是否开始，当start = True，game_over = True 时，才显示 GAME OVERscore = 0           # 得分orispeed = 0.5      # 原始速度speed = orispeedlast_move_time = Nonepause = False       # 暂停while True:for event in pygame.event.get():if event.type == QUIT:sys.exit()elif event.type == KEYDOWN:if event.key == K_RETURN:if game_over:start = Truegame_over = Falseb = Truesnake = init_snake()food = create_food(snake)food_style = get_food_style()pos = (1, 0)# 得分score = 0last_move_time = time.time()elif event.key == K_SPACE:if not game_over:pause = not pauseelif event.key in (K_w, K_UP):# 这个判断是为了防止蛇向上移时按了向下键，导致直接 GAME OVERif b and not pos[1]:pos = (0, -1)b = Falseelif event.key in (K_s, K_DOWN):if b and not pos[1]:pos = (0, 1)b = Falseelif event.key in (K_a, K_LEFT):if b and not pos[0]:pos = (-1, 0)b = Falseelif event.key in (K_d, K_RIGHT):if b and not pos[0]:pos = (1, 0)b = False

填充背景色

        screen.fill(BGCOLOR)

画网格线 竖线

        for x in range(SIZE, SCREEN_WIDTH, SIZE):pygame.draw.line(screen, BLACK, (x, SCOPE_Y[0] * SIZE), (x, SCREEN_HEIGHT), LINE_WIDTH)

画网格线 横线

        for y in range(SCOPE_Y[0] * SIZE, SCREEN_HEIGHT, SIZE):pygame.draw.line(screen, BLACK, (0, y), (SCREEN_WIDTH, y), LINE_WIDTH)if not game_over:curTime = time.time()if curTime - last_move_time > speed:if not pause:b = Truelast_move_time = curTimenext_s = (snake[0][0] + pos[0], snake[0][1] + pos[1])if next_s == food:

吃到了食物

                        snake.appendleft(next_s)score += food_style[0]speed = orispeed - 0.03 * (score // 100)food = create_food(snake)food_style = get_food_style()else:if SCOPE_X[0] <= next_s[0] <= SCOPE_X[1] and SCOPE_Y[0] <= next_s[1] <= SCOPE_Y[1] \and next_s not in snake:snake.appendleft(next_s)snake.pop()else:game_over = True

画食物

        if not game_over:# 避免 GAME OVER 的时候把 GAME OVER 的字给遮住了pygame.draw.rect(screen, food_style[1], (food[0] * SIZE, food[1] * SIZE, SIZE, SIZE), 0)

画蛇

        for s in snake:pygame.draw.rect(screen, DARK, (s[0] * SIZE + LINE_WIDTH, s[1] * SIZE + LINE_WIDTH,SIZE - LINE_WIDTH * 2, SIZE - LINE_WIDTH * 2), 0)print_text(screen, font1, 30, 7, f'速度: {score//100}')print_text(screen, font1, 450, 7, f'得分: {score}')if game_over:if start:print_text(screen, font2, (SCREEN_WIDTH - fwidth) // 2, (SCREEN_HEIGHT - fheight) // 2, 'GAME OVER', RED)pygame.display.update()if __name__ == '__main__':main()