auto save

snake.py

 import pygame
-from pygame import locals
 
+from pygame import locals
+import random
 # 初始化pygame，为使用硬件做准备
 pygame.init()
+FPSCLOCK=pygame.time.Clock()
 
 # 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
-FPSCLOCK = pygame.time.Clock()  # pygame时钟，控制游戏速度（帧数）
 
 # 背景
 background = pygame.image.load('bg.png')
-right = pygame.image.load('right.png')      # 头 朝右
-food = pygame.image.load('apple.png')       # 食物 苹果
-body = pygame.image.load('body.png')        # 身体
-left = pygame.image.load('left.png')        # 头 朝左
-up = pygame.image.load('up.png')            # 头 朝上
-down = pygame.image.load('down.png')        # 头 朝下
+right = pygame.image.load('right.png')
+food = pygame.image.load('apple.png')
+body = pygame.image.load('body.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
 
-x, y = 240, 120
-position = [(180, 90), (180, 120), (210, 120), (x, y)]
 
-setheading = "right"
+x,y = 240,120
+posltion = [(180,90),(180,120),(210,120),(x,y)]
+apple_x = 360
+apple_y = 300
+setheading = 'right'
 snake_head = right
 
 while True:
@@ -29,40 +32,49 @@ while True:
             # 接收到退出事件后退出程序
             exit()
         if event.type == locals.KEYDOWN:
-            if event.key == locals.K_RIGHT and setheading != "left":
+            if event.key == locals.K_RIGHT and setheading != 'left':    
                 setheading = 'right'
                 snake_head = right
-            if event.key == locals.K_LEFT and setheading != "right":
+
+            if event.key == locals.K_LEFT and setheading != 'right': 
                 setheading = 'left'
                 snake_head = left
-            if event.key == locals.K_UP and setheading != "down":
+
+            if event.key == locals.K_UP and setheading != 'down': 
                 setheading = 'up'
                 snake_head = up
-            if event.key == locals.K_DOWN and setheading != "up":
+    
+            if event.key == locals.K_DOWN and setheading != 'up': 
                 setheading = 'down'
                 snake_head = down
 
-    # 设置贪吃蛇的头部坐标
-    if setheading == "right":
+
+    
+    if setheading == 'right':
         x += 30
-    elif setheading == "left":
+    elif setheading == 'left':
         x -= 30
-    elif setheading == "up":
+    elif setheading == 'up':
         y -= 30
     else:
         y += 30
-    position.append((x, y))
-    position.pop(0)
+    posltion.append((x,y))
+    if x == apple_x and y == apple_y: 
+        num1 = random.randint(1,22)
+        num2 = random.randint(1,16)       
+        apple_x == 30*num1-30
+        apple_y == 30*num2-30
+    else:
+        posltion.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
-    # 将贪吃蛇的头画上去
-    screen.blit(snake_head, position[-1])
+    # 将贪吃蛇画上去
+    screen.blit(snake_head, posltion[-1])
     # 将贪吃蛇的身体画上去
-    for i in range(len(position)-1):
-        screen.blit(body, position[i])
-
+    for i in range(len(posltion)-1):
+        screen.blit(body,posltion[i])
     # 将果实画上去
-    screen.blit(food, (360, 300))
+    screen.blit(food, (apple_x,apple_y))
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)
\ No newline at end of file