auto save

snake.py

 import pygame
 from pygame import locals
+import random
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
@@ -19,7 +20,8 @@ down = pygame.image.load('down.png')        # 头 朝下
 
 x, y = 240, 120
 position = [(180, 90), (180, 120), (210, 120), (x, y)]
-
+apple_x=360
+apple_y=300
 setheading = "right"
 snake_head = right
 
@@ -29,29 +31,32 @@ 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":
-        x += 30
-    elif setheading == "left":
-        x -= 30
-    elif setheading == "up":
-        y -= 30
-    else:
-        y += 30
+            x += 30
+        elif setheading == "left":
+            x -= 30
+        elif setheading == "up":
+            y -= 30
+        else:
+            y += 30
     position.append((x, y))
+    if x == apple_x and y == apple_y:
+        apple_x = random.randint(0,660)
+        apple_y = random.randint(0,480)
     position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
@@ -62,7 +67,7 @@ while True:
         screen.blit(body, position[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)
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