save project

snake.py

 import pygame
 from pygame import locals
-
+import random
 # 初始化pygame，为使用硬件做准备
 pygame.init()
 
@@ -22,7 +22,8 @@ position = [(180, 90), (180, 120), (210, 120), (x, y)]
 
 setheading = "right"
 snake_head = right
-
+apple_x = 360
+apple_y = 300
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -51,8 +52,18 @@ while True:
         y -= 30
     else:
         y += 30
+    if x<0 or x>630 or y<0 or y>450:
+        exit()
+    if position[-1] in position[:-1]:
+        exit()
     position.append((x, y))
-    position.pop(0)
+    if x == apple_x and y == apple_y:
+        mum1 = random.randint(1,22)
+        mum2 = random.randint(1,16)
+        apple_x = mum1*30-30
+        apple_y = mum2*30-30
+    else:
+        position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -62,7 +73,7 @@ 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)
\ No newline at end of file
+    FPSCLOCK.tick(8)