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()
@@ -56,20 +57,21 @@ while True:
     position.append((x, y))
     # 将背景图画上去
     if x == apple_x and y == apple_y:
-        apple_x = random.randint(0, 660)
-        apple_y = random.randint(0, 480)
-
-    position.pop(0)
-    # 将贪吃蛇的头画上去
+        num1 = random.randint(1, 22)
+        num2 = random.randint(1, 16)
+        apple_x = 30*num1-30
+        apple_y = 30*num2-30
+    else:
+        position.pop(0)
     screen.blit(background, (0, 0))
-    
+    # 将贪吃蛇的头画上去
     screen.blit(snake_head, position[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         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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