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()
 
@@ -19,10 +19,11 @@ 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
-
+score = 0
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -52,8 +53,16 @@ while True:
     else:
         y += 30
     position.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:
     position.pop(0)
     # 将背景图画上去
+    if x < 0 or x > 630 or y < 0 or y > 450:
+        exit()
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
     screen.blit(snake_head, position[-1])