save project

snake.py

 import pygame
 from pygame import locals
-
-# 初始化pygame，为使用硬件做准备
+import random
 pygame.init()
-
-# 创建一个窗口
 screen = pygame.display.set_mode((660, 480))
 weee=pygame.time.Clock()
-# 背景
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
@@ -19,40 +15,42 @@ x,y=240,120
 postion=[(180,90),(180,120),(210,120),(x,y)]
 sb="right"
 dsb=right
+apple_x=360
+apple_y=300
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
-            # 接收到退出事件后退出程序
             exit()
-        if event.type==locals.KEYDOWN:
+        elif event.type==locals.KEYDOWN:
             if event.key==locals.K_RIGHT and sb!="left":
                 sb="right"
                 dsb=right
-                x+=30
             if event.key==locals.K_LEFT and sb!="right":
                 sb="left"
                 dsb=left
-                x-=30
             if event.key==locals.K_UP and sb!="down":
                 sb="up"
                 dsb=up
-                y-=30
             if event.key==locals.K_DOWN and sb!="up":
                 sb="down"
                 dsb=down
-                y+=30
+        if sb=="right":
+            x+=30
+        elif sb=="left":
+            x-=30
+        elif sb=="up":
+            y-=30
+        else:
+            y+=30
+        if x==apple_x and y==apple_y:
+            apple_x=random.randint(0,660)
+            apple_y=random.randint(480,0)
     postion.append((x,y))
     postion.pop(0)
     screen.blit(background, (0, 0))
-    # 将贪吃蛇画上去
-    screen.blit(right, (x,y))
+    screen.blit(dsb, postion[-1])
     for i in range(len(postion)-1):
         screen.blit(body,(postion[i]))
-    # screen.blit(body, (210, 120))
-    # screen.blit(body, (180, 120))
-    # screen.blit(body, (180, 90))
-    # screen.blit(food, (360, 300))
-    x=x+30
-    # 刷新画面
+    screen.blit(food,(apple_x,apple_y))
     pygame.display.update()
     weee.tick(3)
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