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()
 
@@ -10,28 +10,63 @@ screen = pygame.display.set_mode((660, 480))
 # 背景
 background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
+left = pygame.image.load('left.png')
+up = pygame.image.load('up.png')
+down = pygame.image.load('down.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
 x,y=240,120
 PLSCLOCK=pygame.time.Clock()
 postion=[(180,90),(180,120),(210,120),(x,y)]
+setheading="right"
+tou=right
+apple_x=360
+apple_y=240
+num1=random.randint(1,21)
+num2=random.randint(1,15)
 while True:
+    num1=random.randint(1,21)
+    num2=random.randint(1,15)
     for event in pygame.event.get():
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-    x+=30
-    postion.pop(0)
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_UP and setheading!="down" :
+                setheading="up"
+                tou=up
+            if event.key==locals.K_RIGHT and setheading!="left" :
+                setheading="right"
+                tou=right
+            if event.key==locals.K_LEFT and setheading!="right" :
+                setheading="left"
+                tou=left
+            if event.key==locals.K_DOWN and setheading!="up" :
+                setheading="down"
+                tou=down
+    if setheading=="up":
+        y-=30
+    if setheading=="down":
+        y+=30
+    if setheading=="left":
+        x-=30
+    if setheading=="right":
+        x+=30
+    if x==apple_x and y==apple_y:
+        apple_x=num1*30
+        apple_y=num2*30
+    else:
+         postion.pop(0)
     postion.append((x,y))
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right, (x, y))
+    screen.blit(tou, (x, y))
     # 将贪吃蛇的身体画上去
     for i in range(len(postion)-1):
         screen.blit(body,postion[i])
     # 将果实画上去
-    screen.blit(food, (360, 300))
+    screen.blit(food, (apple_x,apple_y))
     # 刷新画面
     PLSCLOCK.tick(3)
     pygame.display.update()
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