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()
 
@@ -12,19 +12,43 @@ background = pygame.image.load('bg.png')
 right = pygame.image.load('right.png')
 food = pygame.image.load('apple.png')
 body = pygame.image.load('body.png')
+head='right'
 Time=pygame.time.Clock()
 x,y=(240,120)
 list=[(360, 300),(180, 120),(210, 120),(x,y)]
-
+apple_x,apple_y=300,360
 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:
+            if event.key == locals.K_DOWN and head != 'up':
+                head='down'
+
+            if event.key == locals.K_UP and head != 'down':
+                head='up'
+            if event.key == locals.K_RIGHT and head != 'left':
+                head='right'
+            if event.key == locals.K_LEFT and head != 'right':
+                head='left'   
 
     screen.blit(background,(0,0))
     screen.blit(right,(x,y))
-    x+=30
+    if head=='right':
+        x +=30
+    if head=='left':
+        x -=30
+    if head=='up':
+        y -=30
+    if head=='down':
+        y +=30
+    if x==apple_x and y==apple_y:
+        apple_x=random.randint(1,21)*30       
+        apple_y=random.randint(1,15)*30
+        
+
+    
     list.append((x,y))
     list.pop(0)
     # 将背景图画上去
@@ -38,7 +62,7 @@ while True:
     # screen.blit(body, (180, 120))
     # screen.blit(body, (180, 90))
     # 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()
     Time.tick(3)
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