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()
@@ -19,6 +20,8 @@ right_a='right'
 right_b=right
 x,y=240, 120
 a_b=[(120,120),(150,120),(180,120),(x,y)]
+apple_x=360
+apple_y=300
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -40,16 +43,20 @@ while True:
 
     if right_a=='light':
         x+=30
-    if right_a=='left':
+    elif right_a=='left':
         x-=30
-    if right_a=='up':
+    elif right_a=='up':
         y-=30
-    if right_a=='down':
+    else :
         y+=30
-
-    x+=30
     a_b.append((x,y))
-    a_b.pop(0)
+    if x==apple_x and y==apple_ty:
+        numder1_x=random.randint(1,22)
+        numder2_y=random.randint(1,16)
+        apple_x=numder1*30-30
+        apple_y=numder2*30-30
+    else:
+        a_b.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
@@ -60,7 +67,7 @@ while True:
     
     
     # 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()
     r.tick(3)
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