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()
 
@@ -23,7 +23,37 @@ while True:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-    x+=30
+while True:
+    for event in pygame.event.get():
+        if event.type == locals.QUIT:
+            exit()
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_RIGHT and setheading !="left":
+                setheading ='right'
+                snake_head =right
+            if event.key == locals.K_LEFT and setheading !="right":
+                setheading ='left'
+                snake_head =left
+            if event.key ==locals.K_UP and setheading !="down":
+                setheading ='up'
+                snake_head =up
+            if event.key ==locals.K_DOWN and setheading !="up":
+                setheading ='down'
+                snake_head =down
+    if setheading =="right":
+        x += 30
+    elif setheading =="left":
+        x -= 30
+    elif setheading =="up":
+        y -= 30
+    else:
+        y += 30
+    if x == apple_x and y == apple_y:
+         num1 =random.randint(1,22)
+         num2 =random.randint(1,16)
+         apple_x = num1 * 30 - 30
+         apple_y = num2 * 30 - 30      
+    
     position.append((x,y))  
     position.pop(0)      
     # 将背景图画上去