save project

snake.py

@@ -25,32 +25,33 @@ while True:
             # 接收到退出事件后退出程序
             # 接收到退出事件后退出程序
             exit()
             exit()
         if event.type == locals.KEYDOWN:
         if event.type == locals.KEYDOWN:
-            if event.key==K_RIGHT and setheading != "left":
+            if event.key==locals.K_RIGHT and setheading != "left":
                 setheading="right"
                 setheading="right"
-            elif event.key==K_LEFT and setheading != "right":
+            elif event.key==locals.K_LEFT and setheading != "right":
                 setheading="left"
                 setheading="left"
-            elif event.key==K_UP and setheading != "down"
+            elif event.key==locals.K_UP and setheading != "down":
                 setheading="up"
                 setheading="up"
-            else:
+            elif event.key==locals.K_DOWN and setheading != "up":
+               
                 setheading="down"
                 setheading="down"
     # 将背景图画上去
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))
     # 将贪吃蛇的身体画上去
     # 将贪吃蛇的身体画上去
     if setheading=="right":
     if setheading=="right":
         x+=30
         x+=30
-        a=right
+        head=right
     elif setheading=="left":
     elif setheading=="left":
         x-=30
         x-=30
-        a=left
+        head=left
     elif setheading=="up":
     elif setheading=="up":
-        x-=30
-        a=up
+        y-=30
+        head=up
     else:
     else:
-        x+=30
-        a=down
+        y+=30
+        head=down
     list.append((x,y))
     list.append((x,y))
     list.pop(0)
     list.pop(0)
-    screen.blit(a, (x, y))
+    screen.blit(head, (x, y))
     for i in range(len(list)-1):
     for i in range(len(list)-1):
         screen.blit(body,list[i])
         screen.blit(body,list[i])
     # 将果实画上去
     # 将果实画上去