save project

snake.py

@@ -26,16 +26,16 @@ while True:
             # 接收到退出事件后退出程序
             exit()
         if event.type == locals.KEYDOWN:
-            if event.key==locals.K_RIGHT and sd != left:
+            if event.key==locals.K_RIGHT and sd != "left":
                 sd="right"
                 sh=right
-            if event.key==locals.K_LEFT and sd != right:
+            if event.key==locals.K_LEFT and sd != "right":
                 sd="left"
                 sh=left
-            if event.key==locals.K_UP and sd != down:
+            if event.key==locals.K_UP and sd != "down":
                 sd="up"
                 sh=up
-            if event.key==locals.K_DOWN and sd != up:
+            if event.key==locals.K_DOWN and sd != "up":
                 sd="down"
                 sh=down
     # 将背景图画上去
@@ -43,16 +43,16 @@ while True:
     xy.append((x,y))
     xy.pop(0)
     # 将贪吃蛇画上去
-    screen.blit(sh, xy[-1])
-    if sh=="right":
+    
+    if sd=="right":
         x+=30
-    elif sh=="left":
+    elif sd=="left":
         x-=30
-    elif sh=="down":
+    elif sd=="down":
         y+=30
     else:
         y-=30
-    # 将贪吃蛇的身体画上去
+    screen.blit(sh, xy[-1])# 将贪吃蛇的身体画上去
     for i in range(len(xy)-1):
         screen.blit(body,xy[i])
     # screen.blit(body, xy[-2])