auto save

snake.py

@@ -28,6 +28,7 @@ snake_head=right
 
 
 
+
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -42,13 +43,13 @@ while True:
                 setheading = "left"
                 snake_head=left
         if event.type == locals.KEYDOWN:
-            if event.key == locals.K_UP and setheading != "up":
-                setheading = "down"
-                snake_head=down
-        if event.type == locals.KEYDOWN:
-            if event.key == locals.K_DOWN and setheading != "down":
+            if event.key == locals.K_UP and setheading != "down":
                 setheading = "up"
                 snake_head=up
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_DOWN and setheading != "up":
+                setheading = "down"
+                snake_head=down
 
     
     if setheading == "right":
@@ -57,14 +58,14 @@ while True:
         x -= 30
     elif setheading == "up":
         y -= 30
-    elif:
+    else:
         y += 30
     shenti.append((x,y))
     shenti.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    screen.blit(right,shenti[-1])
+    screen.blit(snake_head,shenti[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(shenti)-1):
         screen.blit(body,shenti[i])