auto save

snake.py

@@ -43,18 +43,19 @@ while True:
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇画上去
-    if setheading == "right":
+
+    if setheading=="right":
         x+=30
-    elif setheading == "left":
+    elif setheading=="left":
         x-=30
-    elif setheading == "down":
+    elif setheading=="down":
         y+=30
     else:
         y-=30
     a.append((x,y))
     a.pop(0)
     # 将贪吃蛇的身体画上去
-    screen.blit(snakehead, a[-1])  
+    screen.blit(snakehead , a[-1])  
     for i in range(len(a)-1):
         screen.blit(body,a[i])
     # 将果实画上去