save project

snake.py

@@ -24,18 +24,18 @@ while True:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-        if event.type==locals.KEYDOWN:
+        elif event.type==locals.KEYDOWN:
             if event.key==locals.K_UP and cx!="down":
-                cx=="up"
+                cx="up"
                 zaoxin=up
             if event.key==locals.K_DOWN and cx!="up":
-                cx=="down"
+                cx="down"
                 zaoxin=down
             if event.key==locals.K_LEFT and cx!="right":
-                cx=="left"
+                cx="left"
                 zaoxin=left
             if event.key==locals.K_RIGHT and cx!="left":
-                cx=="right"
+                cx="right"
                 zaoxin=right
     if cx=="up":
         y-=30