unquote

http_server.py

 #!/usr/bin/env python
 # -*- coding:utf-8 -*-
 import json
-from urllib.parse import quote
+from urllib.parse import unquote
 
 import tornado.web
 import tornado.ioloop
@@ -19,7 +19,7 @@ class BaseHandler(tornado.web.RequestHandler):
 
 class KwHandler(BaseHandler):
     async def get(self):
-        target = quote(self.get_argument('keyword'))
+        target = unquote(self.get_argument('keyword'))
         res = self.predictorfac.predict(target)
         res['status'] = 1
         self.write(res)