浏览器端请求

$.getJSON("/currenttime?callback=?",   function (json){      $("#time").html(json);   });

服务器端响应

class currenttime:   def GET(self):   web.header('Content-Type', 'application/javascript;charset=utf-8')   callback = web.input(callback='callback')['callback']   import time, json   p=time.strftime("%S")+"℃"   return "%s(%s)" %(callback,json.dumps(p))