js json

def uid_chk_url():
    request_time = time.time()
    print(request)
    print(request.json)
    print('270')
    print('270', request.get_data())

        $.ajax({
            url: url,
            method: "POST",
            //data: JSON.stringify('{"uid":"' + term + '"}'),
            data: {uid: term}.toJSONString(),
            //data: {uid: term},
            //dataType: "application/json"
            dataType: "json",
            //contentType: "text/plain",
        }).done(function (msg) {
//            $("#log").html(msg);
            alert(123)
        }).fail(function (msg) {
            alert(456)
        });