nohup没有输出？

输出文件为空

代码在这里（access-key和secret-key屏蔽掉了）

主机 = "yxzlownserveraddress"

import json
import requests
import time
from aliyunsdkcore.client import AcsClient
from aliyunsdkcore.acs_exception.exceptions import ClientException
from aliyunsdkcore.acs_exception.exceptions import ServerException
from aliyunsdkalidns.request.v20150109.DescribeDomainInfoRequest import DescribeDomainInfoRequest
from aliyunsdkalidns.request.v20150109.DescribeDomainRecordsRequest import DescribeDomainRecordsRequest
from aliyunsdkalidns.request.v20150109.UpdateDomainRecordRequest import UpdateDomainRecordRequest


client = AcsClient('Access', 'Secret', 'cn-qingdao')  # 初始化


while True:
    try:
        # 获取记录ID
        request = DescribeDomainRecordsRequest()
        request.set_accept_format('json')
        request.set_DomainName("yxzl.top")
        response = client.do_action_with_exception(request)
        text = str(response, encoding="utf-8")
        wanted = "test"
        for i in json.loads(text)["DomainRecords"]["Record"]:
            if i["RR"] == 主机:
                记录ID = i["RecordId"]
                旧的IP = i["Value"]


        新的IP = requests.get("http://ip.42.pl/raw").text


        if 新的IP != 旧的IP:
            # 更改记录
            try:
                request = UpdateDomainRecordRequest()
                request.set_accept_format('json')
                request.set_RecordId(记录ID)
                request.set_RR(主机)
                request.set_Type("A")
                request.set_Value(新的IP)
                response = client.do_action_with_exception(request)
                print("%s\tIP发生了变化（%s -> %s），已进行更新。" % (time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()),
                                                                旧的IP, 新的IP))
            except:
                print("%s\tIP发生了变化（%s -> %s），但更新失败。" % (time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()),
                                                                旧的IP, 新的IP))
        else:
            print("%s\tIP相同（%s），未进行更改。" % (time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()),
                                                新的IP))
        time.sleep(90)
    except:
        pass

虽然有点晚，但还是看一下我在网上找到的方法：
https://www.jianshu.com/p/ed6c30044436