查看2dj的游客区是否有新公告

import re
from bs4 import BeautifulSoup
from urllib import request
from time import sleep
from tkinter import messagebox

def msgBox():
    warn = messagebox.showinfo("Hello", "Hello")
    print(warn)

url = "http://bbs4.2djgame.net/home/forum.php?mod=forumdisplay&fid=360&filter=typeid&typeid=911"
headers = {"User-Agent":"User-Agent:Mozilla/5.0"}
url_with_headers = request.Request(url, headers=headers)
html_doc = request.urlopen(url_with_headers)
soup = BeautifulSoup(html_doc, ‘html.parser‘)
target_id = re.compile(r"normalthread_[0-9]+")
tbodys = soup.find_all(‘tbody‘, id=target_id)
pre = len(tbodys)

while True:
    url = "http://bbs4.2djgame.net/home/forum.php?mod=forumdisplay&fid=360&filter=typeid&typeid=911"
    headers = {"User-Agent":"User-Agent:Mozilla/5.0"}
    url_with_headers = request.Request(url, headers=headers)
    html_doc = request.urlopen(url_with_headers)
    soup = BeautifulSoup(html_doc, ‘html.parser‘)
    target_id = re.compile(r"normalthread_[0-9]+")
    tbodys = soup.find_all(‘tbody‘, id=target_id)
    cur = len(tbodys)
    if cur == pre:
        print("No New")
    else:
        print("New One")
        msgBox()
        break