urllib.error.HTTPError: HTTP Error 403: Forbidden

问题遇到的现象和发生背景

用python读取顶级域名时发生Forbidden问题，也在网上找了好多相关问题，好多说伪装成浏览器就好了，但是加上伪装头之后还会出像这样的问题

问题相关代码，请勿粘贴截图

def get_ipbelong(this_url):
    global data
    url = 'http://ip.tool.chinaz.com/' + this_url
    req = urllib.request.Request(url)  # 创建一个Request对象
    req.add_header('User-Agent',
                   'Mozilla/5.0(Windows NT 10.0 Win64 x64) AppleWebKit/537.36(KHTML, like Gecko)'
                   'Chrome/96.0.4664.93 Safari/537.36')
                   #'Mozilla/5.0 (Windows NT 10.0 Win64 x64) AppleWebKit/537.36 (KHTML, like Gecko)'
    try:
        data = urllib.request.urlopen(req, timeout=10).read().decode('utf-8', errors='ignore')
    except socket.timeout as e:
        print(type(e))
    info_list = re.findall('w50-0">(.*?)</span>', data)
    for i in range(len(info_list)):
        info_list[i] = info_list[i].strip()
    if len(info_list) == 0:
        geo = 'None'
    else:
        geo = info_list[i]
    return geo

运行结果及报错内容

Traceback (most recent call last):
File "D:/我/3.py", line 430, in
update_dic(csv_path, old_dic)
File "D:/我/3.py", line 89, in update_dic
ip_geo = get_ipbelong(domain_list[i])
File "D:/我/3.py", line 51, in get_ipbelong
data = urllib.request.urlopen(req, timeout=10).read().decode('utf-8', errors='ignore')
File "C:\Users\DELL\AppData\Local\Programs\Python\Python38\lib\urllib\request.py", line 222, in urlopen
return opener.open(url, data, timeout)
File "C:\Users\DELL\AppData\Local\Programs\Python\Python38\lib\urllib\request.py", line 531, in open
response = meth(req, response)
File "C:\Users\DELL\AppData\Local\Programs\Python\Python38\lib\urllib\request.py", line 640, in http_response
response = self.parent.error(
File "C:\Users\DELL\AppData\Local\Programs\Python\Python38\lib\urllib\request.py", line 569, in error
return self._call_chain(*args)
File "C:\Users\DELL\AppData\Local\Programs\Python\Python38\lib\urllib\request.py", line 502, in _call_chain
result = func(*args)
File "C:\Users\DELL\AppData\Local\Programs\Python\Python38\lib\urllib\request.py", line 649, in http_error_default
raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 403: Forbidden

我的解答思路和尝试过的方法

添加user-agent之后还是出现同样的问题

我想要达到的结果

传递请求头这样写：

def get_ipbelong(this_url):
    global data
    url = 'http://ip.tool.chinaz.com/' + this_url
    
    headers={'User-Agent':
                   'Mozilla/5.0(Windows NT 10.0 Win64 x64) AppleWebKit/537.36(KHTML, like Gecko)'
                   'Chrome/96.0.4664.93 Safari/537.36'}
                   #'Mozilla/5.0 (Windows NT 10.0 Win64 x64) AppleWebKit/537.36 (KHTML, like Gecko)'
    req = urllib.request.Request(url,headers=headers)  # 创建一个Request对象
    try:
        data = urllib.request.urlopen(req,timeout=20).read().decode('utf-8', errors='ignore')
    ...