写一个PYthon 能检查指定txt文件里面链接是否为死链的完整代码

以下是一个Python程序，可以检查指定的txt文件中的链接是否为死链：

import requests

filename = "links.txt"   # 要检查的文件名

def check_links(filename):
    with open(filename, "r") as f:
        links = f.readlines()
    for link in links:
        link = link.strip()   # 去掉换行符
        try:
            response = requests.get(link)
            if response.status_code == 200:
                print(link + " is a valid link.")
            else:
                print(link + " is a dead link.")
        except requests.exceptions.RequestException as e:
            print(link + " is a dead link.")

check_links(filename)

该程序使用requests库发送HTTP请求来检查链接的有效性。如果链接返回状态码为200，则认为它是有效的链接。如果链接无法访问或返回状态码为非200，则认为它是死链接