批量检测URL中的关键词，并且将不含有关键词的URL输出到txt文件当中

编写代码时遇到的问题

• 写入txt（一开始忘记了tuple类型需要转换为str）
• 处理逻辑（一开始并没有将 body与url绑定到一起，所以或返回所有的url）
• 关闭太早（这点是有点疑惑的，难道不用关闭文本么？加了一个f.close就错了）
• 匹配时忘记了大小写

import requests
from bs4 import BeautifulSoup
import pandas as pd
from openpyxl import Workbook
import concurrent.futures

# 读取 .txt 文件中的 URL
with open("urls.txt", "r") as file:
    urls = file.read().splitlines()

# 存储 URL
data = []

def detect_cvss(url):
    try:
        response = requests.get(url)
        soup = BeautifulSoup(response.text, "html.parser")
        body = soup.find("body").text
        tuple=(url,body)
        if "xxxx" not in tuple[1]:
            print(tuple[0])
            return (tuple[0])
    except:
        return None

with concurrent.futures.ThreadPoolExecutor(max_workers=20) as executor:
    futures = [executor.submit(detect_cvss, url) for url in urls]

    for future in concurrent.futures.as_completed(futures):
        result = future.result()
        if result:
            data.append(result)

#将 URL 和 title 写入 txt 文件
    with open("no_xxxx.txt", 'w') as f:
        for i in data:
            f.write(i + '\n')
            f.close();