热点话题检测python代码

以下是一个简单的热点话题检测的Python代码示例：

import requests
from bs4 import BeautifulSoup

def get_news_titles(url):
    response = requests.get(url)
    soup = BeautifulSoup(response.text, 'html.parser')
    titles = []
    for headline in soup.find_all(['h1', 'h2']):
        title = headline.get_text().strip()
        if len(title) > 0:
            titles.append(title)
    return titles

def detect_hot_topics(url):
    titles = get_news_titles(url)
    hot_topics = []
    keywords = ['COVID', 'pandemic', 'vaccine', 'election', 'Brexit', 'climate change']
    for title in titles:
        for keyword in keywords:
            if keyword.lower() in title.lower():
                hot_topics.append(title)
                break
    return hot_topics

url = 'https://www.bbc.com/news'
hot_topics = detect_hot_topics(url)
print('Hot topics:')
for topic in hot_topics:
    print(' - ' + topic)

此代码使用了 `requests` 和 `BeautifulSoup` 库来获取并解析指定新闻网站的页面，然后搜索标题中是否包含热门话题的关键字（如COVID、选举等），如果包含则将其添加到热门话题列表中并输出。请注意，此代码仅是一个简单示例，实际情况可能需要更复杂的算法和技术来识别热门话题。