当我运行scraper时，django主页上的输出是正常的，但是url显示一条错误消息404和其他文章，显示我使用了错误的标记https://www.coindesk.com/news/tag/crypto-lending 正确的链接url是https://www.coindesk.com/news/tag/crypto-lending. 带有链接的正确标记是<a title= href<。我怎么写这个标签

from bs4 import BeautifulSoup
import requests

crypto_headlines = []

def crypto_news():
    """ user agent to facilitates end-user interaction with web content"""

    headers = {
        'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36'
    }

    base_url ='https://www.coindesk.com/news'

    source = requests.get(base_url).text

    soup = BeautifulSoup(source, "html.parser")       

    articles = soup.find_all(class_ = 'text-content')

    #print(len(articles))
    #print(articles) 

    for article in articles:

        try:

            headline = article.h4.text.strip()
            text = article.find(class_="card-text").text.strip()
            link = base_url + article.a['href']
            #img_url = base_url + article.image_src['src']

            crypto_dict = {}

            crypto_dict['Headline']= headline
            crypto_dict['Text'] = text
            crypto_dict['Link']= link

            crypto_headlines.append(crypto_dict)
        except AttributeError as ex:
            print('Error:', ex)

    print(crypto_headlines)

crypto_news()