似乎无法访问元标记

如何解决似乎无法访问元标记

我需要从新闻文章中抓取作者和日期，但是我无法访问Meta标签中的某些信息。

import requests,random,re,os
from bs4 import BeautifulSoup as bs
import urllib.parse
import time
from newspaper import Article


url = ['https://www.wsj.com/articles/covid-19-is-dividing-the-american-worker-11598068859?mod=hp_lead_pos7',##WALL STREET JOURNAL
for link in url:

    #Try 1
    #Get the published date -- this is where I have problems. 
    webpage = requests.get(link)
    soup = bs(webpage.text,"html.parser")
    date = soup.find("Meta",{"name": "article.published"})
    print(date)



    #Try 2
    #Access date from the <time> tag instead
    for tag in soup.find_all('time',{"class": "timestamp article__timestamp flexBox__flex--1"}):
        date = tag.text
        print(date)





    #Get the author name -- this part works
    article = Article(link,language='en')
    article.download()
    article.parse()
    # print(article.html)

    author = article.authors
    date = article.publish_date
    author = author[0]

    day_month = str("Check Date")
    print(day_month + "," + "," + str(author))

当我打印出汤时，我可以在输出中获取Meta标记，所以我知道它们在那里，但是我似乎无法通过两种方法访问它们。

这是到目前为止我得到的输出： 没有 检查日期，克里斯托弗·米姆斯

有什么想法吗？

解决方法

如果您未指定用户代理，则网站将返回另一个页面（找不到404页面）。您可以指定任何有效的使用代理，例如

import requests
from bs4 import BeautifulSoup as bs


HEADERS = {
    'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:77.0) Gecko/20100101 Firefox/77.0',}
url = ['https://www.wsj.com/articles/covid-19-is-dividing-the-american-worker-11598068859?mod=hp_lead_pos7']

## WALL STREET JOURNAL
for link in url:

    # Get the published date -- this is where I have problems.
    webpage = requests.get(link,headers=HEADERS)
    soup = bs(webpage.text,"html.parser")
    date = soup.find("meta",{"name": "article.published"})
    print(date['content'])

    # Access date from the <time> tag instead
    for tag in soup.find_all('time',{"class": "timestamp article__timestamp flexbox__flex--1"}):
        date = tag.text
        print(date.strip())
    

输出：

2020-08-22T04:01:00.000Z
Aug. 22,2020 12:01 am ET

,

报纸在查询效率方面存在一些问题，因为在目标HTML中定位某些数据元素时存在一些导航方面的问题。我注意到，您需要查看目标的HTML，以确定可以使用 Newspaper

中的功能/方法查询哪些项目。

《华尔街日报》上的元标记包含作者的姓名，文章标题，文章摘要，文章发表的数据和文章关键字，而无需使用BeautifulSoup。

from newspaper import Article
from newspaper import Config

user_agent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Firefox/78.0'

config = Config()
config.browser_user_agent = user_agent

url = 'https://www.wsj.com/articles/covid-19-is-dividing-the-american-worker-11598068859?mod=hp_lead_pos7'
article = Article(url,config=config)
article.download()
article.parse()
article_meta_data = article.meta_data

article_published_date = str({value for (key,value) in article_meta_data.items() if key == 'article.published'})
print(article_published_date)

article_author = sorted({value for (key,value) in article_meta_data.items()if key == 'author'})
print(article_author)

article_title = {value for (key,value) in article_meta_data.items() if key == 'article.headline'}
print(article_title)

article_summary = {value for (key,value) in article_meta_data.items() if key == 'article.summary'}
print(article_summary)

keywords = ''.join({value for (key,value) in article_meta_data.items() if key == 'news_keywords'})
article_keywords = sorted(keywords.lower().split(','))
print(article_keywords)

我希望这个答案对您有所帮助。

P.S。 BeautifulSoup 是 Newspaper 中的依赖项，因此可以这样称呼：

from newspaper.utils import BeautifulSoup