如何使用 BeautifulSoup 从网站获取 href 链接

Question

我正在尝试获取下面给定网站中的所有文章链接。

然而，尽管我指定了类 ID 及其路径，但我的代码根本不打印任何内容。

下面是我的代码。

import requests

from lxml import html

from bs4 import BeautifulSoup

from urllib.request import urlopen

html = urlopen("https://uynaa.wordpress.com/category/%d0%be%d1%80%d1%87%d1%83%d1%83%d0%bb%d0%b3%d1%8b%d0%bd-%d0%bd%d0%b8%d0%b9%d1%82%d0%bb%d1%8d%d0%bb/").read()

soup = BeautifulSoup(html, "lxml")

productDivs = soup.findAll('div', attrs={'class' : 'post type-post status-publish format-standard hentry category-56456384'})

for div in productDivs:

    print(div.find('h2')[a]['href'])

如何获取所有链接？

Answer 1

这些链接是通过 JavaScript 从外部 URL 动态加载的。您可以使用此示例来打印所有链接：import jsonimport requests from bs4 import BeautifulSoupdata = {'action': 'infinite_scroll', 'page': 1}api_url = 'https://uynaa.wordpress.com/?infinity=scrolling'page = 1while True:    data['page'] = page    data = requests.post(api_url, data=data).json()    # uncomment next line to print all data:    # print(json.dumps(data, indent=4))    for p in data['postflair']:        print(p)    if data['lastbatch']:        break    page += 1印刷：https://uynaa.wordpress.com/2014/01/02/2013-in-review/https://uynaa.wordpress.com/2013/10/07/%d0%b0%d1%84%d0%b3%d0%b0%d0%bd%d0%b8%d1%81%d1%82%d0%b0%d0%bd-%d0%b0%d0%bd%d1%85%d0%b4%d0%b0%d0%b3%d1%87-%d1%88%d0%b0%d0%bb%d1%82%d0%b3%d0%b0%d0%b0%d0%bd/https://uynaa.wordpress.com/2013/10/07/%d0%b5-%d0%ba%d0%b0%d1%81%d0%bf%d0%b5%d1%80%d1%81%d0%ba%d0%b8%d0%b9-%d0%b1%d0%b8-%d0%b4%d0%b0%d1%80%d0%b0%d0%bd%d0%b3%d1%83%d0%b9%d0%bb%d0%b0%d0%bb-%d1%82%d0%be%d0%b3%d1%82%d0%be%d0%be-%d0%b3%d1%8d/https://uynaa.wordpress.com/2013/10/07/%d1%88%d0%b0%d0%bd%d1%85%d0%b0%d0%b9-%d0%bd%d0%be%d0%b3%d0%be%d0%be%d0%bd/https://uynaa.wordpress.com/2013/10/07/%d1%8d%d0%bd%d1%8d-%d0%b3%d0%b0%d0%b7%d0%b0%d1%80-%d0%bc%d0%b0%d0%bd%d0%b0%d0%b9%d1%85-%d0%b1%d0%b0%d0%b9%d1%81%d0%b0%d0%bd-%d1%8e%d0%bc/https://uynaa.wordpress.com/2013/10/07/500-%d0%b6%d0%b8%d0%bb-%d0%b0%d1%80%d1%87%d0%bb%d1%83%d1%83%d0%bb%d0%b0%d0%b0%d0%b3%d2%af%d0%b9-%d0%b4%d1%8d%d0%bb%d1%85%d0%b8%d0%b9%d0%bd-%d1%86%d0%be%d1%80%d1%8b%d0%bd-%d0%b3%d0%b0%d0%bd%d1%86/https://uynaa.wordpress.com/2013/02/01/%d1%83%d0%bb%d0%b7-%d0%bd%d1%83%d1%82%d0%b3%d0%b8%d0%b9%d0%bd-%d0%bf%d0%b8%d1%84%d0%b0%d0%b3%d0%be%d1%80/https://uynaa.wordpress.com/2013/01/21/%d1%82%d0%b5%d0%bb%d0%b5%d0%b2%d0%b8%d0%b7%d0%b8%d0%b9%d0%bd-%d1%82%d2%af%d2%af%d1%85%d1%8d%d0%bd-%d0%b4%d1%8d%d1%85-%d1%85%d0%b0%d0%bc%d0%b3%d0%b8%d0%b9%d0%bd-%d0%b3%d0%b0%d0%b6%d0%b8%d0%b3-%d1%88/https://uynaa.wordpress.com/2013/01/18/%d0%b0%d0%bf%d0%be%d1%84%d0%b8%d1%81-%d0%be%d0%be%d1%81-%d2%af%d2%af%d0%b4%d1%8d%d0%bd-%d3%a9%d1%80%d0%bd%d3%a9%d1%85-%d0%b6%d2%af%d0%b6%d0%b8%d0%b3/https://uynaa.wordpress.com/2013/01/17/%d0%b0%d1%80%d0%b8%d1%83%d0%bd%d1%82%d0%bd%d1%8b-%d0%bd%d1%83%d1%82%d0%b0%d0%b3-%d0%b8%d0%b9%d0%b3-%d1%8d%d0%b7%d1%8d%d0%b3%d0%bd%d1%8d%d1%85-%d1%85%d0%b0%d0%bd/https://uynaa.wordpress.com/2013/01/15/%d1%81%d0%b0%d1%83%d0%b4%d1%8b%d0%bd-%d1%82%d0%b0%d0%b3%d0%bd%d1%83%d1%83%d0%bb%d1%87%d0%b8%d0%b4-%d0%b0%d1%81%d0%b0%d0%b4%d1%8b%d0%b3-%d0%be%d0%bb%d0%b6%d1%8d%d1%8d/https://uynaa.wordpress.com/2013/01/15/%d0%bc%d0%b0%d0%bb%d0%b8%d0%b3%d1%8d%d1%8d%d1%81-%d1%81%d0%be%d0%bc%d0%b0%d0%bb%d0%b8-%d1%85%d2%af%d1%80%d1%82%d1%8d%d0%bb/https://uynaa.wordpress.com/2013/01/10/%d1%85%d0%be%d1%80%d0%b2%d0%be%d0%be-%d0%b5%d1%80%d1%82%d3%a9%d0%bd%d1%86-%d1%85%d0%b0%d0%bb%d0%b0%d0%b0%d1%81%d0%b0%d0%bd%d0%b4-%d0%b1%d0%b0%d0%b3%d1%82%d0%b0%d0%bd%d0%b0/https://uynaa.wordpress.com/2013/01/10/%d1%82%d0%b0%d0%bd%d0%b3%d0%b0%d1%80%d0%b0%d0%b3-%d3%a9%d1%80%d0%b3%d3%a9%d1%85-%d1%91%d1%81%d0%bb%d0%be%d0%bb-%d1%85%d2%af%d0%bb%d1%8d%d1%8d%d0%b6-%d0%b1%d0%b0%d0%b9%d0%b3-%d1%8d%d1%8d/https://uynaa.wordpress.com/2013/01/09/%d0%b1%d0%be%d0%bb%d0%bb%d0%b8%d0%b2%d1%83%d0%b4%d1%8b%d0%bd-%d0%ba%d0%b8%d0%bd%d0%be%d0%bd%d0%be%d0%be%d1%81-%d1%87-%d0%b0%d0%b9%d0%bc%d0%b0%d0%b0%d1%80/https://uynaa.wordpress.com/2013/01/08/%d0%bf%d0%b5%d0%bd%d1%82%d0%b0%d0%b3%d0%be%d0%bd-%d0%b1%d0%be%d0%bb%d0%be%d0%bd-%d1%82%d1%82%d0%b3-%d1%8b%d0%b3-%d1%83%d0%b4%d0%b8%d1%80%d0%b4%d0%b0%d1%85-%d0%bc%d0%b0%d0%b3%d0%b0%d0%b4%d0%bb%d0%b0/https://uynaa.wordpress.com/2013/01/07/%d0%b7%d0%b8%d0%b0%d0%b4-%d1%82%d0%b0%d0%ba%d0%b8%d0%b5%d0%b4%d0%b4%d0%b8%d0%bd/...and so on.编辑：要仅过滤指定类别的链接，您可以使用以下脚本：import jsonimport requests from bs4 import BeautifulSoupdata = {'action': 'infinite_scroll', 'page': 1}api_url = 'https://uynaa.wordpress.com/?infinity=scrolling'all_links = []page = 1while True:    data['page'] = page    data = requests.post(api_url, data=data).json()    # uncomment next line to print all data:    # print(json.dumps(data, indent=4))    soup = BeautifulSoup(data['html'], 'html.parser')    for p in soup.select('.post'):        if any('%d0%be%d1%80%d1%87%d1%83%d1%83%d0%bb%d0%b3%d1%8b%d0%bd-%d0%bd%d0%b8%d0%b9%d1%82%d0%bb%d1%8d%d0%bb' in cat['href'] for cat in p.select('[rel="category tag"]')):            if p.h2.a['href'] not in all_links:                print(p.h2.a['href'])                all_links.append(p.h2.a['href'])      if data['lastbatch']:        break    page += 1print(len(all_links))打印 135 个链接：...https://uynaa.wordpress.com/2011/05/13/%e2%80%9c%d1%83%d1%85%d0%b0%d0%b0%d0%bd-%d0%bc%d1%83%d1%83%d1%82%d0%bd%d1%83%d1%83%d0%b4%d1%8b%d0%bd-%d2%af%d0%b5%e2%80%9d/https://uynaa.wordpress.com/2011/05/04/%d2%af%d1%85%d0%bb%d0%b8%d0%b9%d0%bd-%d1%82%d0%be%d0%b3%d0%bb%d0%be%d0%be%d0%bc/https://uynaa.wordpress.com/2011/05/04/%d0%be%d1%81%d0%b0%d0%bc%d0%b0-%d0%b1%d0%b8%d0%bd-%d0%bb%d0%b0%d0%b4%d0%b5%d0%bd%d0%b8%d0%b9%d0%b3-%d1%8f%d0%b0%d0%b6-%d0%b8%d0%bb%d1%80%d2%af%d2%af%d0%bb%d1%81%d1%8d%d0%bd-%d0%b1%d1%8d/135

Answer 2

不确定为什么你的代码不起作用。对我来说，我使用下面的代码首先获取所有链接。list_href = []a_tags = soup.find_all('a')for tag in a_tags:    list_href.append(tag.get('href'))文章的链接位于 list_href[5:26] 中。