使用 selenium 和 beautifulsoup 的网页抓取代码无法正常工作

Question

我为网络抓取悉尼先驱晨报编写了 Python 代码。此代码首先单击所有显示更多按钮，然后抓取所有文章。硒部分工作正常。但我认为在抓取部分存在一些问题，因为在抓取了几篇文章（5-6）所需的字段（日期、标题和内容）之后，它只给出了日期和标题，没有内容。

import time
import csv
import requests
from bs4 import BeautifulSoup
from bs4.element import Tag
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

base = 'https://www.smh.com.au'
browser = webdriver.Safari(executable_path='/usr/bin/safaridriver')
wait = WebDriverWait(browser, 10)
browser.get('https://www.smh.com.au/search?text=cybersecurity')

while True:
    try:
        time.sleep(2)
        show_more = wait.until(EC.element_to_be_clickable((By.CLASS_NAME, '_3we9i')))
        show_more.click()
    except Exception as e:
            print(e)
            break

soup = BeautifulSoup(browser.page_source,'lxml')
anchors = soup.find_all('a', {'tabindex': '-1'})
for anchor in anchors:
    browser.get(base + anchor['href'])
    sub_soup = BeautifulSoup(browser.page_source, 'html.parser')
    dateTag = sub_soup.find('time', {'class': '_2_zR-'})
    titleTag = sub_soup.find('h1', {'itemprop': 'headline'})
    contentTag = sub_soup.find_all('div', {'class': '_1665V undefined'})

    date = None
    title = None
    content = None

    if isinstance(dateTag, Tag):
        date = dateTag.get_text().strip()

    if isinstance(titleTag, Tag):
        title = titleTag.get_text().strip()

    if isinstance(contentTag, list):
        content = []
        for c in contentTag:
            content.append(c.get_text().strip())
        content = ' '.join(content)

    print(f'{date}\n {title}\n {content}\n')

    time.sleep(3)  


browser.close()

为什么这段代码在几篇文章之后就停止提供内容部分？我不明白。

谢谢。

Answer 1

因为You've reached your monthly free access limit 就是显示几页后网页上显示的消息。