python - 使用 BeautifulSoup 抓取亚马逊网页

Question

我正在尝试抓取亚马逊的评论:https://www.amazon.com/Python-Crash-Course-Hands-Project-Based/dp/1593276036/ref=sr_1_3?ie=UTF8&qid=1541450645&sr=8-3&keywords=python

这是我的代码:

import requests as req
from bs4 import BeautifulSoup
headers = {'User-Agent': 'Kevin\'s_request'}
r = req.get('https://www.amazon.com/Python-Crash-Course-Hands-Project-Based/dp/1593276036/ref=sr_1_3?ie=UTF8&qid=1541450645&sr=8-3&keywords=python', headers=headers)
soup = BeautifulSoup(r.text, "html.parser")
soup.find(class_="a-expander-content a-expander-partial-collapse-content")

我最终只得到一个空列表。我在 Jupyter Notebooks 和 BS 4 中使用 Python 3.6.4

Answer 1

尝试这种方法。结果你的选择器找不到任何东西。不过，我已经修复了它以达到目的:

import requests
from bs4 import BeautifulSoup

def get_reviews(s,url):
    s.headers['User-Agent'] = 'Mozilla/5.0'
    response = s.get(url)
    soup = BeautifulSoup(response.text,"lxml")
    return soup.find_all("div",{"data-hook":"review-collapsed"})

if __name__ == '__main__':
    link = 'https://www.amazon.com/Python-Crash-Course-Hands-Project-Based/dp/1593276036/ref=sr_1_3?ie=UTF8&qid=1541450645&sr=8-3&keywords=python'    
    with requests.Session() as s:
        for review in get_reviews(s,link):
            print(f'{review.text}\n')