使用 beautifulsoup 和 css 选择器而不是 lxml 和 xpath 来抓取特定元素前面的元素答案

【问题标题】：scrape element which is preceded by specific element using beautifulsoup and css selector instead of lxml and xpath使用 beautifulsoup 和 css 选择器而不是 lxml 和 xpath 来抓取特定元素前面的元素
【发布时间】：2020-08-24 08:23:18
【问题描述】：

我想从这个页面抓取“服务/产品”部分：https://www.yellowpages.com/deland-fl/mip/ryan-wells-pumps-20533306?lid=1001782175490

文本位于 dd 元素内，该元素始终位于该元素之后

服务/产品

我使用 lxml 和 xpath 创建了用于抓取此文本的代码：

import requests
from lxml import html

url = ""
headers = {'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:76.0) Gecko/20100101 Firefox/76.0'}
session = requests.Session()

r = session.get(url, timeout=30, headers=headers)
t = html.fromstring(r.content)

products = t.xpath('//dd[preceding-sibling::dt[contains(.,"Services/Products")]]/text()[1]')[0] if t.xpath('//dd[preceding-sibling::dt[contains(.,"Services/Products")]]') else ''

有没有什么方法可以使用 Beautifulsoup（如果可能的话，还有 css 选择器）而不是 lxml 和 xpath 来获取相同的文本？

【问题讨论】：

标签： python web-scraping beautifulsoup lxml

【解决方案1】：

尝试使用 BeautifulSoup 和 Requests。这要容易得多。这是一些代码

# BeautifulSoup is an HTML parser. You can find specific elements in a BeautifulSoup object
from bs4 import BeautifulSoup
from requests import get

url = "https://www.yellowpages.com/deland-fl/mip/ryan-wells-pumps-20533306?lid=1001782175490"


obj = BeautifulSoup(get(url).content, "html.parser")

# Gets the section with the Services
buisness_info = obj.find("section", {"id":"business-info"})

# Getting all <dd> elements (cause you can pick off the one you need from the list)
all_dd = buisness_info.find_all("dd")

# Finds the specific tag with the text you need
services_and_products = all_dd[2]

# Gets the text
text = services_and_products.text

# All Done
print(text)

【讨论】：

我不想按位置获取元素，all_dd[2] 在其他页面上不起作用，因为页面与页面的位置不同

【解决方案2】：

在你的页面上尝试这样的事情：

inf = soup.select_one('section#business-info dl')
target = inf.find("dt", text='Services/Products').nextSibling
for t in target.stripped_strings:
    print(t)

输出：

Pumps|Well Pumps|Residential Pumps|Water Pumps|Residential Pumps|Well Pumps|Residential Pumps|Commercial Pumps|Well Pumps|Pumps & Water Tanks|Residential & Commercial|Residential & Commercial|Water Tanks|Pump Maintenance|Pump Maintenance|Free Estimates|Service & Repair|Emergency Service Avail|Residential & Commercial|Service & Repair|Residential & Commercial|Pumps|Bonded|Insured|Water Tanks|Deep Wells|4 Wells|Pumps & Water Tanks 4'' Wells|2' - 12' Diameter Wells

【讨论】：