無法使用 BeautifulSoup 解析 Google 搜索結果頁面

Question

我在 python 中使用來自 bs4 的 BeautifulSoup 解析網頁。 當我檢查 google 搜索頁面的元素時，這是第一個結果的部門：

因為它有class = 'r'我寫了這段代碼：

import requests
site = requests.get('https://www.google.com/search?client=firefox-b-d&ei=CLtgXt_qO7LH4-EP6LSzuAw&q=%22narendra+modi%22+%\22scams%22+%\22frauds%22+%\22corruption%22+%22modi%22+-lalit+-nirav&oq=%22narendra+modi%22+%\22scams%22+%\22frauds%22+%\22corruption%22+%22modi%22+-lalit+-nirav&gs_l=psy-ab.3...5077.11669..12032...5.0..0.202.2445.1j12j1......0....1..gws-wiz.T_WHav1OCvk&ved=0ahUKEwjfjrfv94LoAhWy4zgGHWjaDMcQ4dUDCAo&uact=5')
from bs4 import BeautifulSoup
page = BeautifulSoup(site.content, 'html.parser')
results = page.find_all('div', class_="r")
print(results)

但是命令提示符只返回[]

可能出了什么問題以及如何糾正它？

另外， 這是網頁。

編輯 1：我通過添加標題字典相應地編輯了我的代碼，但結果是相同的[] 。 這是新代碼：

import requests
headers = {
    'User-Agent' : 'Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0'
}
site = requests.get('https://www.google.com/search?client=firefox-b-d&ei=CLtgXt_qO7LH4-EP6LSzuAw&q=%22narendra+modi%22+%22cams%22+%22frauds%22+%22corruption%22+%22modi%22+-lalit+-nirav&oq=%22narendra+modi%22+%22scams%22+%22frauds%22+%22corruption%22+%22modi%22+-lalit+-nirav&gs_l=psy-ab.3...5077.11669..12032...5.0..0.202.2445.1j12j1......0....1..gws-wiz.T_WHav1OCvk&ved=0ahUKEwjfjrfv94LoAhWy4zgGHWjaDMcQ4dUDCAo&uact=5', headers = headers)
from bs4 import BeautifulSoup
page = BeautifulSoup(site.content, 'html.parser')
results = page.find_all('div', class_="r")
print(results)

注意：當我告訴它打印整個頁面時，沒有問題，或者當我使用list(page.children) ，它工作正常。

Answer 1

某些網站需要設置User-Agent標頭以防止來自非瀏覽器的虛假請求。 但是，幸運的是有一種方法可以將標頭傳遞給請求

# Define a dictionary of http request headers
headers = {
  'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0'
} 

# Pass in the headers as a parameterized argument
requests.get(url, headers=headers)

注意：可以在此處找到用戶代理列表

Answer 2

>>> give_me_everything = soup.find_all('div', class_='yuRUbf')
Prints a bunch of stuff.
>>> give_me_everything_v2 = soup.select('.yuRUbf')
Prints a bunch of stuff.

請注意，您不能執行以下操作：

>>> give_me_everything = soup.find_all('div', class_='yuRUbf').text
AttributeError: You're probably treating a list of elements like a single element.

>>> for all in soup.find_all('div', class_='yuRUbf'):
    print(all.text)
Prints a bunch of stuff.

代碼：

from bs4 import BeautifulSoup
import requests

headers = {
    'User-agent':
    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko)"
    "Chrome/70.0.3538.102 Safari/537.36 Edge/18.19582"
}

html = requests.get('https://www.google.com/search?q="narendra modi" "scams" "frauds" "corruption" "modi" -lalit -nirav', headers=headers)
soup = BeautifulSoup(html.text, 'html.parser')

give_me_everything = soup.find_all('div', class_='yuRUbf')
print(give_me_everything)

---

或者，您可以使用來自 SerpApi 的Google Search Engine Results API做同樣的事情。 這是一個付費 API，可免費試用 5,000 次搜索。

主要區別在於，當某些東西不起作用時，您不必提供不同的解決方案，因此不必維護解析器。

集成代碼：

from serpapi import GoogleSearch

params = {
  "api_key": "YOUR_API_KEY",
  "engine": "google",
  "q": 'narendra modi" "scams" "frauds" "corruption" "modi" -lalit -nirav',
}

search = GoogleSearch(params)
results = search.get_dict()

for result in results['organic_results']:
    title = result['title']
    link = result['link']
    displayed_link = result['displayed_link']
    print(f'{title}\n{link}\n{displayed_link}\n')

----------
Opposition Corners Modi Govt On Jay Shah Issue, Rafael ...
https://www.outlookindia.com/website/story/no-confidence-vote-opposition-corners-modi-govt-on-jay-shah-issue-rafael-deals-c/313790
https://www.outlookindia.com

Modi, Rahul and Kejriwal describe one another as frauds ...
https://www.business-standard.com/article/politics/modi-rahul-and-kejriwal-describe-one-another-as-frauds-114022400019_1.html
https://www.business-standard.com
...

免責聲明，我為 SerpApi 工作。