python - 如何使用python从网站中的链接页面中提取数据

Question

我一直在尝试从网页中抓取数据以进行数据分析项目，并且成功地从单个页面中获取数据。

import requests
from bs4 import BeautifulSoup
import concurrent.futures
from urllib.parse import urlencode
from scraper_api import ScraperAPIClient


    client = ScraperAPIClient('key')
    results = client.get(url = "https://www.essex.ac.uk/course-search?query=&f.Level%7CcourseLevel=Undergraduate").text
    
    print(results)

对于来自网站“https://www.essex.ac.uk/course-search?query=&f.Level%7CcourseLevel=Undergraduate”的示例，我需要在每个课程中导航并从该页面获取一个称为持续时间的数据.

Answer 1

试试下面的：

client = ScraperAPIClient('key')
results = []
for i in range(10):
   results.append(client.get(url = f"https://www.essex.ac.uk/course-search?query=&f.Level%7CcourseLevel=Undergraduate&start_rank={i}1").text)
    
print(results)

循环浏览 10 个结果页面并将每个文本响应放入结果列表中

Answer 2

import requests
from bs4 import BeautifulSoup
import concurrent.futures
from urllib.parse import urlencode
from scraper_api import ScraperAPIClient

client = ScraperAPIClient('key')
total_pages = 12
for page_no in range(total_pages):
    # you control this page_no variable.
    # go to the website and see how the api go to the next page
    # it depends on the 'start_rank' at the end of the URL
    # for example start_rank=10, start_rank=20 will get you one page after another
    rank = page_no * 10
    results = client.get(url="https://www.essex.ac.uk/course-search?query=&f.Level%7CcourseLevel=Undergraduate&start_rank={0}".format(rank)).text
    print(results)