问题描述
我正在尝试在 Orange 中使用 BeautifulSoup4 从从同一网站抓取的 URL 列表中抓取数据。
当我手动设置 URL 时,我设法从单个页面中抓取了数据。
from urllib.request import urlopen
from bs4 import BeautifulSoup
import requests
import csv
import re
url = "https://data.ushja.org/awards-standings/zone-points.aspx?year=2021&zone=1§ion=1901"
req = requests.get(url)
soup = BeautifulSoup(req.text,"html.parser")
rank = soup.find("table",class_="table-standings-body")
for child in rank.children:
print(url,child)
并且我已经能够抓取我需要的 URL 列表
from urllib.request import urlopen
from bs4 import BeautifulSoup
import requests
import csv
import re
url = "https://data.ushja.org/awards-standings/zones.aspx?year=2021&zone=1"
req = requests.get(url)
soup = BeautifulSoup(req.text,class_="table-standings-body")
link = soup.find('div',class_='contentSection')
url_list = link.find('a').get('href')
for url_list in link.find_all('a'):
print (url_list.get('href'))
但到目前为止,我还无法将两者结合起来从该 URL 列表中抓取数据。我只能通过嵌套 for
循环来做到这一点,如果可以,怎么做?或者我该怎么做?
如果这是一个愚蠢的问题,我很抱歉,但我昨天才开始尝试使用 Python 和 Web-Scraping,我无法通过咨询类似的主题来解决这个问题。
解决方法
试试:
import requests
import pandas as pd
from bs4 import BeautifulSoup
url = "https://data.ushja.org/awards-standings/zones.aspx?year=2021&zone=1"
req = requests.get(url)
soup = BeautifulSoup(req.text,"html.parser")
# get all links
url_list = []
for a in soup.find("div",class_="contentSection").find_all("a"):
url_list.append(a["href"].replace("§","§"))
# get all data from URLs
all_data = []
for url in url_list:
print(url)
req = requests.get(url)
soup = BeautifulSoup(req.text,"html.parser")
h2 = soup.h2
sub = h2.find_next("p")
for tr in soup.select("tr:has(td)"):
all_data.append(
[
h2.get_text(strip=True),sub.get_text(strip=True),*[td.get_text(strip=True) for td in tr.select("td")],]
)
# save data to CSV
df = pd.DataFrame(
all_data,columns=[
"title","sub_title","Rank","Horse / Owner","Points","Total Comps",],)
print(df)
df.to_csv("data.csv",index=None)
这会遍历所有 URL 并将所有数据保存到 data.csv
(来自 LibreOffice 的屏幕截图):