[英]How do I scrape data from URLs in a python-scraped list of URLs?
我正在嘗試在 Orange 中使用 BeautifulSoup4 從從同一網站抓取的 URL 列表中抓取數據。
當我手動設置 URL 時,我設法從單個頁面中抓取了數據。
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)
我已經能夠抓取我需要的 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, "html.parser")
rank = soup.find("table", 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'))
但到目前為止,我還無法將兩者結合起來從該 URL 列表中抓取數據。 我只能通過嵌套for
循環來做到這一點,如果可以,怎么做? 或者我該怎么做?
如果這是一個愚蠢的問題,我很抱歉,但我昨天才開始嘗試使用 Python 和 Web-Scraping,我無法通過咨詢類似的主題來解決這個問題。
假設您的兩個代碼塊都有效
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, "html.parser")
rank = soup.find("table", 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'):
url = url_list.get('href')
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)
這應該有效。 但是我在頁面的 DOM 中沒有看到類table-standings-body
的 table 元素。 可能是您應該更正元素選擇器。
嘗試:
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)
這將遍歷所有 URL 並將所有數據保存到data.csv
(來自 LibreOffice 的屏幕截圖):
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