美丽的汤：刮表数据

Question

我想从下面的URL中提取表数据。具体来说，我想在第一列中提取数据。当我运行下面的代码时，第一列中的数据会重复多次。如何让值只显示在表格中显示一次？

from urllib.request import urlopen
from bs4 import BeautifulSoup
html = urlopen('http://www.pythonscraping.com/pages/page3.html').read()
soup = BeautifulSoup(html, 'lxml')
table = soup.find('table',{'id':'giftList'})

rows = table.find_all('tr')

for row in rows:
    data = row.find_all('td')
    for cell in data:
        print(data[0].text)

Answer 1

试试这个：

from urllib.request import urlopen
from bs4 import BeautifulSoup
html = urlopen('http://www.pythonscraping.com/pages/page3.html').read()
soup = BeautifulSoup(html, 'lxml')
table = soup.find('table',{'id':'giftList'})

rows = table.find_all('tr')

for row in rows:
    data = row.find_all('td')

    if (len(data) > 0):
        cell = data[0]
        print(cell.text)

Answer 2

将requests模块与selectors结合使用，您也可以尝试以下方法：

import requests
from bs4 import BeautifulSoup

link = 'http://www.pythonscraping.com/pages/page3.html'

soup = BeautifulSoup(requests.get(link).text, 'lxml')
for table in soup.select('table#giftList tr')[1:]:
    cell = table.select_one('td').get_text(strip=True)
    print(cell)

输出：

Vegetable Basket
Russian Nesting Dolls
Fish Painting
Dead Parrot
Mystery Box