我如何使用beautifulsoup从网站的表格中获取多个信息

我想这就是您的预期输出：

import requests
from bs4 import BeautifulSoup

res = requests.get("https://www.fda.gov/Safety/Recalls/")
soup = BeautifulSoup(res.text, "lxml")

for item in soup.select("table td"):
    if "Undeclared" in item.text:
        brand = item.find_parents()[0].select("td")[1].text
        reason = item.text
        print(brand,reason)

部分输出：

N/A   Undeclared Milk
Colorado Nut Company and various other private labels   Undeclared milk
All Natural, Weis, generic   Undeclared milk
Dilettante Chocolates   Undeclared almonds
Hot Pockets   Undeclared egg, milk, soy, and wheat
Figiâs   Undeclared Milk
Germack   Undeclared Milk

当您还想获得到品牌名称的链接时，可以执行以下操作：

import requests
from bs4 import BeautifulSoup
from urllib.parse import urljoin

url = "https://www.fda.gov/Safety/Recalls/"
res = requests.get(url)
soup = BeautifulSoup(res.text, "lxml")

for item in soup.select("table td"):
    if "Undeclared" in item.text:
        brand = item.find_parents()[0].select("td")[1].text
        brand_link = urljoin(url,item.find_parents()[0].select("td")[1].select("a")[0]['href'])
        reason = item.text
        print("Brand: {}\nBrand_link: {}\nReason: {}\n".format(brand,brand_link,reason))

输出：

Brand: N/A  
Brand_link: https://www.fda.gov/Safety/Recalls/ucm587012.htm
Reason: Undeclared Milk