没有类BS4 python的刮擦表

Question

我有以下代码试图从一个表中抓取数据，该表没有来自具有许多其他不必要表的网页的类。

from bs4 import BeautifulSoup
import urllib2
import re
wiki = "http://www.maditssia.com/members/list.php?p=1&id=Engineering%20Industries"
header = {'User-Agent': 'Mozilla/5.0'}
req = urllib2.Request(wiki,headers=header)
page = urllib2.urlopen(req)
soup = BeautifulSoup(page)
title = ""
address = ""
contact = ""
phone = ""
description=""
email=""
table = soup.find("table")
#print table.text
#print re.sub(r'\s+',' ',''.join(table.text).encode('utf-8'))
for row in table.findAll("tr"):
   cells = row.findAll("td")
   if len(cells) >= 7:
    title = cells[0].find(text=True)
    address = cells[1].find(text=True)
    contact = cells[2].find(text=True)
    phone = cells[3].find(text=True)
    email= cells[4].find(text=True)
    description= cells[5].find(text=True)
    data = title + "," + address + "," + contact + "," + phone + "\n"
    print data

我正在尝试遍历表行和单元格以拆分它们并保存每个 td 数组，以便我的输出不会被弄乱。现在下面的代码不显示任何数据。网页的 HTML 结构对我来说很难解析。

我想要的输出是

Accurate Engineers | S.BALASUNDAR | Kadir Complex,4/153-1,Thilagar St. Melamadai Main Roa+D5d, D37Thasildhar Nagar,Madurai - 625 020 | 2520049,RE:2534603,98652-40049   | accurate_engineers@yahoo.co.in | Mfg.and Export of Machine for Mfg of Match Box   

Answer 1

您要提取的信息<table>位于class具有 value 属性的元素下tableborder，因此您可以从那里开始搜索。然后使用css选择器选择要提取的数据的每个位置<tr>和<td>位置。

一个例子python3：

from bs4 import BeautifulSoup
import urllib.request as urllib2

wiki = "http://www.maditssia.com/members/list.php?p=1&id=Engineering%20Industries"
header = {'User-Agent': 'Mozilla/5.0'}
req = urllib2.Request(wiki,headers=header)
page = urllib2.urlopen(req)
soup = BeautifulSoup(page)

for table in soup.find_all('table', attrs={'class': 'tableborder'}):
    data = []
    data.append(table.select('tr:nth-of-type(1) > td:nth-of-type(2)')[0].string or '') 
    data.append(table.select('tr:nth-of-type(1) > td:nth-of-type(4)')[0].string or '') 
    data.append(table.select('tr:nth-of-type(2) > td:nth-of-type(2)')[0].string or '') 
    data.append(table.select('tr:nth-of-type(2) > td:nth-of-type(6)')[0].string or '') 
    data.append(table.select('tr:nth-of-type(3) > td:nth-of-type(6)')[0].string or '') 
    data.append(table.select('tr:nth-of-type(4) > td:nth-of-type(2)')[0].string or '') 
    print(' | '.join(data))

像这样运行它：

python3 script.py

这产生：

Aali Industries | A.Yobu | 1, Ayyanar Koil 4th Street Sellur Madurai - 625 002 | 2530132,9345204255,9345204256 | aaliyobu@yahoo.com | 
Accurate Engineers, | S.BALASUNDAR | Kadir Complex,4/153-1,Thilagar St. Melamadai Main Road, Thasildhar Nagar | 2520049,RE:2534603,98652-40049 | accurate_engineers@yahoo.co.in | 
Akber Ali Industries | S. Abuthalif | 73/15/1, East Anna Thoppu Street Madurai - 625 001  | 2343526,2341100 |  | 
Alagu Wire Products | Rm.Meiyappan | 193/4-A, Trichy Road Pudukottai - 2  | 236624,98424-44624,98428-44624 |  | 
Allwin Fasetners | S.Joseph Vasudevan | XXXXX6,Parasakthi Nagar XXXXXXXXAvaniapuram XXXXXXXMadurai - 625 012. | 2670577 |  | 
Allwinraj Metals Centre, | P.SELVARAJ NADAR | 180 and 181 East Veli Street, Madurai - 625 001.  | 2622181, RES:2626914 |  | 
Amirtham Engineering Works | G.Amirtharaj | 7A,Govindan Chetty Street, Simmakkal, Madurai - 625 001. | 2622417 |  | 
Amudha Wire Products, | A.M.P. Shanmugavel | Swahath Residency C-1, 3rd Floor, 708-A, 17th East Street, Anna Nagar | 6534939,99449-55199 |  | 
Ananthasiva Engg.Works, | P.KALUVAN | 19-B New Ramnad Road, Madurai - 625 009.  | 2337434,RES:2532598,2311910 | 98421-22200 | 
Angalamman Industries, | Palanivel | 40/C, Chinnandan Koil Road, Near Angalamman Koil, Karur - 639 001. | NIL |  |