將刮取的表格導出爲CSV

Question

我已經使用BeautifulSoup將這些表格在Python中的單個表格中進行了擦除。代碼如下：

import urllib2 
from bs4 import BeautifulSoup 
for i in range(0,39): 
    first=urllib2.urlopen("http://www.admision.unmsm.edu.pe/res20130914/A/011/"+str(i)+".html").read() 
    soup=BeautifulSoup(first) 
    for tr in soup.find_all('tr')[2:]: 
     tds = tr.find_all('td') 
     print tds[0].text, tds[1].text, tds[2].text, tds[3].text 

的結果是這樣的：

494560 ABAD SAAVEDRA, GERSON HORACIO 011 1116.8750 
455314 ABAD VALVERDE, MARIA ISABEL 011 1482.7500 
491005 ABREGU HUAMAN, MERCEDES LILIANA 011 503.4000 
457929 ACOSTA ABAD, ALEJANDRO FRANCISCO 011 413.0500 

所以，我怎麼能這個表導出爲CSV？

Answer 1

使用csv模塊：

import csv 
import urllib2 
from bs4 import BeautifulSoup 

with open('listing.csv', 'wb') as f: 
    writer = csv.writer(f) 
    for i in range(39): 
     url = "http://www.admision.unmsm.edu.pe/res20130914/A/011/{}.html".format(i) 
     u = urllib2.urlopen(url) 
     try: 
      html = u.read() 
     finally: 
      u.close() 
     soup=BeautifulSoup(html) 
     for tr in soup.find_all('tr')[2:]: 
      tds = tr.find_all('td') 
      row = [elem.text.encode('utf-8') for elem in tds[:4]] 
      writer.writerow(row)