使用Python3.x抓取58同城（南京站）的演出票的信息

 #!/usr/bin/env python
 #-*-coding: utf-8 -*-
 import re
 import urllib.request as request
 from bs4 import BeautifulSoup as bs
 import csv
 import os
 import sys
 from imp import reload
 reload(sys)
 
 def GetAllLink():
     num = int(input("爬取多少页:>"))
     if not os.path.exists('./data/'):
         os.mkdir('./data/')
 
     for i in range(num):
         if i+1 == 1:
             url = 'http://nj.58.com/piao/'
             GetPage(url, i)
         else:
             url = 'http://nj.58.com/piao/pn%s/' %(i+1)
             GetPage(url, i)
 
 def GetPage(url, num):
     Url = url
     user_agent = 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:32.0) Gecko/20100101 Firefox/32.0'
     headers = { 'User-Agent' : user_agent }
     req = request.Request(Url, headers = headers)
     page = request.urlopen(req).read().decode('utf-8')
     soup = bs(page, "html.parser")
     table = soup.table
     tag = table.find_all('tr')
     # 提取出所需的那段
     soup2 = bs(str(tag), "html.parser")
     title = soup2.find_all('a','t')         #标题与url
     price = soup2.find_all('b', 'pri')      #价格
     fixedprice = soup2.find_all('del')      #原价
     date = soup2.find_all('span','pr25')    #时间 
 
     atitle = []
     ahref = []
     aprice = []
     afixedprice = []
     adate = []
 
     for i in title:
         #print i.get_text(), i.get('href')
         atitle.append(i.get_text())
         ahref.append(i.get('href'))
     for i in price:
         #print i.get_text()
         aprice.append(i.get_text())
     for i in fixedprice:
         #print j.get_text()
         afixedprice.append(i.get_text())
     for i in date:
         #print i.get_text()
         adate.append(i.get_text())
 
     csvfile = open('./data/ticket_%s.csv'%num, 'w')
     writer = csv.writer(csvfile)
     writer.writerow(['标题','url','售价','原价','演出时间'])
     '''
     每个字段必有title，但是不一定有时间date
     如果没有date日期，我们就设为'---'
     '''
     if len(atitle) > len(adate):
         for i in range(len(atitle) - len(adate)):
             adate.append('---')
         for i in range(len(atitle) - len(afixedprice)):
             afixedprice.append('---')
         for i in range(len(atitle) - len(aprice)):
             aprice.append('---')
 
     for i in range(len(atitle)):
             message = atitle[i]+'|'+ahref[i]+'|'+aprice[i]+ '|'+afixedprice[i]+'|'+ adate[i]
             writer.writerow([i for i in str(message).split('|')])
     print ("[Result]:> 页面 %s 信息保存完毕!"%(num+1))
     csvfile.close()
 
 if __name__ == '__main__':
     GetAllLink()

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