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這篇文章主要介紹了python實現的一個火車票轉讓信息采集器,采集信息來源是58同程或者趕集網,需要的朋友可以參考下。

#coding: utf-8

'''

春運查詢火車票轉讓信息

author: piglei2007@gmail.com

date: 2011.01.25

'''

import re

import os

import time

import urlparse

import datetime

import traceback

import urllib2

import socket

socket.setdefaulttimeout(20)

blank_re = re.compile(r\s+)

opener = urllib2.build_opener(urllib2.httpcookieprocessor())

opener.addheaders = [

  (user-agent, mozilla/5.0 (x11; u; freebsd i386; en-us; rv:1.9.1) gecko/20090704 firefox/3.5),

  (accept, */*),

]

urllib2.install_opener(opener)

from beautifulsoup import beautifulsoup

source = {

  58: http://bj.58.com/huochepiao/?num=%(train)s&starttime=%(date)s00,

  ganji: http://bj.ganji.com/piao/cc_%(train)s/%(date)s/,

}

record_file = /tmp/ticket_records.txt

def parse_record():

  try:

    return set([x.strip() for x in open(record_file, r).readlines()])

  except ioerror:

    open(record_file, w)

    return set()

def flush_record(records):

  open(record_file, w).write(\n.join(records))

def main(config):

  開始抓取

  existed = parse_record()

  to_email = []

  for train in config[trains]:

    for date in config[dates]:

      for type, _url in source.items():

        url = _url % dict(train=train, date=date)

        content = urllib2.urlopen(url).read()

        soup = beautifulsoup(content)

        result = parse_content(type, soup, train)

        for url, text in result:

          url = urlparse.urljoin(_url, url)

          # 只要臥鋪！

          if url not in existed and u臥 in text:

            to_email.append([text, url])

          existed.add(url)

  if to_email:

    content = .join(

      [x for x in [ | .join(y) for y in to_email]]

    ).encode(utf-8)

    simple_mail(config[people], content)

  flush_record(existed)

def parse_content(type, soup, train):

  獲得車次信息

  result = []

  if type == 58:

    info_table = soup.find(table, id=infolist)

    if info_table:

      for x in info_table.findall(tr, text=re.compile(ur%s(?!時刻表) % train, re.i)):

        a = x.parent

        _text = blank_re.sub(, a.text)

        result.append([a[href], _text])

  if type == ganji:

    for x in soup.findall(dl, {class: list_piao}):

      a = x.dt.a

      result.append([a[href], a.text])

  return result

email_host = 'smtp.sohu.com'

email_host_user = 'yourname@sohu.com'

email_host_password = 'yourpassword'

email_port = 25

def simple_mail(to, content):

  發送郵件

  import smtplib

  from email.mime.text import mimetext

  msgroot = mimetext(content, 'html', 'utf-8')

  msgroot['subject'] = [%s]有票來啦！！！！ % datetime.datetime.today().isoformat( )

  msgroot['from'] = email_host_user

  msgroot['to'] = , .join(to)

  s = smtplib.smtp(email_host, email_port)

  s.login(email_host_user, email_host_password)

  s.sendmail(email_host_user, to, msgroot.as_string())

  s.close()

def switch_time_zone():

  切換時區

  os.environ[tz] = asia/shanghai

  time.tzset()

switch_time_zone()

if __name__ == '__main__':

  config = {

    trains: (k471,),

    dates: (20110129,),

    people: (

      youremail@sohu.com,

    )

  }

  try:

    main(config)

    print %s: ok % datetime.datetime.today()

  except exception, e:

    print traceback.format_exc()然后放入cron，你懂的。