发布于 2014-10-18 08:14:56 | 224 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Python3 官方中文指南,程序狗速度看过来!

Python编程语言

Python 是一种面向对象、解释型计算机程序设计语言,由Guido van Rossum于1989年底发明,第一个公开发行版发行于1991年。Python语法简洁而清晰,具有丰富和强大的类库。它常被昵称为胶水语言,它能够把用其他语言制作的各种模块(尤其是C/C++)很轻松地联结在一起。


本文是一个python实现的火车票转让信息采集器,采集信息来源是58同城和赶集网,程序不见得能成功运行,在家看一下思路吧,需要的朋友可以参考下

好吧,我承认我是对晚上看到一张合适的票转让但打过电话去说已经被搞走了这件事情感到蛋疼。直接上代码:

#coding: utf-8
'''
春运查询火车票转让信息

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):
  """
  开始抓取
  """
  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)
          # 只要卧铺!
          if url not in existed and u"卧" 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):
  """
  获得车次信息
  """
  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(?!时刻表)" % 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):
  """
  发送邮件
  """
  import smtplib
  from email.mime.text import MIMEText

  msgRoot = MIMEText(content, 'html', 'UTF-8')
  msgRoot['Subject'] = "[%s]有票来啦!!!!" % 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():
  """
  切换时区
  """
  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自动采集吧。



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