用Python编写简单的微博爬虫

#-*-coding:utf8-*-

import re
import string
import sys
import os
import urllib
import urllib2
from bs4 import BeautifulSoup
import requests
from lxml import etree

reload(sys) 
sys.setdefaultencoding('utf-8')
if(len(sys.argv)>=2):
  user_id = (int)(sys.argv[1])
else:
  user_id = (int)(raw_input(u"请输入user_id: "))

cookie = {"Cookie": "#your cookie"}
url = 'http://weibo.cn/u/%d"mp"]')[0].attrib['value'])

result = "" 
urllist_set = set()
word_count = 1
image_count = 1

print u'爬虫准备就绪...'

for page in range(1,pageNum+1):

 #获取lxml页面
 url = 'http://weibo.cn/u/%d"ctt"]')
 for each in content:
  text = each.xpath('string(.)')
  if word_count>=4:
   text = "%d :"%(word_count-3) +text+"\n\n"
  else :
   text = text+"\n\n"
  result = result + text
  word_count += 1

 #图片爬取
 soup = BeautifulSoup(lxml, "lxml")
 urllist = soup.find_all('a',href=re.compile(r'^http://weibo.cn/mblog/oripic',re.I))
 first = 0
 for imgurl in urllist:
  urllist_set.add(requests.get(imgurl['href'], cookies = cookie).url)
  image_count +=1

fo = open("/Users/Personals/%s"%user_id, "wb")
fo.write(result)
word_path=os.getcwd()+'/%d'%user_id
print u'文字微博爬取完毕'

link = ""
fo2 = open("/Users/Personals/%s_imageurls"%user_id, "wb")
for eachlink in urllist_set:
 link = link + eachlink +"\n"
fo2.write(link)
print u'图片链接爬取完毕'


if not urllist_set:
 print u'该页面中不存在图片'
else:
 #下载图片,保存在当前目录的pythonimg文件夹下
 image_path=os.getcwd()+'/weibo_image'
 if os.path.exists(image_path) is False:
  os.mkdir(image_path)
 x=1
 for imgurl in urllist_set:
  temp= image_path + '/%s.jpg' % x
  print u'正在下载第%s张图片' % x
  try:
   urllib.urlretrieve(urllib2.urlopen(imgurl).geturl(),temp)
  except:
   print u"该图片下载失败:%s"%imgurl
  x+=1

print u'原创微博爬取完毕，共%d条，保存路径%s'%(word_count-4,word_path)
print u'微博图片爬取完毕，共%d张，保存路径%s'%(image_count-1,image_path)