python 豆瓣采集

新手今天刚学python~~~ 有点凌乱~勉强看吧 只能算是给新手看看，见谅

简单版本的 豆瓣采集美图~~~~~~ 美女天天有 有木有~~~

python 3.4

sqlite3

BeautifulSoup 4.4

 from bs4 import BeautifulSoup
 import urllib.request
 import time,sched,os
 import sqlite3
 import sys

 #sys.exit()

 cx = sqlite3.connect('c:\\sqlite\\test.db')
 global cu
 cu=cx.cursor()
 cu.execute('select name from sqlite_master where type=\'table\' order by name;')
 for ds in cu.fetchall():
     #print(ds[0])
     if ds[0] != 'caiji':
         print("表不存在，开始创建")
         cu.execute("create table caiji (id INTEGER PRIMARY KEY AUTOINCREMENT,pid integer,nickname text NULL); ")
     else:
         print("存在")
         break
 #t=('grmlmgjsadf',)
 #cx.execute("insert into caiji(nickname) values(?)",t)
 #cx.commit()
 #cu.execute('select * from caiji where nickname=\''+'grmlmgjsadf'+'\'')
 #if cu.fetchall():
 #    print('dsa')

 #cu.close()
 #cx.close()

 path="d:\\imgs\\"
 ISOTIMEFORMAT='%Y%m%d'

 def dwonloadimg(uri):
     temp=time.strftime(ISOTIMEFORMAT, time.localtime())
     isexists=os.path.exists(path+temp)
     if not isexists:
         os.makedirs(path+temp)
     conn=urllib.request.urlopen(uri)
     pos=uri.rfind("/")
     name=uri[pos+1:]
     f=open(path+temp+'\\'+name,'wb')
     f.write(conn.read())
     conn.close()
     f.close()

 def Getarticle1(uri):
     res=urllib.request.urlopen(uri)
     html=res.read()
     res.close()
     str(html,'utf-8')
     bs=BeautifulSoup(html)
     imgs=bs.find_all('div',class_="topic-figure cc")
     for s in imgs:
         strc=s.find('img').attrs['src']
         print('图片：',strc)
         dwonloadimg(strc)
 def init():
     print('开始抓取')
     url="http://www.douban.com/group/haixiuzu/"
     temp=urllib.request.urlopen(url)
     html=temp.read()
     str(html,'utf-8')
     bs=BeautifulSoup(html)
     divs=bs.find_all('td',class_='title')
     for s in divs:
         uri=s.a["href"]
         #print(s.a.string,"\n",uri)
         cu.execute('select * from caiji where nickname=\''+uri+'\'')
         global cu
         if not cu.fetchall():
             print("新文章")
             cx.execute("insert into caiji(nickname) values(?)",(uri,))
             cx.commit()
             Getarticle1(uri)
        # else:
         #    print("文章存在")
     print("结束")

 while True:
     init()
     time.sleep(60)