python 爬虫 (错误很多)

不怎么会用PYTHON写。。今天试了一下。

#!/usr/bin/python
# vim: set fileencoding=utf-8:
import sys
import urllib2
import re
import sqlite3
import hashlib
import random
from BeautifulSoup import BeautifulSoup


class SpriderUrl:
    # 初始化
    def __init__(self,url,domain_name):
        self.url=url
        self.domain_name=domain_name

    # 获得URL列表
    def getUrl(self):
        urls=[]
        # try:
        body_text=urllib2.urlopen(self.url).read()
        soup=BeautifulSoup(body_text)
        links=soup.findAll('a')
        # connect sqllite3
        md5_str=hashlib.md5(str(random.randint(1,100000))+"aa")
        print "data_name:"+md5_str.hexdigest()
        # create sqlite3 data name
        con=sqlite3.connect(md5_str.hexdigest()+".db")
        # create  sqlite3 table name
        con.execute("""create table url_data(id interger auto_increment primary key,url TEXT not null)""")
        for link in links:
            if re.match('(.*)://'+self.domain_name,link.get('href')):
                urls.append(link.get('href'))
                con.execute("insert into url_data(url)values('"+link.get('href')+"')")
                con.commit()
        while len(urls)>0:
            for url in urls:
                body_text2=urllib2.urlopen(url).read()
                soup2=BeautifulSoup(body_text2)
                links2=soup2.findAll('a')
                for link2 in links2:
                    if re.match('(.*)://'+self.domain_name,link2.get('href')):
                        test=link2.get('href')
                        cur=con.execute("select * from url_data where url='"+test+"'")
                        bool_itm=cur.fetchone()
                        if bool_itm is None:
                            urls.append(link2.get('href'))
                            con.execute("insert into url_data(url)values('"+test+"')")
                        else:
                            continue
                    else:
                        continue
        print "Done"


t=SpriderUrl('http://www.baidu.com/',"www.baidu.com")
t.getUrl()