这是我第三天学python了， 想写一个东西纪念一下吧，于是写了一直爬虫，但是不是好的虫，只能讲网页的关键词存到本地， 但是我觉得基本上算是一只小虫了
文中用到了BeautifulSoup这个库， 目的是处理html文档分析的， 因为我只是提取了title的关键字，所以可以用正则表达式代替， 还有一个库是jieba， 这个库是中文分词的作用， 再有一个库是 chardet， 用来判断字符的编码， 本想多线程的， 但是自认为被搞糊涂了，就放弃了
?1. [代码][Python]代码 
#coding:utf-8
import re
import urllib
import urllib2
import sys
import time
import Queue 
import thread
import threading
import jieba
import chardet
from BeautifulSoup import BeautifulSoup as BS
 
 
DEEP = 1000
LOCK = threading.Lock()
PATH = "c:\\test\\"
urlQueue = Queue.Queue()
def pachong():
    url = ‘http://www.baidu.com‘
    return url
 
def getPageUrl(html):
    reUrl = re.compile(r‘<\s*[Aa]{1}\s+[^>]*?[Hh][Rr][Ee][Ff]\s*=\s*[\"\‘]?([^>\"\‘]+)[\"\‘]?.*?>‘)
    urls = reUrl.findall(html)
    for url in urls:
        if len(url) > 10:
            if url.find(‘javascript‘) == -1:
                urlQueue.put(url)
 
def getContents(url):
    try:
        url = urllib2.quote(url.split(‘#‘)[0].encode(‘utf-8‘), safe = "%/:=&?~#+!$,;‘@()*[]")
        req = urllib2.urlopen(url)
        res = req.read()
        code = chardet.detect(res)[‘encoding‘]
        #printhttp://www.huiyi8.com/donghua/?
        #print codeflash素材
        res = res.decode(str(code), ‘ignore‘)
        res = res.encode(‘gb2312‘, ‘ignore‘)
        code = chardet.detect(res)[‘encoding‘]
        #print code
        #print res
        return res
    except urllib2.HTTPError, e:
        print e.code
        return None
    except urllib2.URLError, e:
        print str(e)
        return None
     
def writeToFile(html, url):
    fp = file(PATH + str(time.time()) + ‘.html‘, ‘w‘)
    fp.write(html)
    fp.close()
     
     
def getKeyWords(html):
    code = chardet.detect(html)[‘encoding‘]
    if code == ‘ISO-8859-2‘:
        html.decode(‘gbk‘, ‘ignore‘).encode(‘gb2312‘, ‘ignore‘)
    code = chardet.detect(html)[‘encoding‘]
    soup = BS(html, fromEncoding="gb2312")
    titleTag = soup.title
    titleKeyWords = titleTag.contents[0]
    cutWords(titleKeyWords)
     
def cutWords(contents):
    print contents
    res = jieba.cut_for_search(contents)
    res = ‘\n‘.join(res)
    print res
    res = res.encode(‘gb2312‘)
    keyWords = file(PATH + ‘cutKeyWors.txt‘, ‘a‘)
    keyWords.write(res)
    keyWords.close()
     
def start():
     
    while urlQueue.empty() == False:
        url = urlQueue.get()
        html = getContents(url)
        getPageUrl(html)
        getKeyWords(html)
        #writeToFile(html, url)
 
         
if __name__ == ‘__main__‘:
    startUrl = pachong()
    urlQueue.put(startUrl)
    start()
     
    
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一只从百度开始不断搜索的小爬虫