Python爬虫实现获取动态gif格式搞笑图片的方法示例

#!/usr/bin/python#coding:utf-8import urllib2,time,uuid,urllib,os,sys,refrom bs4 import BeautifulSoupreload(sys)sys.setdefaultencoding('utf-8')#获取页面内容def getHtml(url):    try:        print url        html = urllib2.urlopen(url).read()#.decode('utf-8')#解码为utf-8    except:        return    return html#获取动图所代表的url列表def getImagUrl(html):    if not html:        print 'nothing can be found'        return    ImagUrlList=[]    soup=BeautifulSoup(html,'lxml')    #获取item列表    items=soup.find("div",{"class":"main"}).find_all('div',{'class':'item'})    for item in items:        target={}        #通过if语句，过滤广告项        if item.find('div',{"class":"text"}):            #获取url            imgurl=item.find('div',{"class":"text"}).find('img').get('src')            target['url']=imgurl            #获取名字            target['name']=item.find('h3').text            ImagUrlList.append(target)    return ImagUrlList#下载图片到本地def download(author,imgurl,typename,pageNo):    #定义文件夹的名字    x = time.localtime(time.time())    foldername = str(x.__getattribute__("tm_year"))+"-"+str(x.__getattribute__("tm_mon"))+"-"+str(x.__getattribute__("tm_mday"))    download_img=None    picpath = 'Jimy/%s/%s/%s' % (foldername,typename,str(pageNo))    filename = author+str(uuid.uuid1())    pic_type=imgurl[-3:]    if not os.path.exists(picpath):        os.makedirs(picpath)    target = picpath+"/%s.%s" % (filename,pic_type)    print "动图存贮位置:"+target    download_img = urllib.urlretrieve(imgurl, target)#将图片下载到指定路径中    print "图片出处为："+imgurl    return download_img#退出函数def myquit():    print "Bye Bye!"    exit(0)def start(pageNo):    targeturl="http://www.zbjuran.com/dongtai/list_4_%s.html" % str(pageNo)    html = getHtml(targeturl)    urllist=getImagUrl(html)    for imgurl in urllist:        download(imgurl['name'],imgurl['url'],'搞笑动图',pageNo)if __name__ == '__main__':    print '''            *****************************************            **  Welcome to Spider of GIF     **            **   Created on 2017-3-16      **            **   @author: Jimy         **            *****************************************'''    pageNo = raw_input("Input the page number you want to scratch (1-50),please input 'quit' if you want to quit/n/请输入要爬取的页面，范围为（1-100），如果退出，请输入Q>/n>")    while not pageNo.isdigit() or int(pageNo) > 50 or int(pageNo) < 1:        if pageNo == 'Q':            myquit()        print "Param is invalid , please try again."        pageNo = raw_input("Input the page number you want to scratch >")    print pageNo    start(pageNo)    #第一次爬取结束    pageNo = raw_input("Input the page number you want to scratch (1-50),please input 'quit' if you want to quit/n/请输入总共需要爬取的页面，范围为（1-5000），如果退出，请输入Q>/n>")    while not pageNo.isdigit() or int(pageNo) > 5000 or int(pageNo) < 1:        if pageNo == 'Q':            myquit()        print "Param is invalid , please try again."        pageNo = raw_input("Input the page number you want to scratch >")    #循环遍历，爬取多页    for num in xrange(int(pageNo)):        start(str(num+1))