Python实现爬取百度贴吧帖子所有楼层图片的爬虫示例

#coding=utf-8import reimport requestsimport urllibfrom bs4 import BeautifulSoupimport timetime1=time.time()def getHtml(url):  page = requests.get(url)  html =page.text  return htmldef getImg(html):  soup = BeautifulSoup(html, 'html.parser')  img_info = soup.find_all('img', class_='BDE_Image')  global index  for index,img in enumerate(img_info,index+1):    print ("正在下载第{}张图片".format(index))    urllib.urlretrieve(img.get("src"),'C:/pic4/%s.jpg' % index)def getMaxPage(url):  html = getHtml(url)  reg = re.compile(r'max-page="(/d+)"')  page = re.findall(reg,html)  page = int(page[0])  return pageif __name__=='__main__':  url  = "https://tieba.baidu.com/p/5113603072"  page = getMaxPage(url)  index = 0  for i in range(1,page):    url = "%s%s" % ("https://tieba.baidu.com/p/5113603072?pn=",str(i))    html = getHtml(url)    getImg(html)  print ("OK!All DownLoad!")  time2=time.time()  print u'总共耗时：' + str(time2 - time1) + 's'