python爬虫爬虫贴吧图片的实例

#!/usr/bin/python # coding:utf-8 # 实现一个简单的爬虫，爬取百度贴吧图片 import urllib import re # 根据url获取网页html内容 def getHtmlContent(url): page = urllib.urlopen(url) return page.read() # 从html中解析出所有jpg图片的url # 百度贴吧html中jpg图片的url格式为：<img ... src="XXX.jpg" width=...> def getJPGs(html): # 解析jpg图片url的正则 jpgReg = re.compile(r'<img.+?src="(.+?\.jpg)" width') # 解析出jpg的url列表 jpgs = re.findall(jpgReg,html) return jpgs # 用图片url下载图片并保存成制定文件名 def downloadJPG(imgUrl,fileName): urllib.urlretrieve(imgUrl,fileName) # 批量下载图片，默认保存到当前目录下 def batchDownloadJPGs(imgUrls,path = './'): # 用于给图片命名 count = 1 for url in imgUrls: downloadJPG(url,''.join([path,'{0}.jpg'.format(count)])) count = count + 1 # 封装：从百度贴吧网页下载图片 def download(url): html = getHtmlContent(url) jpgs = getJPGs(html) batchDownloadJPGs(jpgs) def main(): url = 'http://tieba.baidu.com/p/2256306796' download(url) if __name__ == '__main__': main()