#!/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')  # 注：这里最后加一个'width'是为了提高匹配精确度# 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 = 1for 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()

#!/usr/bin/python
# coding:utf-8
# 实现一个简单的爬虫，爬取百度贴吧图片
import requests
import re# 根据url获取网页html内容
def getHtmlContent(url):page = requests.get(url)return page.text# 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')  # 注：这里最后加一个'width'是为了提高匹配精确度# 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):# 可自动关闭请求和响应的模块from contextlib import closingwith closing(requests.get(imgUrl,stream = True)) as resp:with open(fileName,'wb') as f:for chunk in resp.iter_content(128):f.write(chunk)# 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 = 1for url in imgUrls:downloadJPG(url,''.join([path,'{0}.jpg'.format(count)]))print '下载完成第{0}张图片'.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()