Python urlopen 使用小示例

yangjizhong24

一、打开一个网页获取所有的内容from urllib import urlopendoc = urlopen("http://www.baidu.com").read()print doc二、获取Http头from urllib import urlopendoc = urlopen("http://www.baidu.com")print doc.info()print doc.info().getheader('Content-Type')三、使用代理1. 查看环境变量print ""n".join(["%s=%s" % (k, v) for k, v in os.environ.items()])print os.getenv("http_proxy")2. 设置环境变量import os os.putenv("http_proxy", "http://proxyaddr:<port>")3. 使用代理# Use http://www.someproxy.com:3128 for http proxyingproxies = {'http': 'http://www.someproxy.com:3128'}filehandle = urllib.urlopen(some_url, proxies=proxies)# Don't use any proxiesfilehandle = urllib.urlopen(some_url, proxies={})# Use proxies from environment - both versions are equivalentfilehandle = urllib.urlopen(some_url, proxies=None)filehandle = urllib.urlopen(some_url)详细出处参考：http://www.jb51.net/article/15720.htm 
 
 
#实现图片下载   import urllib   url = r"http://www.iteye.com/images/logo.gif"  path = r"h:\downloads\1.jpg"  data = urllib.urlopen(url).read()   f = file(path,"wb")   f.write(data)   f.close()