Python urlopen 使用小示例
一、打开一个网页获取所有的内容from urllib import urlopen
doc = urlopen("http://www.baidu.com").read()
print doc
二、获取Http头
from urllib import urlopen
doc = 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 proxying
proxies = {'http': 'http://www.someproxy.com:3128'}
filehandle = urllib.urlopen(some_url, proxies=proxies)
# Don't use any proxies
filehandle = urllib.urlopen(some_url, proxies={})
# Use proxies from environment - both versions are equivalent
filehandle = urllib.urlopen(some_url, proxies=None)
filehandle = urllib.urlopen(some_url)
详细出处参考：http://www.iyunv.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()
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