Python获取web页面信息

 import sys, urllib2
 # req = urllib2.Request(sys.argv[1])
 req = urllib2.Request('http://www.sina.com.cn')
 fd = urllib2.urlopen(req)
 print "Retrieved", fd.geturl()
 info = fd.info()
 for key, value in info.items():
     print "%s = %s" % (key, value)

结果如下：

Retrieved http://www.sina.com.cn
content-length = 117199
x-cache = HIT from cnc.sy.1cf2.32.spool.sina.com.cn
x-powered-by = shci_v1.03
content-encoding = gzip
age = 3
expires = Mon, 28 Dec 2015 13:59:14 GMT
vary = Accept-Encoding
server = nginx
last-modified = Mon, 28 Dec 2015 13:57:24 GMT
connection = close
cache-control = max-age=60
date = Mon, 28 Dec 2015 13:58:14 GMT
content-type = text/html