python中urllib和urllib2不同的调试方法

import urllib, httplib
httplib.HTTPConnection.debuglevel = 1
urllib.urlopen(http://google.com)

import urllib2
handler=urllib2.HTTPHandler(debuglevel=1)
opener = urllib2.build_opener(handler)
urllib2.install_opener(opener)
request = urllib2.Request(url,headers,data)