像这样做：
import mechanize
import urllib2
browser = mechanize.Browser()
# setup your header, add anything you want
header = {'User-Agent': 'Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20100101 Firefox/14.0.1', 'Referer': 'http://whateveritis.com'}
url = "http://google.com"
# wrap the request. You can replace None with the needed data if it's a POST request
request = urllib2.Request(url, None, header)
# here you go
response = browser.open(request)
print response.geturl()
print response.read()
response.close()
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