Custom user-agent with urllib2, python 2.7 - python-2.7

Question

I have the following code to add a custom user-agent to my urllib2
self.url_target = (self.EntryText.get()) #it gets the url from a tkinter entry widget
self.request = urllib2.Request(self.url_target)
self.request.addheaders = [('User-agent', 'Mozilla/5.0')]
self.req = urllib2.urlopen(self.request)
Now a silly question. I would like to check if the user-agent is correct passed. How do I do this? By calling self.req.read() or self.req.info() I can't see the browser user agent.
For example, here below what I see from google.com. How can I check if the user-agent passed is python2.7 or my custom user agent
Date: Wed, 27 Aug 2014 11:50:41 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html; charset=ISO-8859-1
Set-Cookie: PREF=ID=59cfdae71ba9d583:FF=0:TM=1409140241:LM=1409140241:S=22PjpHkFs493PNKQ; expires=Fri, 26-Aug-2016 11:50:41 GMT; path=/; domain=.google.it
Set-Cookie: NID=67=gOPu9-bAzk01ceW2ukTfpixWIIEl2TRUHKwfDAh5AU6ee-GTXoxBMAHbK6keLCXA5oG_R-9KhPVQ6wMScI28qf-dxqBPOLi66maz_QbBkXtkTpsUcVu-Yohg5-T8w8xz; expires=Thu, 26-Feb-2015 11:50:41 GMT; path=/; domain=.google.it; HttpOnly
P3P: CP="This is not a P3P policy! See http://www.google.com/support/accounts/bin/answer.py?hl=en&answer=151657 for more info."
Server: gws
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
Alternate-Protocol: 80:quic
Connection: close
Thank you

Answer 1

Call this url - http://httpbin.org/headers
The source code will have your user agent. :-)
You can embedd this in your code as you want.
However for now all I want to show here in the code below is that this url will let you know your user agent,
stuff=urllib2.urlopen("http://httpbin.org/headers").read()
print stuff
{
"headers": {
"Accept-Encoding": "identity",
"Connection": "close",
"Host": "httpbin.org",
"User-Agent": "Python-urllib/2.7",
"X-Request-Id": "43jhc13b-3dj4-4eb5-8780-ad7cfs4790cd"
}
}
Hope that answers your question