How to decode the gzip compressed data returned in a HTTP Response in python?

I have created a client/server architecture in python, I take HTTP request from the client which is served by requesting another HTTP server through my code.

When I get the response from the third server I am not able to decode the gzip compressed data, I first split the response data using \r\n as separation character which got me the data as the last item in the list then I tried decompressing it with

zlib.decompress(data[-1]) 

but it is giving me an error of incorrect headers. How should I go with this problem ?

Code

client_reply = ''
                 while 1:
                     chunk = server2.recv(512)
                     if len(chunk) :
                         client.send(chunk)
                         client_reply += chunk
                     else:
                         break
                 client_split = client_reply.split("\r\n")
                 print client_split[-1].decode('zlib')

I want to read the data that is been transferred between the client and the 2nd server.