[Tutor] Beginner: Socket object and packets

[Marc Eymard]

Hi tutor,

I am trying to locate the first blank line in the first received packet 
when pinging an internet server using a socket object.

My assumption is there will be a mandatory blank line right after the 
http headers in accordance with the http protocol.

Consider the following:

import socket
mysock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
mysock.connect( ('www.py4inf.com/code/', 80) )
mysock.send('GET http://www.py4inf.com/code/' + ' HTTP/1.0\n\n')
data_str = mysock.recv(700)

My question:

Why is the following statement False when there is an actual blank line 
in the received packet:
     '\n\n' in data

The statement 'any_string in data' works fine with any character except 
the double line drop i.e. '\n\n'.

Attached full script for your consideration.

Thanks in advance for your guidance,
Marc