[Tutor] Basic telnet question

[Phil]

Thank you for reading this.

If I enter the following at the prompt:

$ telnet localhost 7356

The client then responds with:

Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.

I'd like to do the same from Python. My code is as follows:

import telnetlib

tn = telnetlib.Telnet("127.0.0.1", 7356)
print(tn.read_all())

Then, once a connection is established send the character "f"

tn.write("f" + "\n")
print(tn.read_all())

The problem is that the client is not responding, certainly not as 
expected. There aren't any Python errors either, however, the console is 
blocked until the client is disabled. If I then attempt a connection 
with the disabled client a Python connection refused error is displayed, 
as I would expect.

I have read the telnetlib document and searched for examples but I seem 
to be stuck on a very basic problem.

By the way, I'm using Python 3.5 under Linux.

-- 
Regards,
Phil