In order to see the client/server interactions, launch the following server script in one console:

$ python 1_13a_echo_server.py --port=9900 
Starting up echo server  on localhost port 9900 
    
Waiting to receive message from client 
  

Now, run the client from another Terminal as follows:

$ python 1_13b_echo_client.py --port=9900 
Connecting to localhost port 9900 
Sending Test message. This will be echoed 
Received: Test message. Th 
Received: is will be echoe 
Received: d 
Closing connection to the server
  

Upon receiving the message from the client, the server will also print something similar to the following message:

Data: Test message. This will be echoed 
sent Test message. This will be echoed 
bytes back to ('127.0.0.1', 42961) 
Waiting to receive message from client