A Telnet client in Python

The Telnet client is a simple command-line program that is used to connect to socket servers and exchange messages. The following is an example of how to use Telnet to connect to https://www.google.com and fetch the homepage:

$ telnet www.google.com 80

This command will connect to www.google.com on port 80.

$ telnet www.google.com 80
Trying 74.125.236.69...
Connected to www.google.com.
Escape character is '^]'

Now that it is connected, the Telnet command can take user input and send it to the respective server, and whatever the server replies will be displayed in the terminal. For example, send the HTTP GET command in the following format and hit Enter twice:

GET / HTTP/1.1

Sending this will generate a response from the server. Now we will make a similar Telnet program. The program is simple: we will implement a program that takes user input and fetches results from the remote server in parallel using the threads. One thread will keep receiving messages from...