This is a simple Python example that shows how to use TCP sockets for network communication between a server and clients. The server listens for incoming connections from clients and handles each client in a separate thread. The client connects to the server and runs two threads to receive and send messages over the network. It consists of four Python files, server.py and client1.py, client2.py and client3.py that communicate with each other over a network using TCP sockets.

1. Clone the repository or download the files to your local.

2. In one terminal, run the server.py first.

python server.py

This will start the server and it will be ready to accept connections from clients (listen on 127.0.0.1:9999).

3. In the other terminal, run the client1.py, client2.py and client3.py.

python client1.py

This will start the client and it will connect to the server at 127.0.0.1:9999.

4. To communicate between clients, enter the messages in the console. The server will act as a mediator between clients by receiving messages from one client and sending them to another client.

The server.py creates a socket and binds it to a specific port number. It then listens for incoming connections from clients. When a client connects, it accepts the connection and each client is handled in a separate thread. Then, it starts a loop to receive messages from the client. And it sends back them to all clients(broadcast).

The client.py creates a socket and connects to the server using the server's IP address and port number. It starts a loop where it listens for incoming messages and user input continuously. It consists of two functions, send() and recv(), which run in separate threads to handle sending and receiving messages over the network.