There are 3 basic elements of client server system ->

1. Client -> Sends the request to server for resources
2. Server -> Sends the resources to client on the request
3. Socket -> Gateway for sending and recieving the request

To program this we have 4 basic steps ->

1. Server starts listening
2. Client sends the request to Server and connects to it
3. Server serves the request
4. When client sends "Over & Out" this system terminates from both sides

Server Side Code

1.setup the host

host = socket.gethostname()

2.setup the port

port = 3000

1. setup socket_instance & bind host and port

   server_socket = socket.socket()
   server_socket.bind((host,port))
   

4.set the server in listening mode

server_socket.listen()

5.make new connection

connection,address = server_socket.accept()

6.Till server gets data from client maintain connection with client and send client data

while(True):
        data = connection.recv(1024).decode()
        if not data:
                  break
        print("Message Recieved : " + str(data))
        connection.send("Recieved your data".encode())

7.After all work close the socket

connection.close()

Client Side Code

1.set up the host

host = socket.gethostname()

2.set up the port

port = 3000

3.make socket instance

client_socket = socket.socket()

4.connect to server at particular host and port

client_socket.connect((host,port))

5.custom message

message = input("Enter the message : ")

6.write and send message till client does not type bye

while(message.lower().strip() != 'bye'):
          client_socket.send(message.encode())
          data = client_socket.recv(1024).decode()
          print(f'Recieved : {data}')
          message = input("Enter the message : ")

7.close the socket

client_socket.close()

#FINAL CODE

from pydoc import cli
import socket
def client():
    host = socket.gethostname()
    port = 3000
    client_socket = socket.socket()
    client_socket.connect((host, port))
    message = input("Enter your message : ")
    while message.lower().strip() != 'over&out':
        client_socket.send(message.encode())
        data = client_socket.recv(1024).decode()
        print('Messge received from server: ' + data)
        message = input("Enter your next message : ")
    client_socket.close()
if __name__ == '__main__':
    client()

from pydoc import cli
import socket
def server():
    host = socket.gethostname()
    port = 3000
    server_socket = socket.socket()
    server_socket.bind((host, port))
    server_socket.listen()
    conn, address = server_socket.accept()
    print("Connected to: " + str(address))
    while True:
        data = conn.recv(1024).decode()
        if not data:
            break
        print("Recieved data : " + str(data))
        data = input('Enter the message for client : ')
        conn.send(data.encode())
    conn.close()

if __name__ == '__main__':
    server()

#Screenshots