Question

Write and test a python program to demonstrate TCP server and client connections. The client sends a Message containing the 10 float numbers (FloatNumber[]) , and then server replies with a message containing maximum, minimum, and average of these numbers.

Answer 1

Server.py

import socket

HOST = '127.0.0.1'  # Standard loopback interface address (localhost)
PORT = 65432        # Port to listen on (non-privileged ports are > 1023)

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.bind((HOST, PORT))
    s.listen()
    conn, addr = s.accept()
    with conn:
        # Recieve data from client.
        data = conn.recv(4096)

         # Decode the data.  
        data_decoded = data.decode("utf-8")
        array_strings = data_decoded.split(" ")
        # Convert the recieved data to float array.
        array = [float(i) for i in array_strings]
        # Find max, min, average of data.
        max_number = max(array)
        min_number = min(array)
        average = (sum(array))/(len(array))

        # Convert result into string and encode it into bytes to send to client.
        result = "Max : " + str(max_number) + " Min: " + str(min_number) + " Average: " + str(average)
        result_encoded = result.encode()
        # Send encoded result to client.
        conn.sendall(result_encoded) 

Client.py

import socket

HOST = '127.0.0.1'  # The server's hostname or IP address
PORT = 65432        # The port used by the server

print("Enter 10 float numbers")

array = [x for x in input().split()]

# Convert the FloatNumber[] to string, encode it and sent it to server.
array_string = " ".join(array)
array_encoded = array_string.encode()

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    # Connect to server.
    s.connect((HOST, PORT))
    # Send data to server.
    s.sendall(array_encoded)
    # Receive data from server.
    data = s.recv(4096)

print(data.decode())

Output -

Start both server and client in two separate terminals.

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