udp-server.py

import socket
import operator

# 'Converts' the string operator into a real operator
operators = { 
            "+": operator.add, 
            "-": operator.sub, '*' : operator.mul,
            '/' : operator.truediv,  
            '%' : operator.mod,
            '^' : operator.xor, 
            }

IP = "127.0.0.1"
PORT = 12000

socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
socket.bind((IP, PORT))

print('Server Listening At {}'.format(socket.getsockname()))

while True:
    messageBytes, address = socket.recvfrom(2048)
    messageString = messageBytes.decode('utf-8')
    print('Received from client {} : {}'.format(address, messageString))

    messageString = messageString.split(", ")
    a = messageString[0]
    b = messageString[1]
    operator = messageString[2]

    if a == 'X' or b == 'X' or operator == 'X':
        break

    result = operators[operator](int(a), int(b))


    socket.sendto(str(result).encode(), address)


print('Connection Closed')
socket.close()