from socket import *
clientSocket = socket(AF_INET, SOCK_DGRAM)
serverName = #IP
serverPort = 9090

message = str.encode(input('Input your lowercase message:'))
clientSocket.sendto(message, (serverName,serverPort))
modifiedMessage, serverAddr = clientSocket.recvfrom(2048)
print (modifiedMessage)
clientSocket.close()

from socket import *
serverPort = 9090
serverSocket = socket(AF_INET, SOCK_DGRAM)
serverSocket.bind(('', serverPort))
print ('The server is ready for the message')

while True:
    message, clientAddr = serverSocket.recvfrom(2048)
    modifiedMessage = message.upper()
    serverSocket.sendto(modifiedMessage, clientAddr)