import socket

s = socket.socket ()
host = socket.gethostname()
port = 2345
s.bind((host,port))
s.listen()

while True:
    (connection , addr) = s.accept()
    print('verbindung von ',addr)
    #msg = 'Danke für das vorbeischauen!'
    bytes = connection.recv(1024)
    #msg = baba
    msg =bytes.decode('utf-8')
    #test = msg.upper()
    connection.send(msg.upper().encode('utf-8'))
    connection.close()