import socket
s = socket.socket()
host = socket.gethostname()
port = 1345
s.bind((host , port))
s.listen()
while True:
    (connection, addr )= s.accept()
    print('verbindung von', addr)
    msg= 'Danke für das vorbeischauen!'
    serge= s.recv(1024)
    message = serge.decode('utf-8')
    sendmessage= message.upper()
    connection.send(sendmessage.encode('utf-8'))
    connection.close()