import socket
import string

s = socket.socket()
host = socket.gethostname()
port = 21345
s.bind((host, port))
s.listen()

while True:
    (connection, addr) = s.accept()
    print('Verbindung von ', addr)
    msg = 'Server sagt Hallo'
    connection.send(msg.encode('utf-8'))
    msg = connection.recv(1024)
    msg = (msg.decode('utf-8')).upper()
    connection.send(msg.encode('utf-8'))
    #msg = msg.decode('utf-8')
    #print(msg)
    connection.close()