from socket import *
serverPort = 12000
serverSocket = socket(AF_INET,SOCK_STREAM)
serverSocket.bind(('',serverPort))
serverSocket.listen(1)

while True:
     print('The server is waiting to receive ...')
     connectionSocket, addr = serverSocket.accept()
     data = connectionSocket.recv(50000)
     print("%d bytes received from the client" % (len(data)))
     connectionSocket.send(data)
     connectionSocket.close()