Hello World server in Python

#
# Hello World server in Python
# Binds REP socket to tcp://*:5555
# Expects b"Hello" from client, replies with b"World"
#

import time
import zmq

context = zmq.Context()
socket = context.socket(zmq.REP)
socket.bind("tcp://*:5555")

while True:
# Wait for next request from client
message = socket.recv()
print("Received request: %s" % message)

# Do some 'work'
time.sleep(1)

# Send reply back to client
socket.send(b"World")