Binary Star server, using core class in Python

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"""
Binary Star server, using bstar reactor

Author: Min RK <moc.liamg|krnimajneb#moc.liamg|krnimajneb>
"""

import sys

import zmq

from bstar import BinaryStar

def echo(socket, msg):
"""Echo service"""
socket.send_multipart(msg)

def main():
# Arguments can be either of:
# -p primary server, at tcp://localhost:5001
# -b backup server, at tcp://localhost:5002
if '-p' in sys.argv:
star = BinaryStar(True, "tcp://*:5003", "tcp://localhost:5004")
star.register_voter("tcp://*:5001", zmq.ROUTER, echo)
elif '-b' in sys.argv:
star = BinaryStar(False, "tcp://*:5004", "tcp://localhost:5003")
star.register_voter("tcp://*:5002", zmq.ROUTER, echo)
else:
print ("Usage: bstarsrv2.py { -p | -b }\n")
return

star.start()

if __name__ == '__main__':
main()