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import socket
import sys
UDP_IP = "127.0.0.1"
if __name__ == "__main__":
alen = len(sys.argv)
if alen > 1:
port = int(sys.argv[1])
else:
port = 5005
sock = socket.socket(socket.AF_INET, # Internet
socket.SOCK_DGRAM) # UDP
sock.bind((UDP_IP, port))
while True:
data, addr = sock.recvfrom(1024) # buffer size is 1024 bytes
print "received message:", data
sock.sendto(data, addr)
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