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import socket
import sys
import time
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
addr = ('localhost', int(sys.argv[1]))
buf = "this is a ping!".encode('utf-8')
while True:
print("pinging...", file=sys.stderr)
sock.sendto(buf, ("127.0.0.1", int(sys.argv[1])))
time.sleep(1)
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