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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def print_port(self, stream=sys.stdout):
 """ Print port this EPC server runs on. As Emacs client reads port number from STDOUT, you need to call this just before calling :meth:`serve_forever`. :type stream: text stream :arg stream: A stream object to write port on. Default is :data:`sys.stdout`. """

        stream.write(str(self.server_address[1]))
        stream.write("\n")
        stream.flush()