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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 resendLast(self):
        "Resend the last sent packet due to a timeout."
        log.warning("Resending packet %s on sessions %s"
            % (self.context.last_pkt, self))
        self.context.metrics.resent_bytes += len(self.context.last_pkt.buffer)
        self.context.metrics.add_dup(self.context.last_pkt)
        sendto_port = self.context.tidport
        if not sendto_port:
            # If the tidport wasn't set, then the remote end hasn't even
            # started talking to us yet. That's not good. Maybe it's not
            # there.
            sendto_port = self.context.port
        self.context.sock.sendto(self.context.last_pkt.encode().buffer,
                                 (self.context.host, sendto_port))
        if self.context.packethook:
            self.context.packethook(self.context.last_pkt)