Update l3_distributedattackdetector.py

        LOGGER.info("Gracefully stopping...")

    def follow(self, file, time_sleep):

    def follow(self, logfile, time_sleep):

        """

        Generator function that yields new lines in a file

        Generator function that yields new lines in a log file

        """

        # seek the end of the file

        # file.seek(0, os.SEEK_END)

        # logfile.seek(0, os.SEEK_END)

        chunk = ""

        # start an infinite loop

        while True:

            # read last line of the file

            line = file.readline()

            line = logfile.readline()

            # sleep if the file hasn't been updated

            if not line: