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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 get_best_match(text_log_error):
 """ Get the best TextLogErrorMatch for a given TextLogErrorMatch. Matches are further filtered by the score cut off. """

    score_cut_off = 0.7
    return (text_log_error.matches.filter(score__gt=score_cut_off)
                                  .order_by("-score", "-classified_failure_id")
                                  .select_related('classified_failure')
                                  .first())