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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 _append_pairs(new_pairs):
 """ Load the pairlist, add new stuff, save it out """

    desired_pairs = restore_pairs() or []
    desired_pairs += new_pairs
    print("Adding {} new pairs, queue has {} pairs".format(len(new_pairs), len(desired_pairs)))
    save_pairs(desired_pairs)