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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_close_matches(word, possibilities, n=None, cutoff=0.6):
 """Overrides `difflib.get_close_match` to controle argument `n`."""

    if n is None:
        n = settings.num_close_matches
    return difflib_get_close_matches(word, possibilities, n, cutoff)