def pick(seq, func, maxobj=None):
    """Picks the object obj where func(obj) has the highest value."""
    maxscore = None
    for obj in seq:
        score = func(obj)
        if maxscore is None or maxscore < score:
            (maxscore, maxobj) = (score, obj)
    return maxobj
Picks the object obj where func(obj) has the highest value.
pdfminer/utils.py