if L == []: return (None, None) min=L[0] max=L[0] for x in L: if x <= min: min = x if x >= max: max = x return (min, max)
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风庭水轩
if L == []: return (None, None) min=L[0] max=L[0] for x in L: if x <= min: min = x if x >= max: max = x return (min, max)