def findMinAndMax(L): if len(L) == 0: return (None, None) mymax = L[0] mymin = L[0] for x in L: if x > mymax: mymax = x; if x < mymin: mymin = x return (mymin, mymax)
findMinAndMax([]) 报错呢
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夜空中最不亮的恒星
def findMinAndMax(L): if len(L) == 0: return (None, None) mymax = L[0] mymin = L[0] for x in L: if x > mymax: mymax = x; if x < mymin: mymin = x return (mymin, mymax)