if L == []:
return (None,None)
else:
max =min = L[0]
for i in range(len(L)):
if L[i] >= max:
max = L[i]
if L[i] <= min:
min = L[i]
i=i+1
return (min,max)
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耗子兽君
if L == []:
return (None,None)
else:
max =min = L[0]
for i in range(len(L)):
if L[i] >= max:
max = L[i]
else:
if L[i] <= min:
min = L[i]
i=i+1
return (min,max)