if L == []:
return (None, None)
min = max = L[0]
for i in L[1:]:
if i > max:
max = i
elif i < min:
min = i
else:
pass
return (min,max)
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冰块ZJ
if L == []:
return (None, None)
min = max = L[0]
for i in L[1:]:
if i > max:
max = i
elif i < min:
min = i
else:
pass
return (min,max)