if len(L) == 0:
return (None, None)
min = L[0]
max = L[0]
for n in L:
if min > n:
min = n
if max < n:
max = n
return (min, max)
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Tim_Ho_
if len(L) == 0:
return (None, None)
min = L[0]
max = L[0]
for n in L:
if min > n:
min = n
if max < n:
max = n
return (min, max)