```
def findMinAndMax(L): if len(L) == 0: return (None, None) else: min = L[0] max = L[0]
for value in L: if value < min: min = value if value > max: max = value return (min, max) ```python
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孤獨的风舞者
```
def findMinAndMax(L): if len(L) == 0: return (None, None) else: min = L[0] max = L[0]