def findMinAndMax(L):
if len(L)==0: #写成 if L is None: 显示IndexError: list index out of range ???
return (None,None)
else:
min1=L[0]
max1=L[0]
for i in L:
min1=min(min1,i)
max1=max(max1,i)
return (min1,max1)
>>> type(None)
<class 'NoneType'>
>>> type([])
<class 'list'>
啊这俩type还是不一样的
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VincyChan4231
def findMinAndMax(L):
if len(L)==0: #写成 if L is None: 显示IndexError: list index out of range ???
return (None,None)
else:
min1=L[0]
max1=L[0]
for i in L:
min1=min(min1,i)
max1=max(max1,i)
return (min1,max1)