为什么我这个代码的第一个输出是None，而不是0.0
def average(*args):
for x in args:
sum = 0.0
if len(args)==0:
return sum
else:
sum = sum + x
return sum / len(args)
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def average(*args):
for x in args:
sum = 0.0
if len(args)==0:
return sum
else:
sum = sum + x
return sum / len(args)
2019-07-13
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