为什么return sun*1.0/len(args)要除len（args）？
def average(*args):
sum = 0.0
if len (args) == 0:
return sum
for x in args:
sum += x
return sun*1.0/len(args)
print average()
print average(1, 2)
print average(1, 2, 2, 3, 4)
Paimon_ssr
2019-08-30
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