定义一个函数，计算n个数的平均值。...................................
def ave(lst):
if len(lst) == 0:
return 0
return sum(lst)/len(lst)
lst = list(map(int,input().split()))
print(ave(lst))
def avg(*args: int):
s = 0
for i in args:
s += i
return s / len(args)
n = avg(1, 2, 7, 10)
print(n) # 5