def product(x, *y): #添加一个可选参数(可以为空)
for n in y:
x = x * n
return x
print('product(5) =', product(5))
print('product(5, 6, 7, 9) =', product(5, 6, 7, 9))
如果不给参数,你这个函数会报错啊
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def product(x, *y): #添加一个可选参数(可以为空)
for n in y:
x = x * n
return x
print('product(5) =', product(5))
print('product(5, 6, 7, 9) =', product(5, 6, 7, 9))