#!/usr/bin/env python 
# -*- coding:utf-8 -*-
#python全局变量必须在函数调用的时候用global声明为全局变量
#局部变量直接定义就行
sum = 1
def product(*x):
    global sum
    for i in x:
        sum = sum * i
    return sum
count = product(1,2,3)
print(count)