#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2017/7/24 13:26
def hello(a,b):
    return a*b
c=hello(3,4)
print(c)

def change(mylist):
    mylist.append([1,2,3,4]);
    print(mylist)
    return
mylist = [10,20,30];
change(mylist)
print(mylist)
