列表、元组、字典是python中重要的三个数据类型（我是这么认为的），一个一个来吧
列表（list）：可以在列表中添加、删除、修改元素
>>>namelist = ["Tom","Jhon","Smith"] //长度为3个元素
>>>print namelist
["Tom","Jhon","Smith"]
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>>>namelist.append("Linda") //在namelist追加元素到末尾
>>>print namelist
["Tom","Jhon","Smith","Linda"]
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>>>namelist.pop() //删除namelist末尾的元素
"Linda"
>>>print namelist
["Tom","Jhon","Smith"]
>>>namelist.pop(1) //删除列表指定位置的元素,列表索引从0开始，若是-1表示逆向索引，从-1开始
'Jhon'
>>>print namelist
["Tom","Smith"]
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>>>classlist = ["one","two"]
>>>namelist = ["Linda","Tom",classlist,"Jhon"] //相当于包含一个列表的二维列表
>>>print namelist
["Linda","Tom",["one","two"],"Jhon"]
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