>>> dir(list)
['__add__', '__class__', '__contains__', '__delattr__', '__delitem__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__gt__', '__hash__', '__iadd__', '__imul__', '__init__', '__init_subclass__', '__iter__', '__le__', '__len__', '__lt__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__reversed__', '__rmul__', '__setattr__', '__setitem__', '__sizeof__', '__str__', '__subclasshook__', 'append', 'clear', 'copy', 'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort']
（1）append（）#

>>> classmates = ['张三','李四','王五','赵六']

>>> classmates.append('xiaozuanfeng')
>>> classmates
['张三', '李四', '王五', '赵六', 'xiaozuanfeng']

(2)clear()#删除列表内所有元素

>>> classmates
['张三', '李四', '王五', '赵六', 'xiaozuanfeng']
>>> classmates.clear()
>>> classmates
[]

（3）未完待续........