面向对象第一节

#coding=utf-8

'''
定义一个列表的操作类：Listinfo

包括的方法:

1 列表元素添加: add_key(keyname)  [keyname:字符串或者整数类型]
2 列表元素取值：get_key(num) [num:整数类型]
3 列表合并：update_list(list)	  [list:列表类型]
4 删除并且返回最后一个元素：del_key()

list_info = Listinfo([44,222,111,333,454,'sss','333'])
'''
class Listinfo:
def __init__(self,List):
self.List = List

def add_key(self,keyname):
if not isinstance(keyname,str) and not isinstance(keyname,int):
return 'Added element must be a string or a list!'
self.List.append(keyname)

def get_key(self,num):
if not isinstance(num,int) or not num >= len(self.List) or not num <0 :
return 'arvg error'
print self.List[num]

def update_list(self,new_list):
if not isinstance(new_list,list):
return 'The argument must be a list of!'
self.List.update(new_list)

'''
定义一个集合的操作类：Setinfo

包括的方法:

1 集合元素添加: add_setinfo(keyname)  [keyname:字符串或者整数类型]
2 集合的交集：get_intersection(unioninfo) [unioninfo :集合类型]
3 集合的并集： get_union(unioninfo)[unioninfo :集合类型]
4 集合的差集：del_difference(unioninfo) [unioninfo :集合类型]

set_info =  Setinfo(你要操作的集合)
'''
class Setinfo:
def __init__(self,Set):
self.Set = Set

def add_setinfo(self,keyname):
if not isinstance(keyname,str) and not isinstance(keyname,int):
return 'Added element must be a string or a list!'
self.Set.add(keyname)

def get_intersection(self,unioninfo):
if not isinstance(unioninfo,set):
return 'Added element must be a set!'
print self.Set & unioninfo

def get_union(self,unioninfo):
if not isinstance(unioninfo,set):
return 'Added element must be a set!'
print self.Set | unioninfo

def del_difference(self,unioninfo):
if not isinstance(unioninfo,set):
return 'Added element must be a set!'
print self.Set - unioninfo