老王Python-进阶篇4-面向对象第二节

一、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'])

 1 class Listinfo(object):
 2     def __init__(self,List):
 3         self.List=List
 4 
 5     def add_key(self,keyname):
 6         if not isinstance(keyname,str) and not isinstance(keyname,int):
 7             return 'keyname must be a string or a list!'
 8         self.List.append(keyname)
 9         return self.List
10 
11     def get_key(self,num):
12         if not isinstance(num,int):
13             return 'error'
14         return self.List[num]
15 
16     def update_list(self,list_new):
17         if not isinstance(list_new,list):
18             return 'error'
19         self.List.extend(list_new)
20         return self.List
21 
22     def del_key(self):
23         return self.List.pop()
24 
25 
26 List=[44,222,111,333,454,'sss','333']
27 list_2=Listinfo(List)
28 
29 print list_2.add_key(5)
30 print list_2.get_key(1)
31 print list_2.update_list([3,5])
32 print list_2.del_key()

二、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)

 1 #!/use/bin/python
 2 #-*- coding:UTF-8 -*-
 3 
 4 class Setinfo(object):
 5     def __init__(self,set_info):
 6         self.set_info=set_info
 7 
 8     def add_setinfo(self,keyname):
 9         if not isinstance(keyname,str) and not isinstance(keyname,int):
10             return 'keyname must be a string or a int!'
11         self.set_info.add(keyname)
12         return set_info
13 
14     def get_intersection(self,unioninfo):
15         if not isinstance(unioninfo,set):
16             return 'error'
17         return self.set_info&unioninfo
18 
19     def get_union(self,unioninfo):
20         if not isinstance(unioninfo,set):
21             return 'error'
22         return set_info|unioninfo
23 
24     def del_difference(self,unioninfo):
25         return self.set_info-unioninfo
26 
27 
28 
29 
30 if __name__=='__main__':
31     set_info=set(['WR','FE',4,6])
32 
33     set_2=Setinfo(set_info)
34     print set_2.add_setinfo(3)
35     
36     set_3=set([5,6])
37     print set_2.get_intersection(set_3)
38 
39     set_4=set([5,6])
40     print set_2.get_union(set_4)
41 
42     set_5=set([5,6])
43     print set_2.del_difference(set_5)