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'])

class Listinfo(object):
    def __init__(self,List):
        self.List=List

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

    def get_key(self,num):
        if not isinstance(num,int):
            return 'error'
        return self.List[num]

    def update_list(self,list_new):
        if not isinstance(list_new,list):
            return 'error'
        self.List.extend(list_new)
        return self.List

    def del_key(self):
        return self.List.pop()


List=[44,222,111,333,454,'sss','333']
list_2=Listinfo(List)

print list_2.add_key(5)
print list_2.get_key(1)
print list_2.update_list([3,5])
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)

#!/use/bin/python
#-*- coding:UTF-8 -*-

class Setinfo(object):
    def __init__(self,set_info):
        self.set_info=set_info

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

    def get_intersection(self,unioninfo):
        if not isinstance(unioninfo,set):
            return 'error'
        return self.set_info&unioninfo

    def get_union(self,unioninfo):
        if not isinstance(unioninfo,set):
            return 'error'
        return set_info|unioninfo

    def del_difference(self,unioninfo):
        return self.set_info-unioninfo




if __name__=='__main__':
    set_info=set(['WR','FE',4,6])

    set_2=Setinfo(set_info)
    print set_2.add_setinfo(3)
    
    set_3=set([5,6])
    print set_2.get_intersection(set_3)

    set_4=set([5,6])
    print set_2.get_union(set_4)

    set_5=set([5,6])
    print set_2.del_difference(set_5)