Wie schreibe ich mehrere Werte mit einem Schlüssel in das Python-Wörterbuch?

host_key,product_id,product_name,cont_start,cont_end
ah2.zhangyue.com,100002,掌阅,bookId=,&startChapterId
ih2.ireader.com,100002,掌阅,bid=,&
www.ireader.com,100002,掌阅,&bid=,&cid
m.zhangyue.com,100002,掌阅,readbook/,/
c13.shuqireader.com,100003,书旗,bookId=,&chapterId
t.shuqi.com,100003,书旗,bid/,/cid
想要得到：
{‘100002’：‘product_name’.......}

def makeDict():
    fileRead=open('jp_url.txt','rb')
    lines=fileRead.readlines()
    read_dict={}#定义字典
    for line in lines:
        line_list=line.split(',')#每行按逗号分隔成列表
        id=line_list[1]#取到id
        name=line_list[2]#取到name
        read_dict[id]=name#此处关键产生键值对，其中key是id
    read_dict.pop('product_id')#删除key为‘product_id’的键值对
    return read_dict
read_dict=makeDict()

def makehostDict():
    host_dict={}
    f_allhost=open('xml_host.txt','rb')
    lines=f_allhost.readlines()
    for line in lines:
        line_list=line.split('|')
        name=line_list[0]
        host=line_list[1].strip('\n')
        if host is not '':
            if  host_dict.has_key(name):
                host_dict.get(name).append(host)#此处为关键向字典里已经有的key(name)值后继续添加value(host)
            else:
                host_dict.setdefault(name,[]).append(host)#创建{name，[host]}value为列表的格式的字典。
    return host_dict
host_dict=makehostDict()
print host_dict