How to write multiple values with one key in python dictionary?-Python Tutorial-php.cn

How to write multiple values with one key in python dictionary?

#How to write multiple values with one key in a python dictionary?

One-key multi-value writing method in python dictionary:

1. Loop to write dictionary key, value, and delete the specified key-value pair:

The original text 'jp_url.txt' elements in each line are separated by commas:

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’.......}

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The code is as follows:

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()

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2. Loop to write one-click to many values:

The format{key:[value1,value2,...]}

The text txt format is as follows:

guaguashipinliaotianshi| .guagua.cn,
guaguashipinliaotianshi|iguagua.net,
guaguashipinliaotianshi|.17guagua.com,
jiuxiumeinvzhibo|.69xiu.com,
nbazhibo|.estream.cn,
youbo|yb.sxsapp.com,

The names in the first column are repeated. If you want one name to correspond to multiple results, the code is as follows:

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

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