Cyclically writes the dictionary key, value, and deletes the specified key-value pair:
The original text 'jp_url.txt' has each line element separated by a comma:
host_key,product_id,product_name,cont_start,cont_end ,100002,read in the palm of one's hand,bookId=,&startChapterId ,100002,read in the palm of one's hand,bid=,& ,100002,read in the palm of one's hand,&bid=,&cid ,100002,read in the palm of one's hand,readbook/,/ ,100003,banner,bookId=,&chapterId ,100003,banner,bid/,/cid
Want to get:
{‘100002'：‘product_name'.......}
The code is as follows:
def makeDict():
fileRead=open('jp_url.txt','rb')
lines=()
read_dict={}#define dictionary
for line in lines:
line_list=(',')# Each line is a comma-separated list
id=line_list[1]# Fetch the id
name=line_list[2]# Fetch the name
read_dict[id]=name# Here the key generates a key-value pair, where key is id
read_dict.pop('product_id')# Delete key-value pairs with key 'product_id'
return read_dict
read_dict=makeDict()
Cyclic writing of one key to multiple values:
where format {key: [value1, value2, ...]}
The text txt format is as follows:
guaguashipinliaotianshi|., guaguashipinliaotianshi|, guaguashipinliaotianshi|., jiuxiumeinvzhibo|., nbazhibo|., youbo|,
The first column of the name has a duplicate want a name corresponds 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=('|')
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)#Here the key adds value(host) to the key(name) already in the dictionary.
else:
host_dict.setdefault(name,[]).append(host)# Create a dictionary in the format {name, [host]}value as a list.
return host_dict
host_dict=makehostDict()
print host_dict
The above example of the usage of this Python dictionary loop to add multiple values to a key is all that I have shared with you, I hope it will give you a reference, and I hope you will support me more.