I want to add a new dictionary to a JSON file each time i run the code and then read and work with that data, but it's written like this on one line:
{"userid": "person_1", "password": "67890", "name": "person1", "age": "21", "email": "gmail"}{"userid": "person_2", "password": "12345", "name": "person2", "age": "19", "email": "gmail"}
I want to write each dictionary in a newline or separate them in another way because I can't read them and convert them to a python dictionary in this way, here is the code:
To write on json file:
users = {"userid": username, "password": password,
"name": name, "age": age, "email": email}
with open("users.json", "a") as f:
json.dump(users, f)
and to read them, it gives me an error:
with open("users.json",'r') as f:
usersinfo = json.load(f)
Write each json to a new line
with open("users.json", "a") as f:
f.write(json.dumps(users) + '\n')
Related
So far, I have this code (with help from a tutorial):
import csv, json
csvFilePath = "convertcsv.csv"
jsonFilePath = "newResult.json"
# Read the CSV and add the data to a dictionary...
data = {}
with open(csvFilePath) as csvFile:
csvReader = csv.DictReader(csvFile)
for csvRow in csvReader:
data = csvRow
# Write data to a JSON file...
with open(jsonFilePath, "w") as jsonFile:
jsonFile.write(json.dumps(data, indent=4))
My desired output is this:
{
"userID": "string",
"username": "string",
"age": "string",
"location": {
"streetName": "string",
"streetNo": "string",
"city": "string"
}
}
I don't know how to represent the "location".
My actual result is this:
{
"userID": "string",
"username": "string",
"age": "string",
"location/streetName": "string",
"location/streetNo": "string",
"location/city": "string",
}
How can I seperate streetName, streetNo and city and put them into "location"?
Below is a simple script should do what you want. The result will be a json object with the "userID" as keys. Note that, to test deeper nesting, I used a csv file with slightly different headers - but it will work just as well with your original example.
import csv, json
infile = 'convertcsv.csv'
outfile = 'newResult.json'
data = {}
def process(header, value, record):
key, other = header.partition('/')[::2]
if other:
process(other, value, record.setdefault(key, {}))
else:
record[key] = value
with open(infile) as stream:
reader = csv.DictReader(stream)
for row in reader:
data[row['userID']] = record = {}
for header, value in row.items():
process(header, value, record)
with open(outfile, "w") as stream:
json.dump(data, stream, indent=4)
INPUT:
userID,username,age,location/street/name,location/street/number,location/city
0,AAA,20,This Street,5,This City
1,BBB,42,That Street,5,That City
2,CCC,34,Other Street,5,Other City
OUTPUT:
{
"0": {
"userID": "0",
"username": "AAA",
"age": "20",
"location": {
"street": {
"name": "This Street",
"number": "5"
},
"city": "This City"
}
},
"1": {
"userID": "1",
"username": "BBB",
"age": "42",
"location": {
"street": {
"name": "That Street",
"number": "5"
},
"city": "That City"
}
},
"2": {
"userID": "2",
"username": "CCC",
"age": "34",
"location": {
"street": {
"name": "Other Street",
"number": "5"
},
"city": "Other City"
}
}
}
I'd add some custom logic to achieve this, note that this is for the first level only, if you want more, you should create a recoursive function:
# Write data to a JSON file...
with open(jsonFilePath, "w") as jsonFile:
for i, v in data.items():
if '/' in i:
parts = i.split('/', 1)
data[parts[0]] = {parts[1]: v}
data.pop(i)
jsonFile.write(json.dumps(data, indent=4))
You can use something like this:
# https://www.geeksforgeeks.org/convert-csv-to-json-using-python/
import csv
import json
# Function to convert a CSV to JSON
# Takes the file paths as arguments
def make_json(csvFilePath, jsonFilePath):
# create a dictionary
data = {}
# Open a csv reader called DictReader
with open(csvFilePath, encoding='utf-8') as csvf:
csvReader = csv.DictReader(csvf)
# Convert each row into a dictionary
# and add it to data
for rows in csvReader:
# Assuming a column named 'No' to
# be the primary key
key = rows['No']
data[key] = rows
# Open a json writer, and use the json.dumps()
# function to dump data
with open(jsonFilePath, 'w', encoding='utf-8') as jsonf:
jsonf.write(json.dumps(data, indent=4))
# Driver Code
# Decide the two file paths according to your
# computer system
csvFilePath = r'Names.csv'
jsonFilePath = r'Names.json'
# Call the make_json function
make_json(csvFilePath, jsonFilePath)
For more information check out https://www.geeksforgeeks.org/convert-csv-to-json-using-python/
So I have a basic user.json file.
My question is: How can I add another dictionary to my JSON list?
So there is my code below, as you can see I tried this: append, update, insert, and I can't find any working result. The goal is to be able to add a new:
NAME: name1 // COUNTRY: coutry1 // GENDER: gender1... to the person JSON list....Thank you.
Python code
import json
with open("user.json") as f:
data = json.load(f)
new_dict = {"name": "name1",
"Country": "Country2",
"Gender": "Gender3"}
for person in data["person"]:
person.update(new_dict)
with open("user.json", "w") as f:
json.dump(data, f, indent=2)
user.json
{
"person": [
{
"name": "Peter",
"Country": "Montreal",
"Gender": "Male"
},
{
"name": "Alex",
"Country": "Laval",
"Gender": "Male"
},
{
"name": "Annie",
"Country": "Quebec",
"Gender": "Female"
},
{
"name": "Denise",
"Country": "Levis",
"Gender": "Female"
}
]
}
If you want to add another person object to the person list, all you have to go is to append the new object to the array of objects. You don't need to iterate over the person objects. Please check if my code below helps you:
with open("user.json") as f:
data = json.load(f)
new_dict = {"name": "name1",
"Country": "Country2",
"Gender": "Gender3"}
data["person"].append(new_dict)
with open("user.json", "w") as f:
json.dump(data, f, indent=2)
In the python code at person.update(new_dict), you are changing already existing entry person that will not add a new entry.
I have a json file saved in local server, such as：
{
"user": "user1",
"id": "21779"
}
and I want to write another dict into this json file, I need new content like this:
{
{
"user": "user1",
"id": "21779"
},
{
"user": "user2",
"id": "21780"
}
}
Or:
[
{
"user": "user1",
"id": "21779"
},
{
"user": "user2",
"id": "21780"
}
]
I try to use json.dump() to add the new element, but is displayed as:
{
"user": "user1",
"id": "21779"
}
{
"user": "user2",
"id": "21780"
}
It is not a valid json file.
How can I do use json.dump, json.load, or other methods?
Thanks for help me!
You have to read your JSON file and then convert it to list instead of dict. Then you just need to append to that list and overwrite your JSON file.
import json
data = json.load(open('data.json'))
# convert data to list if not
if type(data) is dict:
data = [data]
# append new item to data lit
data.append({
"user": "user2",
"id": "21780"
})
# write list to file
with open('data.json', 'w') as outfile:
json.dump(data, outfile)
You can do with the list not with the dict , try the below one solution if its help
import json
def appendList():
with open("test.json", mode='r', encoding='utf-8') as f:
feeds = json.load(f)
print(feeds)
with open("test.json", mode='w', encoding='utf-8') as feedsjson:
entry = { "user": "user3","id": "21574"}
feeds.append(entry)
print(json.dump(feeds, feedsjson))
I want to convert the data to a csv file with python json, after my run went well as the results below.
[{"id": "1", "name": "billy", "job": "web-develop"}, {"id": "1", "name": "smith", "job": "programming"}]
but none the less I think, how to separate json results based "," as shown below.
[{"id": "1", "name": "billy", "job": "web-develop"},
{"id": "1", "name": "smith", "job": "programming"}]
This myscript
import csv
import json
import sys
input = str(sys.argv[1])
csvfile = open(input, 'r')
fieldnames = ("id","name","job")
reader = csv.DictReader( csvfile, fieldnames)
out = json.dumps( [ row for row in reader ] )
sys.stdout.write(out)
I've been looking around the web and I cannot find a way on adding new JSON data to array.
Example: I would like to add player_two, player_three through python.
{
"players": {
"player_one": {
"name": "Bob",
"age": "0",
"email": "bob#example.com"
}
}
}
How can I achieve doing this through python?
What I've tried:
with open("/var/www/html/api/toons/details.json", 'w') as outfile:
json.dump(avatarDetails, outfile)
Here is a simple example, read the file as a dict, update the dict, then use json.dumps() to get the json data:
import json
# open your jsonfile in read mode
with open('jsonfile') as f:
# read the data as a dict use json.load()
jsondata = json.load(f)
# add a new item into the dict
jsondata['players']['player_two'] = {'email': 'kevin#example.com', 'name': 'Kevin', 'age': '0'}
# open that file in write mode
with open('jsonfile', 'w') as f:
# write the data into that file
json.dump(jsondata, f, indent=4, sort_keys=True)
Now the file looks like:
{
"players": {
"player_one": {
"age": "0",
"email": "bob#example.com",
"name": "Bob"
},
"player_two": {
"age": "0",
"email": "kevin#example.com",
"name": "Kevin"
}
}
}
Assuming that your file contains this JSON:
{
"players": {
"player_one": {
"name": "Bob",
"age": "0",
"email": "bob#example.com"
}
}
}
You can parse the data into a Python dictionary using json.load():
with open('/var/www/html/api/toons/details.json') as f:
data = json.load(f)
Add your new players:
data['players']['player_two'] = dict(name='Bobbie', age=100, email='b#blah.com')
data['players']['player_three'] = dict(name='Robert', age=22, email='robert#blah.com')
Then save it back to a file:
with open('/var/www/html/api/toons/details.json', 'w') as f:
json.dump(data, f)