Set item using data['id'] = ....
import json
with open('data.json', 'r+') as f:
data = json.load(f)
data['id'] = 134 # <--- add `id` value.
f.seek(0) # <--- should reset file position to the beginning.
json.dump(data, f, indent=4)
f.truncate() # remove remaining part
Top answer 1 of 7
127
Set item using data['id'] = ....
import json
with open('data.json', 'r+') as f:
data = json.load(f)
data['id'] = 134 # <--- add `id` value.
f.seek(0) # <--- should reset file position to the beginning.
json.dump(data, f, indent=4)
f.truncate() # remove remaining part
2 of 7
53
falsetru's solution is nice, but has a little bug:
Suppose original 'id' length was larger than 5 characters. When we then dump with the new 'id' (134 with only 3 characters) the length of the string being written from position 0 in file is shorter than the original length. Extra chars (such as '}') left in file from the original content.
I solved that by replacing the original file.
import json
import os
filename = 'data.json'
with open(filename, 'r') as f:
data = json.load(f)
data['id'] = 134 # <--- add `id` value.
os.remove(filename)
with open(filename, 'w') as f:
json.dump(data, f, indent=4)
Reddit
reddit.com › r/learnpython › editing json files
r/learnpython on Reddit: editing json files
May 3, 2025 -
i dont really know how to edit json files with python, and I've got a list in a json file that id like to add things to/remove things from. how do I do so?
How do I edit .json data with python? - Stack Overflow
So I'm making a Discord bot and I need to edit some data in my .json file Here's the json file: "name"'s variable is player I want to edit the balance, there's gonna be a command to add ... More on stackoverflow.com
(absolute beginner) how do I run a Python script & how do I edit JSON?
Hi guys, This is properly easy to do but i have no idea how to do it. So I downloaded something from GitHub that is supposed to help me find codes on a websites. The instructions are following: After running edit: $HOME/.config/crunchyroll-guest-pass-finder/accounts.json The JSON file is an ... More on forum.freecodecamp.org
3
0
June 20, 2020Modify JSON - what is the best approach?
Both ways would work. Hard to say without knowing the specifics, although working directly in dictionary would be my first approach. More on reddit.com
3
1
March 19, 2021editing json files
Use the json module to load the JSON into a Python data structure. Make your changes to that, then use the json module to write it out back to the file. https://docs.python.org/3/library/json.html More on reddit.com
3
1
May 3, 202503:30
How to Work with JSON Data in Python | Parse, Read & Write JSON ...
20:34
Python Tutorial: Working with JSON Data using the json Module - ...
Modify JSON file with Python
06:32
JSON Python tutorial: what is JSON and how to parse JSON data with ...
03:33
Using python to update your json file - YouTube
Top answer 1 of 3
4
I got the solution after a lot testing and searching.
The correct code is
with open('filename.json', 'r') as f:
json_data = json.load(f)
json_data['some_id'][0]['embed'] = 'Some string'
with open('filename.json', 'w') as f:
json.dump(json_data, f, indent=2)
It neither duplicate any data nor delete any existing data just change. OMG I got it finally.
2 of 3
4
json_data becomes a dictionary with the same structure as your JSON. To access 'inner' elements, you just have to navigate the dictionary structure.
See comment below.
with open('filename.json', 'r') as f:
json_data = json.load(f)
json_data['some_id'][0]['embed'] = 'Some string' # On this line you needed to add ['embed'][0]
with open('filename.json', 'w') as f:
json.dump(json_data, f, indent=2)
ItSolutionstuff
itsolutionstuff.com › post › how-to-modify-json-file-in-pythonexample.html
How to Modify JSON File in Python? - ItSolutionstuff.com
October 30, 2023 - There are several ways to update the JSON file in python. Here, i will give you very simple example of edit JSON file using open(), append(), dump() and close() functions.
PyPI
pypi.org › project › jsoneditor
jsoneditor · PyPI
In python you can simply import jsoneditor and call the editjson function, the first argument is going to be the data. See Formats you can pass the JSON as for all the formats you can pass the JSON in.
Quora
quora.com › How-do-I-edit-a-JSON-file-in-Python
How to edit a JSON file in Python - Quora
Answer: Well, good question Python supports file processing, formatting and editing functionality ⚡ Use function 'open('file_name.extension’)' Or the same as 'open(‘fine_name.extension’,'mode’) You mentioned that you are to edit a JSON file 🗃️, so you have to write commands like ...
GeeksforGeeks
geeksforgeeks.org › python › modify-json-fields-using-python
Modify Json Fields Using Python - GeeksforGeeks
July 23, 2025 - In this example, below code parses a sample JSON data string representing a person's information, changes the 'name' field from "Eva" to "Sophia," and then converts the modified data back to JSON format. The resulting JSON, with the updated name, is printed to the console. Python3
GitHub
github.com › leixingyu › jsonEditor
GitHub - leixingyu/jsonEditor: Json Editor in Python · GitHub
A python script for editing `.json` file based on Qt framework Demo
Starred by 32 users
Forked by 5 users
Languages: Python
AskPython
askpython.com › python-modules › python-read-json-file-modify
Python Read JSON File and Modify - AskPython
June 30, 2023 - You can create, update, load or dump JSON files. It provides APIs similar to standard library modules like marshall and pickles. So it gets easy for users who are familiar with such kind of syntax and interface. JSON is almost the same as a Python dictionary.
Medium
mae-morano-64788.medium.com › editing-deleting-and-adding-elements-to-a-json-file-using-python-5615ea6a0ace
Editing, Deleting and Adding Elements to a JSON file using Python | by Mae Morano | Medium
September 29, 2020 - This function handles the editing of a question just in case. I had used if-elif-else statement for this function. I am thinking of another method to use that will be better but for now this is what we have that works. This function simply does one thing and that is to delete an entire question in the JSON file.
IT trip
en.ittrip.xyz › python
The Ultimate Guide to Editing and Updating JSON Files with Python | IT trip
November 4, 2023 - Table1: Comparison of JSON Data Before and After Editing · For more complex JSON data updates, such as those based on dynamic conditions or involving multiple updates across various levels of the JSON structure, you may need to write more sophisticated code or use additional libraries. For example, `jsonpatch` is a Python library that allows you to make changes to JSON documents using the JSON Patch format. This can be very efficient for complex updates. When working with large JSON files, it's important to consider memory usage and efficiency.
YouTube
youtube.com › python tutorials for digital humanities
Editing an Item in a JSON database in Python (Application of Python for DH | 03) - YouTube
If you enjoy this video, please subscribe. I provide all my content at no cost. If you want to support my channel, please donate viaPayPal: https://www.payp...
Published: June 9, 2020
Views: 7K
Like Geeks
likegeeks.com › home › python › json manipulation and conversion techniques in python
JSON Manipulation and Conversion Techniques in Python
October 15, 2023 - Here we pass two arguments to the function json.dumps(). The first one ‘data’ contains the JSON object that we stored in a Python variable. The second is the sort_keys argument, that when set to True, sorts the data alphabetically and returns the JSON object as a string. The following code uses this functionality: ... import json file = open('jsonData.json', 'r') data = json.load(file) file.close() print(json.dumps(data, sort_keys=True))
GitHub
github.com › dermasmid › py-jsoneditor
GitHub - dermasmid/py-jsoneditor: View and edit your JSON data in the browser, With Python API and CLI. · GitHub
In python you can simply import jsoneditor and call the editjson function, the first argument is going to be the data. See Formats you can pass the JSON as for all the formats you can pass the JSON in.
Starred by 20 users
Forked by 4 users
Languages: Python 84.3% | JavaScript 12.4% | HTML 2.4% | CSS 0.9%
GeeksforGeeks
geeksforgeeks.org › append-to-json-file-using-python
Append to JSON file using Python - GeeksforGeeks
March 26, 2024 - Suppose the JSON file looks like this. We want to add another JSON data after emp_details. Below is the implementation. ... # Python program to update # JSON import json # function to add to JSON def write_json(new_data, filename='data.json'): with open(filename,'r+') as file: # First we load existing data into a dict.
YouTube
youtube.com › watch
Python JSON Tutorial: Clean, Modify, and Save Data to a File [Full Guide] - YouTube
Take a sip of water every time I say "JSON" 😅📁 Work with JSON in Python – Clean, Modify, and Save External DataJSON Sample: https://github.com/NDCSwift/Swi...
Published: May 5, 2025
freeCodeCamp
forum.freecodecamp.org › curriculum help
(absolute beginner) how do I run a Python script & how do I edit JSON? - Curriculum Help - The freeCodeCamp Forum
June 20, 2020 - Hi guys, This is properly easy to do but i have no idea how to do it. So I downloaded something from GitHub that is supposed to help me find codes on a websites. The instructions are following: After running edit: $HOME/.config/crunchyroll-guest-pass-finder/accounts.json The JSON file is an array of dictionaries containing the following fields Fields are: Username - username of the account Password - password of the account Active (optional) - if set and false, then the account is ignor...
GitHub
github.com › bobbyhadz › how-to-update-json-file-in-python › blob › main › main.py
how-to-update-json-file-in-python/main.py at main · bobbyhadz/how-to-update-json-file-in-python
# How to update a JSON file in Python · · import json · · file_path = 'employees.json' · with open(file_path, 'r', encoding='utf-8') as json_file: employees_list = json.load(json_file) · print(employees_list) · employees_list[1]['name'] = 'Bobby Hadz' print(employees_list[1]) ·
Author: bobbyhadz
Reddit
reddit.com › r/learnpython › modify json - what is the best approach?
r/learnpython on Reddit: Modify JSON - what is the best approach?
March 19, 2021 -
I've got a JSON file that needs to be sent as a POST API request but I need to modify the JSON file first, e.g. nest some key-value pairs under a parent name (that needs to be added too), rename some keys, etc.
As far as I understand, this can be relatively easily done if we use dataframes. What is the best way to approach this - convert json to dataframe, make these edits and then convert it back to json? or make these edits in a dictionary?
Top answer 1 of 3
2
Both ways would work. Hard to say without knowing the specifics, although working directly in dictionary would be my first approach.
2 of 3
1
It depends on what changes you want to make. If you want to perform the same operation on a large number of items, it'll be easier to do that with dataframes. If you need to make unique adjustments to individual items then that's probably simpler with dictionaries