How do I write JSON data to a file in Python?

Better Stack Team
Updated on February 3, 2023

You can use the json module in Python to write JSON data to a file. The module has a dump() function that can be used to write JSON data to a file-like object. Here's an example of how you can use it:

import json

data = {
    "name": "John Smith",
    "age": 35,
    "city": "New York"

with open("data.json", "w") as file:
    json.dump(data, file)

In this example, data is a Python dictionary that contains the JSON data. The dump() function takes two arguments: the JSON data and the file-like object to which the data should be written. The with open statement opens the file "data.json" in "w" mode, which means it will be opened for writing. The file will be created if it does not exist, and truncated if it does exist. The json.dump() writes the JSON data to the file and file.close() is called automatically when the block inside the with statement is exited.

Got an article suggestion? Let us know
Explore more
Licensed under CC-BY-NC-SA

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Make your mark

Join the writer's program

Are you a developer and love writing and sharing your knowledge with the world? Join our guest writing program and get paid for writing amazing technical guides. We'll get them to the right readers that will appreciate them.

Write for us
Writer of the month
Marin Bezhanov
Marin is a software engineer and architect with a broad range of experience working...
Build on top of Better Stack

Write a script, app or project on top of Better Stack and share it with the world. Make a public repository and share it with us at our email.

or submit a pull request and help us build better products for everyone.

See the full list of amazing projects on github