Dump JSON List to file Python

Python Write JSON to File

You can convert any Python object to a JSON string and write JSON to File using json.dumps[] function and file.write[] function respectively.

Following is a step by step process to write JSON to file.

1. Prepare JSON string by converting a Python Object to JSON string using json.dumps[] function.
2. Create a JSON file using open[filename, w] function. We are opening file in write mode.
3. Use file.write[text] to write JSON content prepared in step 1 to the file created in step 2.
4. Close the JSON file.

Example 1: Write JSON [Object] to File

In this example, we will convert or dump a Python Dictionary to JSON String, and write this JSON string to a file named data.json.

Python Program

import json aDict = {"a":54, "b":87} jsonString = json.dumps[aDict] jsonFile = open["data.json", "w"] jsonFile.write[jsonString] jsonFile.close[]

Output

Run the above program, and data.json will be created in the working directory.

data.json

{"a": 54, "b": 87}

Example 2: Write JSON [List of Object] to File

In this example, we will convert or dump Python List of Dictionaries to JSON string, and write this JSON string to file named data.json.

Python Program

import json aList = [{"a":54, "b":87}, {"c":81, "d":63}, {"e":17, "f":39}] jsonString = json.dumps[aList] jsonFile = open["data.json", "w"] jsonFile.write[jsonString] jsonFile.close[]

Output

Run the above program, and data.json will be created in the working directory.

data.json

[{"a": 54, "b": 87}, {"c": 81, "d": 63}, {"e": 17, "f": 39}]

Summary

In this tutorial of Python Examples, we learned how to write JSON to File, using step by step process and detailed example programs.