Python JSON Tutorial for Beginners | Read and Write JSON File in Python (Step-by-Step Project)

Published: 20 February 2026
on channel: MLTut

151

In this video, you will learn how to read and write JSON file in Python using a complete sales data example.

We start with a real sales.json file and go step by step:
-How to open a JSON file in Python
-How json.load() works
-How JSON text becomes Python list and dictionary objects
-How to loop through JSON data
-How to handle missing values (null → None)
-How to perform calculations from JSON records
-How to create and write a new JSON file using json.dump()
-How to update and append data to an existing JSON file safely

If you are learning file handling in Python, this tutorial will help you understand how JSON parsing works in real projects. Many beginners can open a file, but they struggle to convert JSON into structured Python objects.

In this Python JSON tutorial for beginners, I explain the complete workflow clearly with a practical example.

You will understand:
-JSON vs normal text files
-JSON load and dump in Python
-Python JSON file example explained
-How to validate JSON data before calculations
-How to update JSON file in Python without breaking structure

This is not just theory. You will see how to process structured data step by step and generate a clean output file like a real-world sales report.

If you are searching for:
-how to read JSON in Python
-how to write JSON file in Python
-working with JSON file in Python
-JSON file handling in Python
-append data to JSON Python

This video covers all of that in one complete walkthrough.

In the next video, we will move to Python error handling so you can make your programs more robust.

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