How to Write Python Dictionaries as JSON to a File?

Writing JSON Data to a File

When attempting to write JSON data stored in a dictionary to a file, an error may occur, stating that the data must be a string or buffer. This arises because dictionaries are not directly compatible with JSON format.

Solution:

To write JSON data to a file, it must first be encoded as JSON. This can be achieved using the json module in Python:

import json
with open('data.json', 'w') as f:
    json.dump(data, f)

This code opens a file named 'data.json' in write mode and uses the json.dump() function to write the JSON-encoded data to the file.

For broader compatibility across Python 2 and 3 and non-ASCII characters:

import json
with open('data.json', 'w') as f:
    json.dump(data, f, ensure_ascii=False, indent=4)

The ensure_ascii=False parameter prevents ASCII-only output, while the indent=4 parameter adds indentation for readability.

Refer to the JSON documentation for further details and customization options.

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