How Can I Correctly Write JSON Data from a Dictionary to a File in Python?

How to Write JSON Data to a File

When attempting to write JSON data stored in a dictionary to a file using the code:

f = open('data.json', 'wb')
f.write(data)

you might encounter the error:

TypeError: must be string or buffer, not dict

This is because the data in the dictionary needs to be encoded as JSON before writing.

Using Python Built-in JSON Module:

Python's built-in json module provides a convenient way to encode and decode JSON data. To write JSON data from a dictionary, you can use the following code:

For maximum compatibility (Python 2 and 3):

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

For modern systems (Python 3 and UTF-8 support):

import json
with open('data.json', 'w', encoding='utf-8') as f:
    json.dump(data, f, ensure_ascii=False, indent=4)

• ensure_ascii=False: This ensures that non-ASCII characters are not converted to escape sequences, preserving the original characters.
• indent=4: This indents the JSON output for readability.

Note: For more information on the json module, refer to the Python documentation.

The above is the detailed content of How Can I Correctly Write JSON Data from a Dictionary to a File in Python?. For more information, please follow other related articles on the PHP Chinese website!