Python JSON Logger

4.0.0 · active · verified Sat Mar 28

A JSON log formatter for the Python logging package that supports various JSON encoders. Current version is 4.0.0, with regular releases typically made every few months.

Warnings

breaking The use of some older imports has changed, e.g., 'from pythonjsonlogger.jsonlogger import jsonlogger' is incorrect.
Fix: Migrate to 'from pythonjsonlogger.jsonlogger import JsonFormatter'.
gotcha Ensure that required fields are correctly specified in comma-separated format to avoid formatting issues.
Fix: Use the new formatter syntax that supports comma-separated lists.

Install

pip install python-json-logger Install python-json-logger

Imports

JsonFormatter
```
from pythonjsonlogger.jsonlogger import JsonFormatter
```
Make sure to use the full path for compatibility.

Quickstart

Basic usage of JsonFormatter to log messages in JSON format.

import logging
from pythonjsonlogger.jsonlogger import JsonFormatter

logger = logging.getLogger('my_logger')
handler = logging.StreamHandler()
formatter = JsonFormatter()
handler.setFormatter(formatter)
logger.addHandler(handler)
logger.setLevel(logging.INFO)
logger.info('This is a log message with JSON formatting')

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