json-pyformatter

Python logging outputs as JSON.
This JsonFormatter is written in Pure Python.

Installation

pip install json-pyformatter

Usage

import logging
from json_pyformmatter import JsonFormatter

logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)
handler = logging.StreamHandler()
fields = ('levelname', 'filename', 'message')
handler.setFormatter(JsonFormatter(fields=fields))
logger.addHandler(hander)

logger.info('hello')

default fields is ('asctime', 'levelname', 'message')
Other supported fields are:

In details, please refere to logrecord-attributes

Output

{"levelname": "INFO", "filename": "test_formatter.py", "message": "hello"}

If specify indent option as 2, the result is as follows:

{
  "levelname": "INFO",
  "filename": "test_formatter.py",
  "message": "hello"
}

When exc_info is True, the result includes traceback infomation as follows:

{
  'asctime': '2019-12-01 13:58:34',
  'levelname': 'ERROR',
  'message': 'error occurred !!',
  'traceback': [
    'Traceback (most rec...ll last):',
    'File "/example/test..._exc_info',
    'raise TypeError(message)',
    'TypeError: error occurred !!'
  ]
}

Logging message type is dict:

{
  'asctime': '2019-12-01 23:34:32',
  'levelname': 'INFO',
  'message': {
    'id': '001',
    'msg': 'This is test.',
    'name': 'test'
  }
}