Overview

This library is provided to allow standard python logging to output log data as json objects. With JSON we can make our logs more readable by machines and we can stop writing custom parsers for syslog type records.

Installing

Manual:

python setup.py install

Usage

Json outputs are provided by the JsonFormatter logging formatter. You can add the customer formatter like below:

    import logging
    import jsonlogger

    logger = logging.getLogger()

    logHandler = logging.StreamHandler()
    formatter = jsonlogger.JsonFormatter()
    logHandler.setFormatter(formatter)
    logger.addHandler(logHandler)

The fmt parser can also be overiden if you want to use an alternate from the default.

    class CustomJsonFormatter(jsonlogger.JsonFormatter):
      def parse(self):
          return eval(self._fmt)

Example

Sample JSON with a full formatter (basically the log message from the unit test). Every log message will appear on 1 line like a typical logger.

{
    "threadName": "MainThread", 
    "name": "root", 
    "thread": 140735202359648, 
    "created": 1336281068.506248, 
    "process": 41937, 
    "processName": "MainProcess", 
    "relativeCreated": 9.100914001464844, 
    "module": "tests", 
    "funcName": "testFormatKeys", 
    "levelno": 20, 
    "msecs": 506.24799728393555, 
    "pathname": "tests/tests.py", 
    "lineno": 60, 
    "asctime": ["12-05-05 22:11:08,506248"], 
    "message": "testing logging format", 
    "filename": "tests.py", 
    "levelname": "INFO"
}