Python Size and Time Based Logging File Rotating Handler

Python logging's file based handlers have two different kinds of rotation.

• Size based rotation
• Time based rotation

However, these rotations work in isolation. Only one handler can be attached to a log file. One can only add either Size based rotation or Time based rotation.

Using chandler.handler.SizedAndTimedRotatingHandler you can rotate the files based on both time and size. Files will be rotated whenever either of the conditions are met.

How to Use

import the handler

from chandler.handler import SizedAndTimedRotatingHandler

Then you can initialise your loggers and append this handler.

logger = logging.getLogger('test-logger')
log_file_path = '/var/log/test/logging.log'
rotating_handler = SizedAndTimedRotatingHandler(log_file_path, when='h', interval=1, max_bytes=50000, backup_count=3)
logger.addHandler(rotating_handler)

In the above example the handler is configured to rotate every one hour or whenever the file size reaches 50k bytes. This handler is built on top of TimedRotatingFileHandler, so most of the arguments are similar to that of TimedRotatingFileHandler.

installation

You can install with pip

$ pip install chandler-handler

Contribution

Authors

• Suraj Arya