logzero 1.2.1

Features

• Easy logging to console and/or (rotating) file.

• Provides a fully configured standard Python logger object.

• Pretty formatting, including level-specific colors in the console.

• Robust against str/bytes encoding problems, works with all kinds of character encodings and special characters.

• Multiple loggers can write to the same logfile (also across multiple Python files).

• Global default logger with logzero.logger and custom loggers with logzero.setup_logger(..).

• Compatible with Python 2 and 3.

• All contained in a single file.

• No further Python dependencies.

• Licensed under the MIT license.

• Heavily inspired by the Tornado web framework.

Example Usage

from logzero import logger

logger.debug("hello")
logger.info("info")
logger.warn("warn")
logger.error("error")

# This is how you'd log an exception
try:
    raise Exception("this is a demo exception")
except Exception as e:
    logger.exception(e)

Here are more examples which show how to use logfiles, custom formatters and setting a minimum loglevel:

import logging
import logzero
from logzero import logger

# This log message goes to the console
logger.debug("hello")

# Set a minimum log level
logzero.loglevel(logging.INFO)

# Set a logfile (all future log messages are also saved there)
logzero.logfile("/tmp/logfile.log")

# You can also set a different loglevel for the file handler
logzero.logfile("/tmp/logfile.log", loglevel=logging.ERROR)

# Set a rotating logfile (replaces the previous logfile handler)
logzero.logfile("/tmp/rotating-logfile.log", maxBytes=1000000, backupCount=3)

# Disable logging to a file
logzero.logfile(None)

# Set a custom formatter
formatter = logging.Formatter('%(name)s - %(asctime)-15s - %(levelname)s: %(message)s');
logzero.formatter(formatter)

# Log some variables
logger.info("var1: %s, var2: %s", var1, var2)

Take a look at the documentation for more information and examples:

• Documentation: https://logzero.readthedocs.io.

$ pip install -U logzero

Changelog

See the changelog here: https://github.com/metachris/logzero/blob/master/HISTORY.rst

Future Features & Ideas

• Decorator for logging function calls

• Easier usage of custom log handlers (currently works like this)

• JSON output (a la 12 factor app)

• Send logs to remote log collector (maybe)

• Structured logging a la https://structlog.readthedocs.io/en/stable/index.html (maybe)

TODO

• Tests

  • Custom handlers and reconfiguration

  • Strange behaviour: py.test with default logger - capturing err does not work if the logger is setup initially in logzero. Only works when setup from the py script.

Related Projects

• https://12factor.net/logs

• Log collectors: fluentd, logstash, etc.

• https://structlog.readthedocs.io/en/stable/why.html

Notes: How to release a new version

via https://cookiecutter-pypackage.readthedocs.io/en/latest/pypi_release_checklist.html

# Run the tests
py.test
make lint

# Update history
vi HISTORY.rst
git add HISTORY.rst
git commit -m "Changelog for upcoming release 0.1.1."

# Update version
bumpversion minor

# Push
git push && git push --tags

Credits

This package was created with Cookiecutter and the audreyr/cookiecutter-pypackage project template.

1.2.1 (2017-07-09)

• Logfiles with custom loglevels (eg. stream handler with DEBUG and file handler with ERROR).

1.2.0 (2017-07-05)

• Way better API for configuring the default logger with logzero.loglevel(..), logzero.logfile(..), etc.

• Built-in rotating logfile support.

import logging
import logzero
from logzero import logger

# This log message goes to the console
logger.debug("hello")

# Set a minimum log level
logzero.loglevel(logging.INFO)

# Set a logfile (all future log messages are also saved there)
logzero.logfile("/tmp/logfile.log")

# Set a rotating logfile (replaces the previous logfile handler)
logzero.logfile("/tmp/rotating-logfile.log", maxBytes=1000000, backupCount=3)

# Disable logging to a file
logzero.logfile(None)

# Set a custom formatter
formatter = logging.Formatter('%(name)s - %(asctime)-15s - %(levelname)s: %(message)s');
logzero.formatter(formatter)

# Log some variables
logger.info("var1: %s, var2: %s", var1, var2)

1.1.2 (2017-07-04)

• Better reconfiguration of handlers, doesn’t remove custom handlers anymore

1.1.0 (2017-07-03)

• Bugfix: Disabled color logging to logfile

1.1.0 (2017-07-02)

• Global default logger instance (logzero.logger)

• Ability to reconfigure the default logger with (logzero.setup_default_logger(..))

• More tests

• More documentation

1.0.0 (2017-06-27)

• Cleanup and documentation

0.2.0 (2017-06-12)

• Working logzero package with code and tests

0.1.0 (2017-06-12)

• First release on PyPI.