Robust and effective logging for Python 2 and 3.
Latest commit b5d49fc Mar 8, 2018

README.rst

logzero

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Robust and effective logging for Python 2 and 3.

Logo

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.
  • Windows color output supported by colorama
  • 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.
  • Licensed under the MIT license.
  • Heavily inspired by the Tornado web framework.

Demo output in color

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)

Adding a rotating logfile is that easy:

import logzero
from logzero import logger

# Setup rotating logfile with 3 rotations, each with a maximum filesize of 1MB:
logzero.logfile("/tmp/rotating-logfile.log", maxBytes=1e6, backupCount=3)

# Log messages
logger.info("This log message goes to the console and the logfile")

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:

Installation

Install logzero with pip:

$ pip install -U logzero

If you don't have pip installed, this Python installation guide can guide you through the process.

Alternatively, if you use the Anaconda distribution:

$ conda config --add channels conda-forge
$ conda install logzero

You can also install logzero from the public Github repo:

$ git clone https://github.com/metachris/logzero.git
$ cd logzero
$ python setup.py install

On openSUSE you can install the current version from repos: python2-logzero, python3-logzero. In the newest openSUSE release you can install it with zypper: sudo zypper in python2-logzero.

Changelog

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

Feedback

All kinds of feedback and contributions are welcome.