discord.py/docs/logging.rst

.. versionadded:: 0.6.0
.. _logging_setup:

Setting Up Logging
===================

*discord.py* logs errors and debug information via the :mod:`logging` python
module. It is strongly recommended that the logging module is
configured, as no errors or warnings will be output if it is not set up.
Configuration of the ``logging`` module can be as simple as::

    import logging

    logging.basicConfig(level=logging.INFO)

Placed at the start of the application. This will output the logs from
discord as well as other libraries that use the ``logging`` module
directly to the console.

The optional ``level`` argument specifies what level of events to log
out and can be any of ``CRITICAL``, ``ERROR``, ``WARNING``, ``INFO``, and
``DEBUG`` and if not specified defaults to ``WARNING``.

More advanced setups are possible with the :mod:`logging` module. For
example to write the logs to a file called ``discord.log`` instead of
outputting them to the console the following snippet can be used::

    import discord
    import logging

    logger = logging.getLogger('discord')
    logger.setLevel(logging.DEBUG)
    handler = logging.FileHandler(filename='discord.log', encoding='utf-8', mode='w')
    handler.setFormatter(logging.Formatter('%(asctime)s:%(levelname)s:%(name)s: %(message)s'))
    logger.addHandler(handler)

This is recommended, especially at verbose levels such as ``INFO``
and ``DEBUG``, as there are a lot of events logged and it would clog the
stdout of your program.



For more information, check the documentation and tutorial of the
:mod:`logging` module.