Logging methods
----------------------------------------------------

`datasets` tries to be very transparent and explicit about its inner working, but this can be quite verbose at times.

A series of logging methods let you easily adjust the level of verbosity of the whole library.

Currently the default verbosity of the library is ``WARNING``.

To change the level of verbosity, just use one of the direct setters. For instance, here is how to change the verbosity to the INFO level.

.. code-block:: python

    import datasets
    datasets.logging.set_verbosity_info()

You can also use the environment variable ``DATASETS_VERBOSITY`` to override the default verbosity. You can set it to one of the following: ``debug``, ``info``, ``warning``, ``error``, ``critical``. For example:

.. code-block:: bash
               
    DATASETS_VERBOSITY=error ./myprogram.py

All the methods of this logging module are documented below, the main ones are
:func:`datasets.logging.get_verbosity` to get the current level of verbosity in the logger and
:func:`datasets.logging.set_verbosity` to set the verbosity to the level of your choice. In order (from the least
verbose to the most verbose), those levels (with their corresponding int values in parenthesis) are:

- :obj:`datasets.logging.CRITICAL` or :obj:`datasets.logging.FATAL` (int value, 50): only report the most
  critical errors.
- :obj:`datasets.logging.ERROR` (int value, 40): only report errors.
- :obj:`datasets.logging.WARNING` or :obj:`datasets.logging.WARN` (int value, 30): only reports error and
  warnings. This the default level used by the library.
- :obj:`datasets.logging.INFO` (int value, 20): reports error, warnings and basic information.
- :obj:`datasets.logging.DEBUG` (int value, 10): report all information.


Functions
~~~~~~~~~~~~~~~~~~~~~

.. autofunction:: datasets.logging.get_verbosity

.. autofunction:: datasets.logging.set_verbosity

.. autofunction:: datasets.logging.set_verbosity_info

.. autofunction:: datasets.logging.set_verbosity_warning

.. autofunction:: datasets.logging.set_verbosity_debug

.. autofunction:: datasets.logging.set_verbosity_error

.. autofunction:: datasets.logging.disable_propagation

.. autofunction:: datasets.logging.enable_propagation

.. autofunction:: datasets.logging.get_logger

Levels
~~~~~~~~~~~~~~~~~~~~~

.. autodata:: datasets.logging.CRITICAL

.. autodata:: datasets.logging.DEBUG

.. autodata:: datasets.logging.ERROR

.. autodata:: datasets.logging.FATAL

.. autodata:: datasets.logging.INFO

.. autodata:: datasets.logging.NOTSET

.. autodata:: datasets.logging.WARN

.. autodata:: datasets.logging.WARNING