.. _environment_variables:

############################
 PRAW Environment Variables
############################

The second-highest priority configuration options can be passed to a program via
environment variables prefixed with ``praw_``.

For example, you can invoke your script as follows:

.. code-block:: shell

    praw_username=bboe praw_password=not_my_password python my_script.py

The ``username`` and ``password`` provided via environment variables will override any
values contained in a ``praw.ini`` file, but not any variables passed in through
:class:`.Reddit`.

All :ref:`configuration_options` can be provided in this manner, except for custom
options.
