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Check the ``RPi.GPIO``
=================================

If you are a Python user, you can program GPIOs with API provided by
``RPi.GPIO``.

``RPi.GPIO`` is a module to control Raspberry Pi GPIO channels. This package
provides a class to control the GPIO on a Raspberry Pi. For examples and
documents, visit: http://sourceforge.net/p/raspberry-gpio-python/wiki/Home/.

Test whether RPi.GPIO is installed or not, type in python:

.. raw:: html

   <run></run>

.. code-block::

    python

.. image:: ../img/image27.png


In Python CLI, input ``import RPi.GPIO``, If no error prompts, it means
RPi.GPIO is installed.

.. raw:: html

   <run></run>

.. code-block::

    import RPi.GPIO

.. image:: ../img/image28.png


If you want to quit python CLI, type in:

.. raw:: html

   <run></run>

.. code-block::

    exit()

.. image:: ../img/image29.png