Mu: executing a program
========================

For this example, I modified my previous program named test.py
so that it raises a different exception.
First, I show what happens when I run test.py with Mu,
without friendly's help

.. image:: images/test_problem.png
   :scale: 50 %
   :alt: Mu running test_problem

Using friendly with Mu
--------------------------------

To use friendly with Mu when running a program in this way,
I need to use a second,
very short program, and run that program instead::

    from friendly.mu import run
    run("test.py")

.. image:: images/test_problem_friendly.png
   :scale: 50 %
   :alt: Mu with friendly running test_problem

As should be expected, a traceback is shown, with a hint added.
By typing ``why()`` at the prompt, friendly gives me
more information.


You likely will not be surprised to know that
I can ask friendly to provide explanations in French instead:

.. image:: images/test_problem_fr.png
   :scale: 50 %
   :alt: Mu with friendly running test_problem


.. danger::

    Do not name your own program ``friendly.py``.