Bank customer
=============

Write the function :py:func:`customer` that takes the balance of a
bank customer, and returns a string showing the customer type using
the following rules. If the bank account balance is greater or equal
than 1000 Euros the function returns the string ``'reliable'``. If it is
less than 1000 Euros but positive, returns the string ``'precarious'``. If the
balance is 0 or negative but greater than -1000 Euros, the customer
type is ``'short on'`` and if it is less than or equal to -1000 Euros,
the customer type is ``'defaulting'``. Solve this exercise in two
different ways: with and without nested if statements.

Save this function into a file named ``customer.py``.

See the following examples:
   
   .. literalinclude:: test-customer.txt
      :language: python3
      :lines: 2-

   .. note::
      More tests are provided in the :download:`test-customer.txt<test-customer.txt>` file.


.. rubric:: Solution

A solution is provided in the
:download:`customer.py<solutions/customer.py>` file.