Perfumes
========

.. py:module:: perfumes
 
The company SMELLS S.A. produces several perfumes and saves the data
in a list of sublists where each sublist corresponds to a perfume and
has the following data: perfume name (string), perfume type (a string
that can be ``'PARFUM', 'EAU_PARFUM', 'EAU_TOILETTE'`` or
``'EAU_COLOGNE'``), net content in ml (int) and price in euros
(float).

Save the following functions into the same file named ``perfumes.py``.

.. py:function:: perfumes1(lperfumes)

   Given a perfumes list as described, this function returns a
   dictionary where the key is a net content and the value is a list
   with those perfume names that have this net content. Perfume names
   in these lists are in the same order as in the given list.

   .. literalinclude:: test-perfumes1.txt
       :language: python
       :lines: 3-

.. Note::

   More tests are provided in file :download:`test-perfumes1.txt`.

.. py:function:: perfumes2(lperfumes)

   Given a perfumes list as described, this function returns a
   dictionary where the key is a perfume type and the value is a list
   of sublists of perfumes of this type. Each sublist has two
   elements: the perfume name and its price. Perfume names
   in these lists are in the same order as in the given list.
   
   .. literalinclude:: test-perfumes2.txt
       :language: python
       :lines: 3-

.. Note::

   More tests are provided in file :download:`test-perfumes2.txt`.

.. py:function:: buy1(perfumes, euros)
                 
   Given a dictionary as the one returned by function
   ``creaperfumes2``, a perfume type and an amount of euros, this
   function returns ``True`` if there is a perfume in the given
   dictionary of the given type that can be bought with the given
   amount and ``False`` otherwise.

   .. literalinclude:: test-buy1.txt
       :language: python
       :lines: 3-
  
.. Note::

   More tests are provided in file
   :download:`test-buy1.txt`.


.. py:function:: buy2

   Given a dictionary as the one returned by function
   ``creaperfumes2`` and an amount of euros, this function returns a
   list with those perfume names that have a price less than or equal to
   the given amount. This list must be ordered lexicographically.

   .. literalinclude:: test-buy2.txt
       :language: python
       :lines: 3-          

.. Note::

   More tests are provided in file
   :download:`test-buy2.txt`.

   
.. rubric:: Solution
      
A solution of these functions is provided in file :download:`perfumes.py
<solutions/perfumes.py>`.