.. py:module:: trucks

Trucks
======

A transport company wants to distribute the cargo of certain products
in their trucks. It has a nested list where each
sublist corresponds to a product and consists of two elements: the
product code (:class:`str`) and its quantity in kg (:class:`int`).

Write the **modifier** function :py:func:`assign_truck` that from a
list like the one mentioned, the code of a truck (:class:`str`) and
the amount that it can carry, in Kg (:class:`int`), **modifies** the list of
products so that the sublists with the products assigned to the truck
have a third item corresponding to the code of the truck.

The allocation of the products to the truck is done according to the
following criteria:

  - the order of product allocation is the same order in which products
    appear in the list,

  - a product must be assigned completely: the corresponding amount can
    not be split, and

  - we must allocate as many products as they fit in the truck.

Save this function into file :file:`trucks.py`. Example:

.. literalinclude:: test-assign_truck.txt
   :language: python3
   :lines: 3-6

In this case, product ``'LJ8'`` cannot be assigned to the truck
because the associated amount, ``78``, would cause the truck's
capacity to be exceeded, ``250``. Conversely, product ``'TF'`` can be
assigned because the associated quantity ``14``, added to the quantity
of previously assigned products, does not exceed the capacity of the
truck.

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


.. rubric:: Solution

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