Patients Temperatures
=====================

Let's consider files that record the body temperatures for a number of respiratory diseases patients (which b.t.w. has been this year's *Marató de TV* theme).
The info in the files has the following format:
each line of the file corresponds to a patient and contains the following data fields separated by coma (``','``):

    - The average of the patient's temperatures rounded to 1 decimals (:class:`float`).
    - The patient's name of the patient (:class:`str`).
    - A variable number of temperature measures (:class:`float` rounde to 1 decimal).

The file :download:`patients.csv <patients.csv>` is an example:

    .. literalinclude:: patients.csv
        :language: python

We need to filter the temperatures below a given threshold.
Specificly, we need a new file with the same info, order and format of the given patients file but:

    #. The temperatures below the threshold must be deleted.
    #. The average temperatures must be recalculated accordingly.
    #. The patiens with all temperatures below the threshold must be deleted.

To this purpose please implement the following Python function in the module :mod:`pat_temp` (file :file:`pat_temp.py`):

The first function is:

    .. py:function:: filter_pat_temp(fn, fnout, tempth)

such that
    
    **given**

        - ``fn``, ``fnout``, :class:`str` with textfile names with patients data in the format described above.
        - ``tempth``, :class:`float`.
        
    does two things:
        
        #. **writes** a file named ``fnout`` resulting from filtering the temperatures by the threshold ``tempth`` in the way described above.
        
        #. **returns** an :class:`int` with the number of patients in the output file.

For example the call ``filter_pat_temp('patients.csv', 'patients-380.csv', 38.0)``  should return 8 and write a file called ``'patients-380.csv'`` with the following info:

    .. literalinclude:: patients-380.ref
        :language: python

Doctests are available at the  :download:`filter_pat_temp.test <filter_pat_temp.test>` file
and the files used in those tests area available at
:download:`patients-380.ref <patients-380.ref>`,
:download:`patients-390.ref <patients-390.ref>`,
:download:`patients-393.ref <patients-393.ref>`,
:download:`patients-395.ref <patients-395.ref>`.


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.. note::

    To implement this function is recommended (but not mandatory) to previosly implement, test and call the following auxiliar functions:

The first function would be:

    ``filter_tempL(tempL, tempth)``

    **given**

        - ``tempL`` a :class:`list` of  :class:`str` representing patient temperatures.
        - ``tempth`` a :class:`float` representing a temperature threshold.

    **returns** a :class:`list` of the temperatures in ``tempL`` converted to :class:`float` such that a greater or equal than ``tempth``.

The second function would be:

    ``convert_tempL(tempL)``

    **given**

        - ``tempL`` a :class:`list` of :class:`float` representing patient temperatures.

    **returns**

        - a :class:`list` of :class:`str` with the temperatures of  ``tempL`` in the same order converted to :class:`str`.