Commit 6ff4527

.. _pygad-2162:

PyGAD 2.16.2

Release Date: 2 February 2022

1. A new instance attribute called ``previous_generation_fitness`` added

in the ``pygad.GA`` class. It holds the fitness values of one

generation before the fitness values saved in the

``last_generation_fitness``.

2. Issue in the ``cal_pop_fitness()`` method in getting the correct

indices of the previous parents. This is solved by using the previous

generation's fitness saved in the new attribute

``previous_generation_fitness`` to return the parents' fitness

values. Thanks to Tobias Tischhauser (M.Sc. - `Mitarbeiter Institut

EMS, Departement Technik, OST – Ostschweizer Fachhochschule,

Switzerland <https://www.ost.ch/de/forschung-und-dienstleistungen/technik/systemtechnik/ems/team>`__)

for detecting this bug.

.. _pygad-2163:

PyGAD 2.16.3

Release Date: 2 February 2022

1. Validate the fitness value returned from the fitness function. An

exception is raised if something is wrong.

https://github.com/ahmedfgad/GeneticAlgorithmPython/issues/67