Changelog

History

Version 0.2.29 (2022-11-22)

  • Added is_deterministic to GeneticProgram. This is used only if the GP is deterministic.

  • If the GP is deterministic, the function call is sped up through memoisation (i.e. cached results).

Version 0.2.28 (2022-11-01)

  • Fixed bug in Node repr if operator is None.

  • Added new population_growth_function to Island, easier to switch between stead-state and generational.

  • Added new population growth functions to utils.

  • IslandError added to utils.

  • Moved x from to utils.

Version 0.2.27 (2022-09-02)

  • A population_evaluation_function can now be added to define custom fitness function calls to individuals.

  • This makes the way open for multi server fitness evaluation.

  • Added natural_selection.utils.

  • Moved clone_classic to natural_selection.utils.

  • Moved get_random_string to natural_selection.utils.

  • Moved default_save_checkpoint_function to natural_selection.utils.

  • Moved post_evolution_function_save_all to natural_selection.utils.

  • Added evaluate_individual_multiproc_wrapper to natural_selection.utils.

  • Added evaluate_individuals_sequentially to natural_selection.utils.

Version 0.2.26 (2022-06-29)

  • Major work on expanding package to include Genetic Programming.

  • Added tree generation function random_generate to genetic_programs.

  • Renamed natural_selection.genetic_programs.functions to natural_selection.genetic_programs.node_operators.

  • Added is_empty to Node class.

  • Added breadth and max_breadth to Node class, useful for doing crossover.

  • Added more history “stamps” to Island for alien spawn, migrant import.

  • General work on GeneticProgram class.

  • Added create_genetic_program to Island for easy wrapper.

  • Added get_subtree to Node class to find a subtree at the given point.

  • Added set_subtree to Node class to set a subtree at the given point.

  • Node operators now have a strict_precedence parameter to solve issues where argument precedence is important.

  • Fixed issue with genetic code checks by adding force_update to both GeneticProgram and Individual.

Version 0.2.25 (2022-06-20)

  • Implemented new multiprocessing ability. Can now specify with the core_count param to split up evaluation over multiple cores.

  • Major refactoring. Island is now imported from the main package, to make it future proof for running genetic programs.

Version 0.2.24 (2022-04-07)

  • Added param with_replacement to selection functions.

Version 0.2.23 (2022-04-05)

  • Added a new ability to spawn new aliens at the end of each generation.

  • Added alien_spawn_function to Island initialisation.

Version 0.2.22 (2022-04-03)

  • Renamed the elite_selection to parent_selection due to misleading name.

  • Renamed the original parent_selection to parent_combination due to misleading name.

  • Removed the elite in parent selection functions.

  • Added selection_roulette to parent selection.

  • Added new crossover_one_binary_union crossover operator for binary string union.

Version 0.2.21 (2022-03-13)

  • Added the ability to add properties to islands, much like with individuals, chromosomes and genes. add_new_property, get_properties, and get.

Version 0.2.20 (2022-03-11)

  • Added the param maximise_function to Island, to either maximise the function (default) or when set to false to minimise the function.

Version 0.2.19 (2021-12-29)

  • Fixed minor issue when loading an island and logging not working.

Version 0.2.18 (2021-11-19)

  • Print crossover logs after resetting offspring

  • Adding all properties of individuals to lineage nodes.

  • Added get to Individuals to safely return properties.

  • Custom crossover functions can now add gene_inheritance to offspring to detail what percentages offspring inherit.

Version 0.2.17 (2021-11-16)

  • Added write_lineage_json to Island to easily dump lineage graph to JSON file.

Version 0.2.16 (2021-11-16)

  • Added lineage to Island, to easily track the lineage of parents/offsrping. This is especially handy for enforcing genetic diversity.

  • Added write_report to Island, for printing generational history to file.

  • Logging now writes individuals as strings, not the full representation, thus logs are less cluttered.

Version 0.2.15 (2021-10-08)

  • Added ability to give the chromosome creation function through to initialisation chromosome_create_func, overcoming deep copy issues.

Version 0.2.14 (2021-10-02)

  • Bug fix in create_individual of island after adding new init params to Individual class.

Version 0.2.13 (2021-10-02)

  • Moved the save checkpoint function from the Island class into utils as save_checkpoint_function.

  • Added pre_generation_check_function to Island evolve for performing custom pre generation actions.

  • Added post_generation_check_function to Island evolve for performing custom post generation actions.

  • Added post_evolution_function to Island evolve for performing custom post evolution actions.

Version 0.2.12 (2021-09-29)

  • Added deep copying on randomly creating new gene (to avoid referencing).

Version 0.2.11 (2021-09-24)

  • Fixed flaw where chromosome and individual properties aren’t being copied with initialisation.

  • Renamed _verbose_logging to verbose_logging to publicly expose.

Version 0.2.10 (2021-09-08)

  • Fixed bug in name param of Island.

  • Removed the need to pass a dict of params to evaluate function of individuals

Version 0.2.9 (2021-09-01)

  • Fixed major bug in initialise_population_mutation_function, due to chromosomes not being copied

Version 0.2.8 (2021-09-01)

  • Added new randomise function: mutation_randomize_n_point

  • Added new initialisation function initialise_population_mutation_function to use the defined mutation function

Version 0.2.7 (2021-08-31)

  • Fixed major bug in not adding new offspring due to genetic code not being reset

Version 0.2.6 (2021-08-31)

  • Renamed force_genetic_diversity to allow_twins

  • Added new tournament selection function of unique only selection, see selection_elites_tournament_unique

  • Fixed bug in crossover_two_n_point where crossover was just swapping genes, and effectively not creating true offspring

  • Logging offspring stats too

  • Now individuals and chromosomes can have custom properties easily added

Version 0.2.5 (2021-08-18)

  • Fitness function now takes the individual instead of chromosome

  • Fitness not reset for offspring

  • Documentation extended