def __init__(self, config, initial_population=None):
"""
:param config: Either a config.Config object or path to a configuration file.
:param initial_population: Either an initial set of Genome instances to be used
as the initial population, or None, in which case a randomized set of Genomes
will be created automatically based on the configuration parameters.
"""
# If config is not a Config object, assume it is a path to the config file.
if not isinstance(config, Config):
config = Config(config)
# Configure statistics and reporting as requested by the user.
self.reporters = ReporterSet()
if config.collect_statistics:
self.statistics = StatisticsReporter()
self.add_reporter(self.statistics)
else:
self.statistics = None
if config.report:
self.add_reporter(StdOutReporter())
self.config = config
self.reproduction = config.reproduction_type(config, self.reporters)
self.species = SpeciesSet(config)
self.generation = -1
self.total_evaluations = 0
# Create a population if one is not given, then partition into species.
if initial_population is None:
initial_population = self.reproduction.create_new(config.pop_size)
self.species.speciate(initial_population)
