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feature: store and load statistics #3

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34 changes: 26 additions & 8 deletions neat/checkpoint.py
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@

from neat.population import Population
from neat.reporting import BaseReporter
import neat.reporting


class Checkpointer(BaseReporter):
Expand Down Expand Up @@ -38,7 +39,7 @@ def __init__(self, generation_interval=100, time_interval_seconds=300,
def start_generation(self, generation):
self.current_generation = generation

def end_generation(self, config, population, species_set):
def end_generation(self, config, population, species_set, reporters):
checkpoint_due = False

if self.time_interval_seconds is not None:
Expand All @@ -52,23 +53,40 @@ def end_generation(self, config, population, species_set):
checkpoint_due = True

if checkpoint_due:
self.save_checkpoint(config, population, species_set, self.current_generation)
self.save_checkpoint(config, population, species_set, self.current_generation, reporters)
self.last_generation_checkpoint = self.current_generation
self.last_time_checkpoint = time.time()

def save_checkpoint(self, config, population, species_set, generation):
def save_checkpoint(self, config, population, species_set, generation,reporters):
""" Save the current simulation state. """
filename = '{0}{1}'.format(self.filename_prefix, generation)
print("Saving checkpoint to {0}".format(filename))

with gzip.open(filename, 'w', compresslevel=5) as f:
data = (generation, config, population, species_set, random.getstate())
data = (generation, config, population, species_set, random.getstate(),reporters)
pickle.dump(data, f, protocol=pickle.HIGHEST_PROTOCOL)

@staticmethod
def restore_checkpoint(filename):
"""Resumes the simulation from a previous saved point."""
with gzip.open(filename) as f:
generation, config, population, species_set, rndstate = pickle.load(f)
random.setstate(rndstate)
return Population(config, (population, species_set, generation))
try:
with gzip.open(filename) as f:
generation, config, population, species_set, rndstate, reporters = pickle.load(f)
except ValueError as e:
with gzip.open(filename) as f:
print("There was an issue loading the checkpoint. Trying old mode")
generation, config, population, species_set, rndstate = pickle.load(f)


random.setstate(rndstate)
p = Population(config, (population, species_set, generation))
if 'reporters' in locals():
print("Reporters were extracted from the save file and will be added to the population")
for reporter in reporters:
p.add_reporter(reporter)
else:
print("No reporters found. Adding an StdOut and Statistics reporter")
p.add_reporter(neat.StdOutReporter(True))
p.add_reporter(neat.StatisticsReporter())
return p

2 changes: 1 addition & 1 deletion neat/reporting.py
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,7 @@ def start_generation(self, gen):

def end_generation(self, config, population, species_set):
for r in self.reporters:
r.end_generation(config, population, species_set)
r.end_generation(config, population, species_set, self.reporters)

def post_evaluate(self, config, population, species, best_genome):
for r in self.reporters:
Expand Down