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make evolution optional

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This commit is contained in:
zomseffen 2022-11-14 11:18:57 +01:00
parent 26e7ffb12b
commit bd56173379
4 changed files with 144 additions and 51 deletions
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8
labirinth_ai/LabyrinthWorld.py
View file

@ -30,8 +30,8 @@ class LabyrinthWorld(World):
self.lastUpdate = time.time()
self.nextTrain = self.randomBuffer
self.round = 1
self.evolve_timer = 10
# self.evolve_timer = 1500
# self.evolve_timer = 10
self.evolve_timer = 1500
self.trailMix = np.zeros(self.board_shape)
self.grass = np.zeros(self.board_shape)
@ -163,9 +163,9 @@ class LabyrinthWorld(World):
# adding subjects
from labirinth_ai.Subject import Hunter, Herbivore
from labirinth_ai.Population import Population
self._hunters = Population(Hunter, self, 10)
self._hunters = Population(Hunter, self, 10, do_evolve=False)
self._herbivores = Population(Herbivore, self, 40)
self._herbivores = Population(Herbivore, self, 40, do_evolve=False)
self.subjectDict = self.build_subject_dict()

6
labirinth_ai/Models/EvolutionModel.py
View file

@ -1,7 +1,6 @@
import torch
from torch import nn
import numpy as np
import tqdm
from torch.utils.data import Dataset, DataLoader
from labirinth_ai.Models.BaseModel import device, BaseDataSet, create_loss_function, create_optimizer
from labirinth_ai.Models.Genotype import Genotype
@ -45,6 +44,8 @@ class EvolutionModel(nn.Module):
self.incoming_connections = {}
for connection in self.genes.connections:
if not connection.enabled:
continue
if connection.end not in self.incoming_connections.keys():
self.incoming_connections[connection.end] = []
self.incoming_connections[connection.end].append(connection)
@ -158,7 +159,6 @@ class EvolutionModel(nn.Module):
self.genes.nodes[key].bias = float(lin.bias[0])
class RecurrentDataSet(BaseDataSet):
def __init__(self, states, targets, memory):
super().__init__(states, targets)
@ -172,7 +172,7 @@ class RecurrentDataSet(BaseDataSet):
def train_recurrent(states, memory, targets, model, optimizer):
for action in range(model.action_num):
data_set = RecurrentDataSet(states[action], targets[action], memory[action])
dataloader = DataLoader(data_set, batch_size=64, shuffle=True)
dataloader = DataLoader(data_set, batch_size=512, shuffle=True)
loss_fn = create_loss_function(action)
size = len(dataloader)

105
labirinth_ai/Models/Genotype.py
View file

@ -1,5 +1,6 @@
from abc import abstractmethod
from typing import List, Dict
from copy import copy
import numpy as np
@ -12,11 +13,15 @@ class NodeGene:
self.node_id = node_id
self.node_type = node_type
if node_type == 'hidden':
assert bias is not None, 'Expected a bias for hidden node types!'
if bias is None:
bias = np.random.random(1)[0] * 2 - 1.0
self.bias = bias
else:
self.bias = None
def __copy__(self):
return NodeGene(self.node_id, self.node_type, bias=self.bias)
class ConnectionGene:
def __init__(self, start, end, enabled, innovation_num, weight=None, recurrent=False):
@ -30,12 +35,15 @@ class ConnectionGene:
else:
self.weight = weight
def __copy__(self):
return ConnectionGene(self.start, self.end, self.enabled, self.innvovation_num, self.weight, self.recurrent)
class Genotype:
def __init__(self, action_num: int = None, num_input_nodes: int = None,
nodes: Dict[int, NodeGene] = None, connections: List[ConnectionGene] = None):
self.nodes = {}
self.connections = []
self.nodes: Dict[int, NodeGene] = {}
self.connections: List[ConnectionGene] = []
if action_num is not None and num_input_nodes is not None:
node_id = 0
for _ in range(num_input_nodes):
@ -61,7 +69,8 @@ class Genotype:
while len(nodes_to_rank) > 0:
for list_index, (id, node) in enumerate(nodes_to_rank):
incoming_connections = list(filter(lambda connection: connection.end == id and
not connection.recurrent, self.connections))
not connection.recurrent and connection.enabled,
self.connections))
if len(incoming_connections) == 0:
rank_of_node[id] = 0
nodes_to_rank.pop(list_index)
@ -90,7 +99,7 @@ class Genotype:
raise NotImplementedError()
@abstractmethod
def cross(self, other):
def cross(self, other, fitnes_self, fitness_other):
raise NotImplementedError()
# return self
@ -98,6 +107,11 @@ class Genotype:
class NeatLike(Genotype):
connection_add_thr = 0.3
node_add_thr = 0.3
disable_conn_thr = 0.1
# connection_add_thr = 0.0
# node_add_thr = 0.0
# disable_conn_thr = 0.0
def mutate(self, innovation_num, allow_recurrent=False) -> int:
"""
@ -107,7 +121,7 @@ class NeatLike(Genotype):
:return: Updated innovation number
"""
# add connection
if np.random.random(1)[0] < self.connection_add_thr or True:
if np.random.random(1)[0] < self.connection_add_thr:
nodes = list(self.nodes.keys())
rank_of_node = self.calculate_rank_of_nodes()
end_nodes = list(filter(lambda node: rank_of_node[node] > 0, nodes))
@ -131,9 +145,82 @@ class NeatLike(Genotype):
self.connections.append(
ConnectionGene(nodes[start], end_nodes[end], True, innovation_num,
recurrent=rank_of_node[nodes[start]] > rank_of_node[end_nodes[end]]))
#todo add node
if np.random.random(1)[0] < self.node_add_thr:
active_connections = list(filter(lambda connection: connection.enabled, self.connections))
n = np.random.randint(0, len(active_connections))
old_connection = active_connections[n]
new_node = NodeGene(innovation_num, 'hidden')
node_id = innovation_num
connection_1 = ConnectionGene(old_connection.start, node_id, True, innovation_num,
recurrent=old_connection.recurrent)
innovation_num += 1
connection_2 = ConnectionGene(node_id, old_connection.end, True, innovation_num)
innovation_num += 1
old_connection.enabled = False
self.nodes[node_id] = new_node
self.connections.append(connection_1)
self.connections.append(connection_2)
if np.random.random(1)[0] < self.disable_conn_thr:
active_connections = list(filter(lambda connection: connection.enabled, self.connections))
n = np.random.randint(0, len(active_connections))
old_connection = active_connections[n]
old_connection.enabled = not old_connection.enabled
return innovation_num
def cross(self, other):
return self
def cross(self, other, fitnes_self, fitness_other):
new_genes = NeatLike()
node_nums = set(map(lambda node: node[0], self.nodes.items())).union(
set(map(lambda node: node[0], other.nodes.items())))
connections = {}
for connection in self.connections:
connections[connection.innvovation_num] = connection
other_connections = {}
for connection in other.connections:
other_connections[connection.innvovation_num] = connection
connection_nums = set(map(lambda connection: connection[0], connections.items())).union(
set(map(lambda connection: connection[0], other_connections.items())))
for node_num in node_nums:
if node_num in self.nodes.keys() and node_num in other.nodes.keys():
if int(fitness_other) == int(fitnes_self):
if np.random.randint(0, 2) == 0:
new_genes.nodes[node_num] = copy(self.nodes[node_num])
else:
new_genes.nodes[node_num] = copy(other.nodes[node_num])
elif fitnes_self > fitness_other:
new_genes.nodes[node_num] = copy(self.nodes[node_num])
else:
new_genes.nodes[node_num] = copy(other.nodes[node_num])
elif node_num in self.nodes.keys() and int(fitnes_self) >= int(fitness_other):
new_genes.nodes[node_num] = copy(self.nodes[node_num])
elif node_num in other.nodes.keys() and int(fitnes_self) <= int(fitness_other):
new_genes.nodes[node_num] = copy(other.nodes[node_num])
for connection_num in connection_nums:
if connection_num in connections.keys() and connection_num in other_connections.keys():
if int(fitness_other) == int(fitnes_self):
if np.random.randint(0, 2) == 0:
connection = copy(connections[connection_num])
else:
connection = copy(other_connections[connection_num])
elif fitnes_self > fitness_other:
connection = copy(connections[connection_num])
else:
connection = copy(other_connections[connection_num])
new_genes.connections.append(connection)
elif connection_num in connections.keys() and int(fitnes_self) >= int(fitness_other):
new_genes.connections.append(copy(connections[connection_num]))
elif connection_num in other_connections.keys() and int(fitnes_self) <= int(fitness_other):
new_genes.connections.append(copy(other_connections[connection_num]))
return new_genes

12
labirinth_ai/Population.py
View file

@ -1,6 +1,7 @@
import random
import numpy as np
from labirinth_ai.Models import EvolutionModel
from labirinth_ai.Models.Genotype import NeatLike
@ -14,7 +15,7 @@ def fib(n):
class Population:
def __init__(self, subject_class, world, subject_number):
def __init__(self, subject_class, world, subject_number, do_evolve=True):
self.subjects = []
self.world = world
for _ in range(subject_number):
@ -22,6 +23,7 @@ class Population:
self.subjects.append(subject_class(px, py, genotype_class=NeatLike))
self.subject_number = subject_number
self.subject_class = subject_class
self.do_evolve = do_evolve
def select(self):
ranked = list(self.subjects)
@ -52,6 +54,8 @@ class Population:
return out + cls.scatter(n - np.sum(fibs), buckets)
def evolve(self):
if self.do_evolve:
if len(self.subjects) > 1:
# get updated weights from the models
for subject in self.subjects:
subject.model.update_genes_with_weights()
@ -66,7 +70,8 @@ class Population:
parent_1 = best_subjects[index]
parent_2 = best_subjects[random.randint(index + 1, len(best_subjects) - 1)]
new_genes = parent_1.model.genes.cross(parent_2.model.genes)
new_genes = parent_1.model.genes.cross(parent_2.model.genes,
parent_1.accumulated_rewards, parent_2.accumulated_rewards)
# position doesn't matter, since mutation will set it
new_subject = self.subject_class(0, 0, new_genes)
@ -75,7 +80,8 @@ class Population:
new_subjects.append(new_subject)
assert len(new_subjects) == self.subject_number, 'All generations should have constant size!'
else:
new_subjects = self.subjects
# mutate the pop
mutated_subjects = []
innovation_num = max(map(lambda subject: max(map(lambda connection: connection.innvovation_num,