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attack_config_parser.py
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attack_config_parser.py
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from copy import copy
from typing import List
import numpy as np
import torch
import torch.optim as optim
import torchvision.transforms as T
import yaml
from attacks.initial_selection import find_initial_w
from matplotlib.pyplot import fill
from models.classifier import Classifier
import wandb
from utils.wandb import load_model
class AttackConfigParser:
def __init__(self, config_file):
with open(config_file, 'r') as file:
config = yaml.safe_load(file)
self._config = config
def create_target_model(self):
if 'wandb_target_run' in self._config:
model = load_model(self._config['wandb_target_run'])
elif 'target_model' in self._config:
config = self._config['target_model']
model = Classifier(num_classes=config['num_classes'],
architecture=config['architecture'])
model.load_state_dict(torch.load(config['weights']))
model.wandb_name = None
else:
raise RuntimeError('No target model stated in the config file.')
model.eval()
self.model = model
return model
def get_target_dataset(self):
try:
api = wandb.Api(timeout=60)
run = api.run(self._config['wandb_target_run'])
return run.config['Dataset'].strip().lower()
except:
return self._config['dataset']
def create_evaluation_model(self):
if 'wandb_evaluation_run' in self._config:
evaluation_model = load_model(self._config['wandb_evaluation_run'])
elif 'evaluation_model' in self._config:
config = self._config['evaluation_model']
evaluation_model = Classifier(num_classes=config['num_classes'],
architecture=config['architecture'])
evaluation_model.load_state_dict(torch.load(config['weights']))
else:
raise RuntimeError(
'No evaluation model stated in the config file.')
evaluation_model.eval()
self.evaluation_model = evaluation_model
return evaluation_model
def create_optimizer(self, params, config=None):
if config is None:
config = self._config['attack']['optimizer']
optimizer_config = self._config['attack']['optimizer']
for optimizer_type, args in optimizer_config.items():
if not hasattr(optim, optimizer_type):
raise Exception(
f'{optimizer_type} is no valid optimizer. Please write the type exactly as the PyTorch class'
)
optimizer_class = getattr(optim, optimizer_type)
optimizer = optimizer_class(params, **args)
break
return optimizer
def create_lr_scheduler(self, optimizer):
if not 'lr_scheduler' in self._config['attack']:
return None
scheduler_config = self._config['attack']['lr_scheduler']
for scheduler_type, args in scheduler_config.items():
if not hasattr(optim.lr_scheduler, scheduler_type):
raise Exception(
f'{scheduler_type} is no valid learning rate scheduler. Please write the type exactly as the PyTorch class.'
)
scheduler_class = getattr(optim.lr_scheduler, scheduler_type)
scheduler_instance = scheduler_class(optimizer, **args)
break
return scheduler_instance
def create_candidates(self, generator, target_model, targets):
candidate_config = self._config['candidates']
device = 'cuda' if torch.cuda.is_available() else 'cpu'
if 'candidate_file' in candidate_config:
candidate_file = candidate_config['candidate_file']
w = torch.load(candidate_file)
w = w[:self._config['num_candidates']]
w = w.to(device)
print(f'Loaded {w.shape[0]} candidates from {candidate_file}.')
return w
elif 'candidate_search' in candidate_config:
search_config = candidate_config['candidate_search']
w = find_initial_w(generator=generator,
target_model=target_model,
targets=targets,
seed=self.seed,
**search_config)
print(f'Created {w.shape[0]} candidates randomly in w space.')
else:
raise Exception(f'No valid candidate initialization stated.')
w = w.to(device)
return w
def create_target_vector(self):
device = 'cuda' if torch.cuda.is_available() else 'cpu'
attack_config = self._config['attack']
targets = None
target_classes = attack_config['targets']
num_candidates = self._config['candidates']['num_candidates']
if type(target_classes) is list:
targets = torch.tensor(target_classes)
targets = torch.repeat_interleave(targets, num_candidates)
elif target_classes == 'all':
targets = torch.tensor([i for i in range(self.model.num_classes)])
targets = torch.repeat_interleave(targets, num_candidates)
elif type(target_classes) == int:
targets = torch.full(size=(num_candidates, ),
fill_value=target_classes)
else:
raise Exception(
f' Please specify a target class or state a target vector.')
targets = targets.to(device)
return targets
def create_wandb_config(self):
for _, args in self.optimizer.items():
lr = args['lr']
break
config = {
**self.attack, 'optimizer': self.optimizer,
'lr': lr,
'use_scheduler': 'lr_scheduler' in self._config,
'target_architecture': self.model.architecture,
'target_extended': self.model.wandb_name,
'selection_method': self.final_selection['approach'],
'final_samples': self.final_selection['samples_per_target']
}
if 'lr_scheduler' in self._config:
config['lr_scheduler'] = self.lr_scheduler
return config
def create_attack_transformations(self):
transformation_list = []
if 'transformations' in self._config['attack']:
transformations = self._config['attack']['transformations']
for transform, args in transformations.items():
if not hasattr(T, transform):
raise Exception(
f'{transform} is no valid transformation. Please write the type exactly as the Torchvision class'
)
transformation_class = getattr(T, transform)
transformation_list.append(transformation_class(**args))
if len(transformation_list) > 0:
attack_transformations = T.Compose(transformation_list)
return attack_transformations
return None
@property
def candidates(self):
return self._config['candidates']
@property
def wandb_target_run(self):
return self._config['wandb_target_run']
@property
def logging(self):
return self._config['wandb']['enable_logging']
@property
def wandb_init_args(self):
return self._config['wandb']['wandb_init_args']
@property
def attack(self):
return self._config['attack']
@property
def wandb(self):
return self._config['wandb']
@property
def optimizer(self):
return self._config['attack']['optimizer']
@property
def lr_scheduler(self):
return self._config['attack']['lr_scheduler']
@property
def final_selection(self):
if 'final_selection' in self._config:
return self._config['final_selection']
else:
return None
@property
def stylegan_model(self):
return self._config['stylegan_model']
@property
def seed(self):
return self._config['seed']
@property
def cas_evaluation(self):
return self._config['cas_evaluation']
@property
def dataset(self):
return self._config['dataset']
@property
def fid_evaluation(self):
return self._config['fid_evaluation']
@property
def attack_center_crop(self):
if 'transformations' in self._config['attack']:
if 'CenterCrop' in self._config['attack']['transformations']:
return self._config['attack']['transformations']['CenterCrop'][
'size']
else:
return None
@property
def attack_resize(self):
if 'transformations' in self._config['attack']:
if 'Resize' in self._config['attack']['transformations']:
return self._config['attack']['transformations']['Resize'][
'size']
else:
return None
@property
def num_classes(self):
targets = self._config['attack']['targets']
if isinstance(targets, int):
return 1
else:
return len(targets)
@property
def log_progress(self):
if 'log_progress' in self._config['attack']:
return self._config['attack']['log_progress']
else:
return True