def train_multi(model, train_session_ids, val_session_ids):
train_data = list(datum for session_id in train_session_ids
for datum in dataset.get_session_data(
session_id, max_instances=FLAGS.limit_instances))
rng = random.Random(FLAGS.seed)
best_model = None
best_acc = None
for epoch in range(FLAGS.multi_epochs):
rng.shuffle(train_data)
train_stats = defaultdict(list)
it = tqdm.tqdm(train_data, ncols=80, desc=f'epoch {epoch}')
for state, language, target_output in it:
prediction = model.predict(state, language)
train_stats['is_correct'].append(1 if prediction ==
target_output else 0)
train_stats['losses'].append(
model.update(state, language, target_output))
it.set_postfix({
'train_acc': np.mean(train_stats['is_correct']),
'loss': np.mean(train_stats['losses'])
})
print('epoch {}\ttrain_overall_acc: {:.4f}\ttrain_loss: {:.4f}'.format(
epoch, np.mean(train_stats['is_correct']),
np.mean(train_stats['losses'])))
val_stats = test_sessions(model, val_session_ids, name='val')
# pprint.pprint(val_stats)
val_overall_acc = np.mean(val_stats['is_correct'])
val_avg_session_acc = np.mean(val_stats['session_accuracies'])
print('epoch {}\tval_overall_acc: {:.4f}\tval_avg_session_acc: {:.4f}'.
format(epoch, val_overall_acc, val_avg_session_acc))
if best_acc is None or val_overall_acc > best_acc:
print("new best in epoch {}".format(epoch))
best_model = pickle.loads(pickle.dumps(model))
best_acc = val_overall_acc
return best_model
def topKCandidatesAccuracyPlot(k, n):
start_time = datetime.now()
topKAccuracy = []
x = list(range(5,501))
for session_id in dataset.get_session_ids():
count = 0
model = Model()
for state, language, target_output in tqdm.tqdm(dataset.get_session_data(session_id)):
if count == 65:
break
tuple_state = tuple([tuple(state[i]) for i in range(len(state))])
tuple_target_output = tuple([tuple(target_output[i]) for i in range(len(target_output))])
tup = (tuple_state, language, tuple_target_output)
# Add top K candidates list for this (state, language, target output) to session_data
k_candidate_success = topKCandidatesPlot(state, language, target_output, model)
if topKAccuracy = []:
topKAccuracy = k_candidate_success
else:
topKAccuracy = [x + y for x, y in zip(topKAccuracy, k_candidate_success)]
# Update model, as is done in evaluate() in evaluate.py
model.update(state, language, target_output)
count += 1
break
def test_sessions(model, test_session_ids, name=''):
overall_stats = defaultdict(list)
for session_id in test_session_ids:
session_model = pickle.loads(pickle.dumps(model))
session_stats = test_data(
session_model,
list(
dataset.get_session_data(session_id,
max_instances=FLAGS.limit_instances)),
FLAGS.update_model_on_each_session,
)
if len(session_stats['is_correct']) > 0:
acc = np.mean(session_stats['is_correct'])
else:
acc = 0.0
for key, value in session_stats.items():
overall_stats[key] += value
overall_stats['session_accuracies'].append(acc)
print('{} number of examples: {}'.format(name,
len(overall_stats['is_correct'])))
print('{} number of correct examples: {}'.format(
name, np.sum(overall_stats['is_correct'])))
print('{} overall accuracy: {:.4f}'.format(
name, np.mean(overall_stats['is_correct'])))
print('{} number of sessions: {}'.format(
name, len(overall_stats['session_accuracies'])))
print('{} mean session accuracy: {:.4f}'.format(
name, np.mean(overall_stats['session_accuracies'])))
print('{} std session accuracy: {:.4f}'.format(
name, np.std(overall_stats['session_accuracies'])))
return overall_stats
def evaluate_batch(data_size, test_size=500):
results = []
for session_id in dataset.get_session_ids():
model = Model()
session_data = list(dataset.get_session_data(session_id))
assert len(session_data) > data_size+test_size
for state, language, target_output in session_data[:data_size]:
model.update(state, language, target_output, 0)
for i in range(50):
model.optimizer_step()
print(' training accuracy: %s%%' % (100*model.training_accuracy()))
total_correct = 0
total_examples = 0
for state, language, target_output in session_data[-test_size:]:
predicted = model.predict(state, language)
if predicted == target_output:
total_correct += 1
total_examples += 1
print(' test accuracy: %s%%' % (100*total_correct/total_examples))
results.append(total_correct/total_examples)
print('average test accuracy: %s%%' % (100*np.mean(results)))
def topKCandidatesAccuracyBatched(k, n):
# sessions will have key-value pairs of session_id, session_data
# sessions = dict()
for session_id in dataset.get_session_ids():
count = 0
number_accurate = 0
model = Model()
for state, language, target_output in tqdm.tqdm(dataset.get_session_data(session_id)):
if count == n:
break
tuple_state = tuple([tuple(state[i]) for i in range(len(state))])
tuple_target_output = tuple([tuple(target_output[i]) for i in range(len(target_output))])
tup = (tuple_state, language, tuple_target_output)
# Add top K candidates list for this (state, language, target output) to session_data
k_candidate_success = topKCandidatesHelper(k, state, language, target_output, model)
if k_candidate_success != float('inf'):
number_accurate += 1
# Update model, as is done in evaluate() in evaluate.py
model.update(state, language, target_output)
count += 1
print("Top K accuracy: " + str(number_accurate / count))
with open("dataset_sessions_top_k_accuracies.txt", 'a') as f:
f.write(str(datetime.now()-start_time) + " " + str(session_id) + " " + str(number_accurate/count) + " \n")
def __init__(self):
self.vocab = []
self.vocab_id_map = {}
self.vocab_index = Index()
self.feature_index = Index()
# tokenizer
special_cases = {
Vocabulary.START: [{
ORTH: Vocabulary.START
}],
Vocabulary.END: [{
ORTH: Vocabulary.END
}]
}
self.tokenizer = Tokenizer(English().vocab, rules=special_cases)
self.token_count = Counter()
for session_id in dataset.get_session_ids():
for (_, language, _) in dataset.get_session_data(session_id):
tokens = self.raw_tokens(language, unk=False)
self.token_count.update(tokens)
for token, count in self.token_count.most_common():
if count > FLAGS.unk_threshold:
self.vocab_index.index(token)
feature_count = Counter()
for session_id in dataset.get_session_ids():
for (_, language, _) in dataset.get_session_data(session_id):
# tokens = self.raw_tokens(language)
# for token in tokens:
# self.vocab_index.index(token)
features = self.raw_features(language)
feature_count.update(features)
for feature, count in feature_count.most_common():
self.feature_index.index(feature)
# print("vocab index size: {}".format(self.vocab_index.size()))
# print("feature index size: {}".format(self.feature_index.size()))
self.vocab_index.frozen = True
self.feature_index.frozen = True
def evaluate():
total_correct = 0
total_examples = 0
training_accuracies = []
start_time = datetime.now()
if not FLAGS.reset_model:
model = Model()
for session_id in dataset.get_session_ids():
if FLAGS.filter_session is not None and session_id != FLAGS.filter_session:
continue
if FLAGS.reset_model:
model = Model()
session_correct = 0
session_examples = 0
session_correct_list = []
session_data = list(dataset.get_session_data(session_id))
if not FLAGS.verbose:
session_data = tqdm.tqdm(session_data, ncols=80, desc=session_id)
for example_ix, (state, language,
target_output) in enumerate(session_data):
acc = session_correct / session_examples if session_examples > 0 else 0
if FLAGS.verbose:
print("{}: {} / {}\tacc: {:.4f}".format(
session_id, example_ix, len(session_data), acc))
else:
session_data.set_postfix({'acc': acc})
predicted = model.predict(state, language)
if predicted == target_output:
session_correct += 1
session_correct_list.append(1)
else:
session_correct_list.append(0)
session_examples += 1
model.update(state, language, target_output)
training_accuracies.append(model.training_accuracy())
# if session_examples > 2:
# return
if FLAGS.correctness_log is not None:
with open(FLAGS.correctness_log, 'a') as f:
f.write(' '.join(str(c) for c in session_correct_list) + '\n')
print("this accuracy: {} {} {}".format(
datetime.now() - start_time, session_id,
session_correct / session_examples))
total_correct += session_correct
total_examples += session_examples
print('overall accuracy: %s%%' % (100 * total_correct / total_examples))
print('average training accuracy: %s%%' %
(100 * np.mean(training_accuracies)))
def __init__(self):
self.vocab = []
self.vocab_id_map = {}
for session_id in dataset.get_session_ids():
for (_, language, _) in dataset.get_session_data(session_id):
tokens = language.split(' ')
for token in tokens:
if token not in self.vocab_id_map:
new_id = len(self.vocab)
self.vocab.append(token)
self.vocab_id_map[token] = new_id
def evaluate():
total_correct = 0
total_examples = 0
training_accuracies = []
start_time = datetime.now()
count = 0
for session_id in dataset.get_session_ids():
model = Model()
session_correct = 0
session_examples = 0
session_correct_list = []
session_data_count = 0
for state, language, target_output in tqdm.tqdm(dataset.get_session_data(session_id)):
print(str(count) + " : " + str(session_id) + " : " + str(session_data_count))
# print(state)
# print(language)
predicted = model.predict(state, language)
#print(predicted)
#print(target_output)
#print()
if predicted == target_output:
session_correct += 1
session_correct_list.append(1)
else:
session_correct_list.append(0)
session_examples += 1
model.update(state, language, target_output)
training_accuracies.append(model.training_accuracy())
session_data_count += 1
if FLAGS.correctness_log is not None:
with open(FLAGS.correctness_log, 'a') as f:
f.write(' '.join(str(c) for c in session_correct_list) + '\n')
count += 1
with open("dataset_sessions_accuracies.txt", 'a') as f:
f.write(str(datetime.now()-start_time) + " " + str(session_id) + " " + str(session_correct/session_examples) + " \n")
print(datetime.now()-start_time, session_id, session_correct/session_examples)
total_correct += session_correct
total_examples += session_examples
print('overall accuracy: %s%%' % (100*total_correct/total_examples))
print('average training accuracy: %s%%' % (100*np.mean(training_accuracies)))
def train_unmixed(model, train_session_ids, val_session_ids, updates='multi'):
rng = random.Random(FLAGS.seed)
best_model = None
best_acc = None
train_session_ids = sorted(train_session_ids)
assert updates in ['multi', 'reptile']
for epoch in range(FLAGS.multi_epochs):
rng.shuffle(train_session_ids)
train_stats = defaultdict(list)
if updates == 'reptile':
if FLAGS.reptile_anneal_beta:
reptile_beta = np.linspace(FLAGS.reptile_beta, 0,
FLAGS.multi_epochs)[epoch]
else:
reptile_beta = FLAGS.reptile_beta
print(f'epoch {epoch}: reptile_beta {reptile_beta}')
reptile_session_params = []
for session_ix, session_id in enumerate(
tqdm.tqdm(train_session_ids, ncols=80, desc=f'epoch {epoch}')):
if updates == 'multi':
# update the model
session_model = model
elif updates == 'reptile':
# update a copy
session_model = pickle.loads(pickle.dumps(model))
train_session_data = list(
dataset.get_session_data(session_id,
max_instances=FLAGS.limit_instances))
train_session_stats = test_data(session_model,
train_session_data,
update_model=True)
reptile_session_params.append(
session_model.linear.named_parameters())
session_acc = np.mean(train_session_stats['is_correct'])
train_stats['session_accuracies'].append(session_acc)
train_stats['is_correct'] += train_session_stats['is_correct']
train_stats['losses'] += train_session_stats['losses']
if updates == 'reptile' and (
(session_ix + 1) % FLAGS.reptile_meta_batch_size == 0
or session_ix == len(train_session_ids) - 1):
averaged = average_parameters(reptile_session_params)
# TODO: consider annealing the learning rate
interpolated = interpolate_parameters(
model.linear.named_parameters(),
averaged,
reptile_beta,
)
update_parameters(model.linear, interpolated)
reptile_session_params = []
print('epoch {}\ttrain_overall_acc: {:.4f}\ttrain_loss: {:.4f}'.format(
epoch, np.mean(train_stats['is_correct']),
np.mean(train_stats['session_accuracies']),
np.mean(train_stats['losses'])))
val_stats = test_sessions(model, val_session_ids, name='val')
# pprint.pprint(val_stats)
val_overall_acc = np.mean(val_stats['is_correct'])
val_avg_session_acc = np.mean(val_stats['session_accuracies'])
print('epoch {}\tval_overall_acc: {:.4f}\tval_avg_session_acc: {:.4f}'.
format(epoch, val_overall_acc, val_avg_session_acc))
if best_acc is None or val_overall_acc > best_acc:
print("new best in epoch {}".format(epoch))
best_model = pickle.loads(pickle.dumps(model))
best_acc = val_overall_acc
return best_model