def train(save_dir='saved_weights',
parser_name='parser',
num_epochs=5,
max_iters=-1,
print_every_iters=10):
"""
Trains the model.
parser_name is the string prefix used for the filename where the parser is
saved after every epoch
"""
# load dataset
load_existing_dump = False
print('Loading dataset for training')
dataset = load_datasets(load_existing_dump)
config = dataset.model_config
print('Loading embeddings')
word_embeddings, pos_embeddings, dep_embeddings = load_embeddings(config)
if False:
# Switch to True if you want to print examples of feature types
print('words: ', len(dataset.word2idx))
print('examples: ',
[(k, v)
for i, (k, v) in enumerate(dataset.word2idx.items()) if i < 30])
print('\n')
print('POS-tags: ', len(dataset.pos2idx))
print(dataset.pos2idx)
print('\n')
print('dependencies: ', len(dataset.dep2idx))
print(dataset.dep2idx)
print('\n')
print("some hyperparameters")
print(vars(config))
# load parser object
parser = ParserModel(config, word_embeddings, pos_embeddings,
dep_embeddings)
device = torch.device(
"cuda") if torch.cuda.is_available() else torch.device("cpu")
parser.to(device)
# set save_dir for model
if not os.path.exists(save_dir):
os.makedirs(save_dir)
# create object for loss function
loss_fn = nn.CrossEntropyLoss()
# create object for an optimizer that updated the weights of parser model.
optimizer = torch.optim.SGD(parser.parameters(), lr=config.lr)
loss_list = []
acc_list = []
uas_list = []
for epoch in range(1, num_epochs + 1):
###### Training #####
# load training set in minibatches
for i, (train_x, train_y) in enumerate(get_minibatches([dataset.train_inputs,
dataset.train_targets], \
config.batch_size,
is_multi_feature_input=True)):
word_inputs_batch, pos_inputs_batch, dep_inputs_batch = train_x
# Convert the numpy data to pytorch's tensor represetation. They're
# numpy objects initially.
word_inputs_batch = torch.tensor(word_inputs_batch).to(device)
pos_inputs_batch = torch.tensor(pos_inputs_batch).to(device)
dep_inputs_batch = torch.tensor(dep_inputs_batch).to(device)
# Convert the labels from 1-hot vectors to a list of which index was
# 1, which is what Pytorch expects.
labels = np.argmax(train_y, axis=1)
# Convert the label to pytorch's tensor
labels = torch.tensor(labels)
if max_iters >= 0 and i > max_iters:
break
if i == 0 and epoch == 1:
print("size of word inputs: ", word_inputs_batch.size())
print("size of pos inputs: ", pos_inputs_batch.size())
print("size of dep inputs: ", dep_inputs_batch.size())
print("size of labels: ", labels.size())
#### Backprop & Update weights ####
# Before the backward pass, use the optimizer object to zero all of
# the gradients for the variables
optimizer.zero_grad()
# For the current batch of inputs, run a full forward pass through the
# data and get the outputs for each item's prediction.
# These are the raw outputs, which represent the activations for
# prediction over valid transitions.
outputs = parser(word_inputs_batch, pos_inputs_batch,
dep_inputs_batch) # TODO
# Compute the loss for the outputs with the labels.
loss = None
loss = loss_fn(outputs, labels)
# Backward pass: compute gradient of the loss with respect to model parameters
loss.backward()
# Perform 1 update using the optimizer
optimizer.step()
# Every 10 batches, print out some reporting so I can see convergence
if i % print_every_iters == 0:
print ('Epoch: %d [%d], loss: %1.3f, acc: %1.3f' \
% (epoch, i, loss.item(),
int((outputs.argmax(1)==labels).sum())/len(labels)))
print("End of epoch")
# save model
save_file = os.path.join(save_dir,
'%s-epoch-%d.mdl' % (parser_name, epoch))
print('Saving current state of model to %s' % save_file)
torch.save(parser, save_file)
###### Validation #####
print('Evaluating on valudation data after epoch %d' % epoch)
# Once we're in test/validation time, we need to indicate that we are in
# "evaluation" mode. This will turn off things like Dropout so that
# we're not randomly zero-ing out weights when it might hurt performance
parser.eval()
# Compute the current model's UAS score on the validation (development)
# dataset.
compute_dependencies(parser, device, dataset.valid_data, dataset)
valid_UAS = get_UAS(dataset.valid_data)
print("- validation UAS: {:.2f}".format(valid_UAS * 100.0))
loss_list.append(loss.item())
acc_list.append(int((outputs.argmax(1) == labels).sum()) / len(labels))
uas_list.append(valid_UAS * 100.0)
# Once we're done with test/validation, we need to indicate that we are back in
# "train" mode. This will turn back on things like Dropout
parser.train()
score = pd.DataFrame({'loss': loss_list, 'acc': acc_list, 'uas': uas_list})
score.to_csv(r"score.csv", index=True, header=True)
return parser
def train(save_dir='saved_weights',
parser_name='parser',
num_epochs=5,
max_iters=-1,
print_every_iters=10):
"""
Trains the model.
parser_name is the string prefix used for the filename where the parser is
saved after every epoch
"""
# load dataset
load_existing_dump = False
print('Loading dataset for training')
dataset = load_datasets(load_existing_dump)
# HINT: Look in the ModelConfig class for the model's hyperparameters
config = dataset.model_config
print('Loading embeddings')
word_embeddings, pos_embeddings, dep_embeddings = load_embeddings(config)
# TODO: For Optional Task, add Twitter and Wikipedia embeddings (do this last)
if False:
# Switch to True if you want to print examples of feature types
print('words: ', len(dataset.word2idx))
print('examples: ', [(k, v)
for i, (k,
v) in enumerate(dataset.word2idx.items())
if i < 30])
print('\n')
print('POS-tags: ', len(dataset.pos2idx))
print(dataset.pos2idx)
print('\n')
print('dependencies: ', len(dataset.dep2idx))
print(dataset.dep2idx)
print('\n')
print("some hyperparameters")
print(vars(config))
# load parser object (used for Task 2)
parser = ParserModel(config, word_embeddings, pos_embeddings, dep_embeddings)
# Uncomment the following parser for Task 3
# parser = AnotherParserModel(config, word_embeddings, pos_embeddings, dep_embeddings)
device = torch.device(
"cuda") if torch.cuda.is_available() else torch.device("cpu")
parser.to(device)
# set save_dir for model
if not os.path.exists(save_dir):
os.makedirs(save_dir)
# create object for loss function
loss_fn = F.cross_entropy
# create object for an optimizer that updated the weights of our parser
# model. Be sure to set the learning rate based on the parameters!
optimizer = optim.Adam(parser.parameters(), lr=config.lr)
for epoch in range(1, num_epochs + 1):
###### Training #####
# load training set in minibatches
for i, (train_x, train_y) in enumerate(get_minibatches([dataset.train_inputs,
dataset.train_targets], \
config.batch_size,
is_multi_feature_input=True)):
word_inputs_batch, pos_inputs_batch, dep_inputs_batch = train_x
# Convert the numpy data to pytorch's tensor represetation. They're
# numpy objects initially. NOTE: In general, when using Pytorch,
# you want to send them to the device that will do the computation
# (either a GPU or CPU). You do this by saying "obj.to(device)"
# where we've already created the device for you (see above where we
# did this for the parser). This ensures your data is running on
# the processor you expect it to!
word_inputs_batch = torch.from_numpy(np.array(word_inputs_batch)).to(device)
pos_inputs_batch = torch.from_numpy(np.array(pos_inputs_batch)).to(device)
dep_inputs_batch = torch.from_numpy(np.array(dep_inputs_batch)).to(device)
# Convert the labels from 1-hot vectors to a list of which index was
# 1, which is what Pytorch expects. HINT: look for the "argmax"
# function in numpy.
labels = np.argmax(train_y, axis=1)
# Convert the label to pytorch's tensor
labels = torch.from_numpy(labels).to(device)
# This is just a quick hack so you can cut training short to see how
# things are working. In the final model, make sure to use all the data!
if max_iters >= 0 and i > max_iters:
break
# Some debugging information for you
if i == 0 and epoch == 1:
print("size of word inputs: ", word_inputs_batch.size())
print("size of pos inputs: ", pos_inputs_batch.size())
print("size of dep inputs: ", dep_inputs_batch.size())
print("size of labels: ", labels.size())
#
#### Backprop & Update weights ####
#
# Before the backward pass, use the optimizer object to zero all of
# the gradients for the variables
optimizer.zero_grad()
# For the current batch of inputs, run a full forward pass through the
# data and get the outputs for each item's prediction.
# These are the raw outputs, which represent the activations for
# prediction over valid transitions.
outputs = parser.forward(word_inputs_batch, pos_inputs_batch, dep_inputs_batch)
# Compute the loss for the outputs with the labels. Note that for
# your particular loss (cross-entropy) it will compute the softmax
# for you, so you can safely pass in the raw activations.
loss = loss_fn(outputs, labels)
# Backward pass: compute gradient of the loss with respect to model parameters
loss.backward()
# Perform 1 update using the optimizer
optimizer.step()
# Every 10 batches, print out some reporting so we can see convergence
if i % print_every_iters == 0:
print ('Epoch: %d [%d], loss: %1.3f, acc: %1.3f' \
% (epoch, i, loss.item(),
int((outputs.argmax(1)==labels).sum())/len(labels)))
print("End of epoch")
# save model
save_file = os.path.join(save_dir, '%s-epoch-%d.mdl' % (parser_name,
epoch))
print('Saving current state of model to %s' % save_file)
torch.save(parser, save_file)
###### Validation #####
print('Evaluating on valudation data after epoch %d' % epoch)
# Once we're in test/validation time, we need to indicate that we are in
# "evaluation" mode. This will turn off things like Dropout so that
# we're not randomly zero-ing out weights when it might hurt performance
parser.eval()
# Compute the current model's UAS score on the validation (development)
# dataset. Note that we can use this held-out data to tune the
# hyper-parameters of the model but we should never look at the test
# data until we want to report the very final result.
compute_dependencies(parser, device, dataset.valid_data, dataset)
valid_UAS = get_UAS(dataset.valid_data)
print("- validation UAS: {:.2f}".format(valid_UAS * 100.0))
# Once we're done with test/validation, we need to indicate that we are back in
# "train" mode. This will turn back on things like Dropout
parser.train()
return parser
def train(save_dir='saved_weights',
parser_name='parser',
num_epochs=5,
max_iters=-1,
print_every_iters=10,
layer_num=1):
"""
Trains the model.
parser_name is the string prefix used for the filename where the parser is
saved after every epoch
"""
# load dataset
load_existing_dump = False
print('Loading dataset for training')
dataset = load_datasets(load_existing_dump)
# HINT: Look in the ModelConfig class for the model's hyperparameters
config = dataset.model_config
print('Loading embeddings')
word_embeddings, pos_embeddings, dep_embeddings = load_embeddings(config)
# TODO: For Task 3, add Twitter and Wikipedia embeddings (do this last)
if False:
# Switch to True if you want to print examples of feature types
print('words: ', len(dataset.word2idx))
print('examples: ', [(k, v) for i, (k, v) in enumerate(dataset.word2idx.items()) if i < 30])
print('\n')
print('POS-tags: ', len(dataset.pos2idx))
print(dataset.pos2idx)
print('\n')
print('dependencies: ', len(dataset.dep2idx))
print(dataset.dep2idx)
print('\n')
print("some hyperparameters")
print(vars(config))
# load parser object
if layer_num <= 1:
parser = ParserModel(config, word_embeddings, pos_embeddings, dep_embeddings)
else:
parser = MultiLayer_ParserModel(config, word_embeddings, pos_embeddings, dep_embeddings, layer_num)
device = torch.device("cuda") if torch.cuda.is_available() else torch.device("cpu")
parser.to(device)
# set save_dir for model
if not os.path.exists(save_dir):
os.makedirs(save_dir)
# create object for loss function
loss_fn = nn.CrossEntropyLoss()
# create object for an optimizer that updated the weights of our parser model
optimizer = torch.optim.Adam(parser.parameters(), lr=config.lr)
# initialize lists to plot data
loss_list, acc_list, uas_list = [], [], []
for epoch in range(1, num_epochs + 1):
###### Training #####
# load training set in minibatches
for i, (train_x, train_y) in enumerate(get_minibatches([dataset.train_inputs, dataset.train_targets], config.batch_size,
is_multi_feature_input=True)):
word_inputs_batch, pos_inputs_batch, dep_inputs_batch = train_x
# Convert the numpy data to pytorch's tensor represetation.
word_inputs_batch = torch.tensor(word_inputs_batch).to(device)
pos_inputs_batch = torch.tensor(pos_inputs_batch).to(device)
dep_inputs_batch = torch.tensor(dep_inputs_batch).to(device)
# Convert the labels from 1-hot vectors to a list of which index was 1, then to pytorch tensor
labels = torch.tensor(np.argmax(train_y, axis=1)).to(device)
# This is just a quick hack so you can cut training short to see how things are working
if max_iters >= 0 and i > max_iters:
break
# Some debugging information for you
if i == 0 and epoch == 1:
print("size of word inputs: ", word_inputs_batch.size())
print("size of pos inputs: ", pos_inputs_batch.size())
print("size of dep inputs: ", dep_inputs_batch.size())
print("size of labels: ", labels.size())
#### Backprop & Update weights ####
# Before the backward pass, use the optimizer object to zero all of the gradients for the variables
optimizer.zero_grad()
# For the current batch of inputs, run a full forward pass through the data and get the outputs for each item's prediction
outputs = parser(word_inputs_batch, pos_inputs_batch, dep_inputs_batch)
# Compute the loss for the outputs with the labels
loss = loss_fn(outputs, labels)
# Backward pass: compute gradient of the loss with respect to model parameters
loss.backward()
# Perform 1 update using the optimizer
optimizer.step()
# Every 10 batches, print out some reporting so we can see convergence
if i % print_every_iters == 0:
print ('Epoch: %d [%d], loss: %1.3f, acc: %1.3f' \
% (epoch, i, loss.item(),
int((outputs.argmax(1)==labels).sum())/len(labels)))
print("End of epoch")
# save model
save_file = os.path.join(save_dir, '%s-epoch-%d.mdl' % (parser_name,
epoch))
print('Saving current state of model to %s' % save_file)
torch.save(parser, save_file)
###### Validation #####
print('Evaluating on valudation data after epoch %d' % epoch)
# Once we're in test/validation time, we need to indicate that we are in "evaluation" mode
parser.eval()
# Compute the current model's UAS score on the validation (development) dataset
compute_dependencies(parser, device, dataset.valid_data, dataset)
valid_UAS = get_UAS(dataset.valid_data)
print("- validation UAS: {:.2f}".format(valid_UAS * 100.0))
# Append the computed values to plotting lists
loss_list.append(loss.item())
acc_list.append(int((outputs.argmax(1)==labels).sum())/len(labels))
uas_list.append(valid_UAS*100.0)
# Once we're done with test/validation, we need to indicate that we are back in "train" mode
parser.train()
# Plot the data!
epoch_size = np.arange(1, num_epochs + 1)
loss_plot = {"Epoch":epoch_size, "Loss":np.array(loss_list)}
seaborn.lineplot(x="Epoch", y="Loss", data=loss_plot)
plot.xlabel("Epoch")
plot.ylabel("Loss")
plot.title("Training Loss vs Time")
plot.show()
acc_plot = {"Epoch":epoch_size, "Accuracy":np.array(acc_list)}
seaborn.lineplot(x="Epoch", y="Accuracy", data=acc_plot)
plot.xlabel("Epoch")
plot.ylabel("Accuracy")
plot.title("Training Accuracy vs Time")
plot.show()
uas_plot = {"Epoch":epoch_size, "UAS":np.array(uas_list)}
seaborn.lineplot(x="Epoch", y="UAS", data=uas_plot)
plot.xlabel("Epoch")
plot.ylabel("UAS")
plot.title("Unlabeled Attachment Score vs Time")
plot.show()
return parser
