INSTRUCTION stringlengths 1 8.43k | RESPONSE stringlengths 75 104k |
|---|---|
Replace out - of - vocab words with UNK. | def _replace_oov(original_vocab, line):
"""Replace out-of-vocab words with "UNK".
This maintains compatibility with published results.
Args:
original_vocab: a set of strings (The standard vocabulary for the dataset)
line: a unicode string - a space-delimited sequence of words.
Returns:
a unicode ... |
Download and unpack the corpus. | def _maybe_download_corpus(tmp_dir):
"""Download and unpack the corpus.
Args:
tmp_dir: directory containing dataset.
"""
corpus_url = ("http://www.statmt.org/lm-benchmark/"
"1-billion-word-language-modeling-benchmark-r13output.tar.gz")
corpus_filename = os.path.basename(corpus_url)
corp... |
Loss function. | def lossfn(real_input, fake_input, compress, hparams, lsgan, name):
"""Loss function."""
eps = 1e-12
with tf.variable_scope(name):
d1 = discriminator(real_input, compress, hparams, "discriminator")
d2 = discriminator(fake_input, compress, hparams, "discriminator",
reuse=True)
if... |
Cycle GAN main step used for training. | def cycle_gan_internal(inputs, targets, _, hparams):
"""Cycle GAN, main step used for training."""
with tf.variable_scope("cycle_gan"):
# Embed inputs and targets.
inputs_orig, targets_orig = tf.to_int32(inputs), tf.to_int32(targets)
inputs = common_layers.embedding(
inputs_orig, hparams.vocab_s... |
Set of hyperparameters. | def cycle_gan_small():
"""Set of hyperparameters."""
hparams = transformer_vae.transformer_ae_small()
hparams.batch_size = 2048
hparams.bottom = {
"inputs": modalities.identity_bottom,
"targets": modalities.identity_bottom,
}
hparams.top = {
"targets": modalities.identity_top,
}
hparam... |
Hparams for decoding. | def decode_hparams(overrides=""):
"""Hparams for decoding."""
hparams = decoding.decode_hparams()
# Number of interpolations between [0.0, 1.0].
hparams.add_hparam("num_interp", 11)
# Which level(s) to interpolate.
hparams.add_hparam("level_interp", [0, 1, 2])
# "all" or "ranked", interpolate all channels... |
Preprocess frame. | def preprocess_frame(frame):
"""Preprocess frame.
1. Converts [0, 255] to [-0.5, 0.5]
2. Adds uniform noise.
Args:
frame: 3-D Tensor representing pixels.
Returns:
frame: 3-D Tensor with values in between [-0.5, 0.5]
"""
# Normalize from [0.0, 1.0] -> [-0.5, 0.5]
frame = common_layers.convert_r... |
Encode frames to latents. | def frame_to_latents(frame, hparams):
"""Encode frames to latents."""
# Preprocess
frame = preprocess_frame(frame)
# Encode [X_t] to [z^1_t, z^2_t .. z^l_t]
glow_vals = glow_ops.encoder_decoder(
"codec", frame, hparams, eps=None, reverse=False)
z_top, _, level_eps, _, _ = glow_vals
return z_top, le... |
Decodes latents to frames. | def latents_to_frames(z_top_interp, level_eps_interp, hparams):
"""Decodes latents to frames."""
# Decode [z^1_t, z^2_t .. z^l_t] to [X_t]
images, _, _, _ = glow_ops.encoder_decoder(
"codec", z_top_interp, hparams, eps=level_eps_interp, reverse=True)
images = glow_ops.postprocess(images)
return images |
Interpolate between the first input frame and last target frame. | def interpolate(features, hparams, decode_hp):
"""Interpolate between the first input frame and last target frame.
Args:
features: dict of tensors
hparams: HParams, training hparams.
decode_hp: HParams, decode hparams.
Returns:
images: interpolated images, 4-D Tensor, shape=(num_interp, H, W, C)
... |
Get nested summaries_log_dir based on decode_hp. | def get_summaries_log_dir(decode_hp, output_dir, dataset_split):
"""Get nested summaries_log_dir based on decode_hp."""
child_dir = decode_hp.summaries_log_dir
level_dir = "".join([str(level) for level in decode_hp.level_interp])
if decode_hp.channel_interp == "all":
rank_dir = "all"
else:
rank_dir = ... |
Converts interpolated frames into tf summaries. | def interpolations_to_summary(sample_ind, interpolations, first_frame,
last_frame, hparams, decode_hp):
"""Converts interpolated frames into tf summaries.
The summaries consists of:
1. Image summary corresponding to the first frame.
2. Image summary corresponding to the last f... |
EPVA hparams. | def next_frame_epva():
"""EPVA hparams."""
hparams = basic_deterministic_params.next_frame_basic_deterministic()
hparams.video_num_input_frames = 4
hparams.video_num_target_frames = 4
hparams.bottom = {
"inputs": modalities.video_raw_bottom,
"targets": modalities.video_raw_targets_bottom,
}
hp... |
Create slot variables for Adam with accumulated gradients. | def _create_slots(self, var_list):
"""Create slot variables for Adam with accumulated gradients."""
super(MultistepAdamOptimizer, self)._create_slots(var_list)
first_var = min(var_list, key=lambda x: x.name)
self._create_non_slot_variable(initial_value=0 if self._n == 1 else 1,
... |
Apply conditionally if counter is zero. | def _apply_cond(self, apply_fn, grad, var, *args, **kwargs):
"""Apply conditionally if counter is zero."""
grad_acc = self.get_slot(var, "grad_acc")
def apply_adam(grad_acc, apply_fn, grad, var, *args, **kwargs):
total_grad = (grad_acc + grad) / tf.cast(self._n_t, grad.dtype)
adam_op = apply_fn... |
Updates beta_power variables every n batches and incrs counter. | def _finish(self, update_ops, name_scope):
"""Updates beta_power variables every n batches and incrs counter."""
iter_ = self._get_iter_variable()
beta1_power, beta2_power = self._get_beta_accumulators()
with tf.control_dependencies(update_ops):
with tf.colocate_with(iter_):
def update_be... |
A stack of transformer layers. | def transformer_revnet_encoder(encoder_input,
encoder_self_attention_bias,
hparams,
name="encoder"):
"""A stack of transformer layers.
Args:
encoder_input: a Tensor
encoder_self_attention_bias: bias Tensor for self... |
A stack of transformer layers. | def transformer_revnet_decoder(decoder_input,
encoder_output,
decoder_self_attention_bias,
encoder_decoder_attention_bias,
hparams,
name="decoder"):
"""A stack of ... |
Base hparams for TransformerRevnet. | def transformer_revnet_base():
"""Base hparams for TransformerRevnet."""
hparams = transformer.transformer_big()
# Use settings from transformer_n_da
hparams.layer_preprocess_sequence = "n"
hparams.layer_postprocess_sequence = "da"
hparams.learning_rate = 0.4
return hparams |
Base hparams for TransformerRevnet. | def transformer_revnet_big():
"""Base hparams for TransformerRevnet."""
hparams = transformer_revnet_base()
# The TransformerRevnet uses significantly less memory than the Transformer.
# Increase batch size and model size.
hparams.batch_size *= 2
hparams.hidden_size *= 2
hparams.num_heads *= 2
hparams.... |
Over which devices do we split each training batch. | def data_parallelism_from_flags(daisy_chain_variables=True, all_workers=False):
"""Over which devices do we split each training batch.
In old-fashioned async mode, we split the batch over all GPUs on the
current worker.
In sync mode, we split the batch over all the parameter server GPUs.
This function retu... |
See data_parallelism_from_flags. | def data_parallelism(daisy_chain_variables=True,
all_workers=False,
ps_replicas=0,
ps_job="/job:ps",
ps_gpu=0,
schedule="continuous_train_and_eval",
sync=False,
worker_gpu=1... |
Generate concatenated lines from file upto up_threshold characters. | def concat_generator(filename, up_threshold, low_threshold=10):
"""Generate concatenated lines from file upto up_threshold characters."""
txt = ""
for line in tf.gfile.Open(filename):
line = line.strip()
if len(txt) + len(line) + 1 >= up_threshold:
ret = txt
txt = ""
# We don't yield ver... |
Given python generators generate from one then from another etc. | def mix_generators(generator_list):
"""Given python generators, generate from one, then from another, etc."""
i = 0
l = len(generator_list)
stopiters_seen = 0
while stopiters_seen <= l:
try:
yield six.next(generator_list[i % l])
i += 1
stopiters_seen = 0
except StopIteration:
i... |
Compute BLEU core summaries using the decoder output. | def compute_bleu_summaries(hook_args):
"""Compute BLEU core summaries using the decoder output.
Args:
hook_args: DecodeHookArgs namedtuple
Returns:
A list of tf.Summary values if hook_args.hparams contains the
reference file and the translated file.
"""
decode_hparams = hook_args.decode_hparams
... |
Preprocessing to strip tags in SGM files. | def _preprocess_sgm(line, is_sgm):
"""Preprocessing to strip tags in SGM files."""
if not is_sgm:
return line
# In SGM files, remove <srcset ...>, <p>, <doc ...> lines.
if line.startswith("<srcset") or line.startswith("</srcset"):
return ""
if line.startswith("<doc") or line.startswith("</doc"):
r... |
Concatenates all datasets and saves to filename. | def compile_data(tmp_dir, datasets, filename, datatypes_to_clean=None):
"""Concatenates all `datasets` and saves to `filename`."""
datatypes_to_clean = datatypes_to_clean or []
filename = os.path.join(tmp_dir, filename)
lang1_fname = filename + ".lang1"
lang2_fname = filename + ".lang2"
if tf.gfile.Exists(l... |
Get vocab for distill problems. | def get_or_create_vocab(self, data_dir, tmp_dir, force_get=False):
"""Get vocab for distill problems."""
# We assume that vocab file is present in data_dir directory where the
# data generated will be stored.
vocab_filepath = os.path.join(data_dir, self.vocab_filename)
encoder = text_encoder.Subword... |
Set hparams overrides from unparsed args list. | def set_hparams_from_args(args):
"""Set hparams overrides from unparsed args list."""
if not args:
return
hp_prefix = "--hp_"
tf.logging.info("Found unparsed command-line arguments. Checking if any "
"start with %s and interpreting those as hparams "
"settings.", hp_pref... |
Create hparams. | def create_hparams():
"""Create hparams."""
if FLAGS.use_tpu and "tpu" not in FLAGS.hparams_set:
tf.logging.warn("Not all hyperparameter sets work on TPU. "
"Prefer hparams_sets with a '_tpu' suffix, "
"e.g. transformer_tpu, if available for your model.")
hparams_path =... |
Create a run config. | def create_run_config(hp, output_dir=None):
"""Create a run config.
Args:
hp: model hyperparameters
output_dir: model's output directory, defaults to output_dir flag.
Returns:
a run config
"""
save_ckpt_steps = max(FLAGS.iterations_per_loop, FLAGS.local_eval_frequency)
save_ckpt_secs = FLAGS.s... |
Saves FLAGS and hparams to output_dir. | def save_metadata(hparams):
"""Saves FLAGS and hparams to output_dir."""
output_dir = os.path.expanduser(FLAGS.output_dir)
if not tf.gfile.Exists(output_dir):
tf.gfile.MakeDirs(output_dir)
# Save FLAGS in txt file
if hasattr(FLAGS, "flags_into_string"):
flags_str = FLAGS.flags_into_string()
t2t_f... |
A stack of convolution blocks with residual connection. | def residual_block(x, hparams):
"""A stack of convolution blocks with residual connection."""
k = (hparams.kernel_height, hparams.kernel_width)
dilations_and_kernels = [((1, 1), k) for _ in range(3)]
y = common_layers.subseparable_conv_block(
x,
hparams.hidden_size,
dilations_and_kernels,
... |
Xception body. | def xception_internal(inputs, hparams):
"""Xception body."""
with tf.variable_scope("xception"):
cur = inputs
if cur.get_shape().as_list()[1] > 200:
# Large image, Xception entry flow
cur = xception_entry(cur, hparams.hidden_size)
else:
# Small image, conv
cur = common_layers.co... |
Xception entry flow. | def xception_entry(inputs, hidden_dim):
"""Xception entry flow."""
with tf.variable_scope("xception_entry"):
def xnet_resblock(x, filters, res_relu, name):
"""Resblock."""
with tf.variable_scope(name):
y = common_layers.separable_conv_block(
x,
filters, [((1, 1), (3,... |
Xception exit flow. | def xception_exit(inputs):
"""Xception exit flow."""
with tf.variable_scope("xception_exit"):
x = inputs
x_shape = x.get_shape().as_list()
if x_shape[1] is None or x_shape[2] is None:
length_float = tf.to_float(tf.shape(x)[1])
length_float *= tf.to_float(tf.shape(x)[2])
spatial_dim_flo... |
Returns a plaintext representation of HTML content. | def get_text_from_html(html):
"""Returns a plaintext representation of HTML content."""
try:
soup = bs4.BeautifulSoup(html, "html.parser")
except: # pylint: disable=bare-except
# Some docs don't parse
return ""
# Remove script and style tags
for s in soup(["script", "style"]):
s.decompose()
... |
Return text strings in soup. | def _soup_strings(soup):
"""Return text strings in soup."""
paragraph_tags = set([
"caption", "details", "h1", "h2", "h3", "h4", "h5", "h6", "li", "p", "td",
"div", "span"
])
skip_children = None
for descendant in soup.descendants:
# If we've treated a tag as a contiguous paragraph, don't re-... |
Set of hyperparameters. | def image_transformer_base():
"""Set of hyperparameters."""
hparams = common_hparams.basic_params1()
hparams.hidden_size = 512
hparams.batch_size = 4
hparams.max_length = 3075
hparams.dropout = 0.0
hparams.clip_grad_norm = 0. # i.e. no gradient clipping
hparams.optimizer_adam_epsilon = 1e-9
hparams.l... |
Best config for 2. 90 bits/ dim on CIFAR10 using cross entropy. | def imagetransformer_cifar10_base():
"""Best config for 2.90 bits/dim on CIFAR10 using cross entropy."""
hparams = image_transformer_base()
hparams.batch_size = 4
hparams.num_heads = 4
hparams.num_decoder_layers = 12
hparams.block_length = 256
hparams.hidden_size = 512
hparams.filter_size = 2048
hpara... |
Best config for 2. 90 bits/ dim on CIFAR10 using DMOL. | def imagetransformer_cifar10_base_dmol():
"""Best config for 2.90 bits/dim on CIFAR10 using DMOL."""
hparams = image_transformer_base()
hparams.likelihood = cia.DistributionType.DMOL
hparams.num_channels = 1
hparams.bottom["targets"] = modalities.image_channel_compress_targets_bottom
hparams.top["targets"] ... |
Transformer base params for cifar - 10. | def imagetransformer_base_tpu():
"""Transformer base params for cifar-10."""
hparams = imagetransformer_bas8l_8h_big_uncond_dr03_imgnet()
update_hparams_for_tpu(hparams)
hparams.batch_size = 4
hparams.num_heads = 4 # heads are expensive on tpu
hparams.num_decoder_layers = 12
hparams.block_length = 128
... |
Transformer base params for cifar - 10. | def imagetransformer_base_imagenet_tpu():
"""Transformer base params for cifar-10."""
hparams = imagetransformer_base_tpu()
hparams.batch_size = 4
hparams.num_heads = 4 # heads are expensive on tpu
hparams.num_decoder_layers = 12
hparams.block_length = 128
hparams.layer_preprocess_sequence = "none"
hp... |
separate rgb embeddings. | def imagetransformer_sep_channels():
"""separate rgb embeddings."""
hparams = imagetransformer_base()
hparams.num_heads = 4
hparams.attention_key_channels = hparams.attention_value_channels = 0
hparams.hidden_size = 256
hparams.filter_size = 512
hparams.num_hidden_layers = 6
return hparams |
separate rgb embeddings. | def imagetransformer_sep_channels_8l():
"""separate rgb embeddings."""
hparams = imagetransformer_base()
hparams.num_heads = 4
hparams.attention_key_channels = hparams.attention_value_channels = 0
hparams.hidden_size = 256
hparams.filter_size = 256
hparams.num_hidden_layers = 8
hparams.sampling_method =... |
big 1d model for conditional image generation. 2. 99 on cifar10. | def imagetransformer_base_8l_8h_big_cond_dr03_dan():
"""big 1d model for conditional image generation.2.99 on cifar10."""
hparams = imagetransformer_sep_channels_8l()
hparams.block_width = 256
hparams.block_length = 256
hparams.hidden_size = 512
hparams.num_heads = 8
hparams.filter_size = 2048
hparams.b... |
big 1d model for unconditional generation on imagenet. | def imagetransformer_base_10l_8h_big_uncond_dr03_dan_64():
"""big 1d model for unconditional generation on imagenet."""
hparams = imagetransformer_base_10l_8h_big_cond_dr03_dan()
hparams.unconditional = True
hparams.max_length = 14000
hparams.batch_size = 1
hparams.img_len = 64
hparams.layer_prepostproces... |
separate rgb embeddings. | def imagetransformerpp_sep_channels_8l_8h():
"""separate rgb embeddings."""
hparams = imagetransformer_base()
hparams.likelihood = cia.DistributionType.DMOL
hparams.num_channels = 1
hparams.bottom["targets"] = modalities.image_channel_compress_targets_bottom
hparams.top["targets"] = modalities.identity_top
... |
big 1d model for conditional image generation. 2. 99 on cifar10. | def imagetransformerpp_base_8l_8h_big_cond_dr03_dan():
"""big 1d model for conditional image generation.2.99 on cifar10."""
hparams = imagetransformerpp_sep_channels_8l_8h()
hparams.hidden_size = 512
hparams.num_heads = 8
hparams.filter_size = 2048
hparams.batch_size = 4
hparams.max_length = 3075
hparam... |
Gets to 2. 92 in just under 4 days on 8 p100s. | def imagetransformerpp_base_14l_8h_big_uncond_dr03_dan_p():
"""Gets to 2.92 in just under 4 days on 8 p100s."""
hparams = imagetransformerpp_base_12l_8h_big_uncond_dr03_dan_l()
hparams.num_decoder_layers = 14
hparams.batch_size = 8
hparams.layer_prepostprocess_dropout = 0.2
return hparams |
For 256x256. | def imagetransformerpp_base_5l_8h_big_uncond_dr00_dan_g_bs1():
"""For 256x256."""
hparams = imagetransformerpp_base_10l_8h_big_uncond_dr03_dan_g()
# TODO(trandustin): I forgot to set this in the runs! Maybe it's not used in
# image transformer training implementation?
# hparams.img_len = 256
hparams.max_len... |
Dilated hparams. | def imagetransformer_base_8l_8h_big_cond_dr03_dan_dilated():
"""Dilated hparams."""
hparams = imagetransformer_base_8l_8h_big_cond_dr03_dan()
hparams.gap_sizes = [0, 16, 64, 0, 16, 64, 128, 0]
hparams.dec_attention_type = cia.AttentionType.DILATED
hparams.block_length = 128
hparams.block_width = 128
hpara... |
big 1d model for conditional image generation. | def imagetransformer_base_12l_8h_big():
"""big 1d model for conditional image generation."""
hparams = imagetransformer_sep_channels_8l_8h()
hparams.filter_size = 1024
hparams.num_decoder_layers = 12
hparams.batch_size = 1
hparams.hidden_size = 512
hparams.learning_rate_warmup_steps = 4000
hparams.sampl... |
hparams fo 12 layer big 1d model for imagenet 64x64. | def imagetransformer1d_base_8l_64by64():
"""hparams fo 12 layer big 1d model for imagenet 64x64."""
hparams = image_transformer_base()
hparams.num_heads = 8
hparams.hidden_size = 512
hparams.filter_size = 2048
hparams.num_decoder_layers = 8
hparams.batch_size = 1
hparams.block_length = 512
hparams.blo... |
separate rgb embeddings. | def imagetransformer_sep_channels_12l_16h_imagenet_large():
"""separate rgb embeddings."""
hparams = imagetransformer_sep_channels_8l_8h()
hparams.num_hidden_layers = 12
hparams.batch_size = 1
hparams.filter_size = 2048
hparams.num_heads = 16
hparams.learning_rate_warmup_steps = 16000
hparams.sampling_m... |
separate rgb embeddings. | def imagetransformer_sep_channels_16l_16h_imgnet_lrg_loc():
"""separate rgb embeddings."""
hparams = imagetransformer_sep_channels_12l_16h_imagenet_large()
hparams.num_hidden_layers = 16
hparams.local_attention = True
hparams.batch_size = 1
hparams.block_length = 256
return hparams |
separate rgb embeddings. | def imagetransformer_sep_channels_16l_16h_imgnet_lrg_loc_128():
"""separate rgb embeddings."""
hparams = imagetransformer_sep_channels_12l_16h_imagenet_large()
hparams.num_hidden_layers = 16
hparams.local_attention = True
hparams.batch_size = 1
hparams.block_length = 128
return hparams |
big 1d model for conditional image generation. | def imagetransformer_base_10l_16h_big_uncond_dr01_imgnet():
"""big 1d model for conditional image generation."""
hparams = imagetransformer_base_14l_8h_big_dr01()
# num_hidden_layers
hparams.num_decoder_layers = 10
hparams.num_heads = 16
hparams.hidden_size = 1024
hparams.filter_size = 4096
hparams.batc... |
big 1d model for conditional image generation. | def imagetransformer_base_10l_16h_big_dr01_imgnet():
"""big 1d model for conditional image generation."""
hparams = imagetransformer_base_14l_8h_big_dr01()
# num_hidden_layers
hparams.num_decoder_layers = 10
hparams.num_heads = 16
hparams.hidden_size = 1024
hparams.filter_size = 4096
hparams.batch_size ... |
separate rgb embeddings. | def imagetransformer_sep_channels_8l_8h():
"""separate rgb embeddings."""
hparams = imagetransformer_base()
hparams.num_heads = 8
hparams.batch_size = 1
hparams.attention_key_channels = hparams.attention_value_channels = 0
hparams.hidden_size = 512
hparams.filter_size = 512
hparams.num_hidden_layers = 8... |
separate rgb embeddings. | def imagetransformer_sep_channels_8l_8h_local_and_global_att():
"""separate rgb embeddings."""
hparams = imagetransformer_sep_channels_8l_8h()
hparams.num_heads = 8
hparams.batch_size = 1
hparams.attention_key_channels = hparams.attention_value_channels = 0
hparams.hidden_size = 256
hparams.filter_size = ... |
big 1d model for conditional image generation. | def imagetransformer_bas8l_8h_big_uncond_dr03_imgnet():
"""big 1d model for conditional image generation."""
hparams = imagetransformer_base_14l_8h_big_dr01()
# num_hidden_layers
hparams.num_decoder_layers = 8
hparams.num_heads = 8
hparams.hidden_size = 512
hparams.filter_size = 2048
hparams.layer_prepo... |
big 1d model for conditional image generation. | def imagetransformer_base_10l_16h_big_dr01_moe_imgnet():
"""big 1d model for conditional image generation."""
hparams = imagetransformer_base_10l_16h_big_dr01_imgnet()
hparams.initializer = "orthogonal"
hparams.learning_rate_warmup_steps = 16000
hparams.add_hparam("moe_layers_decoder", "2,7") # Which layer i... |
Set of hyperparameters for a very small imagetransformer with MoE. | def imagetransformer_moe_tiny():
"""Set of hyperparameters for a very small imagetransformer with MoE."""
hparams = imagetransformer_tiny()
hparams.hidden_size = 64
hparams.batch_size = 1
hparams.num_hidden_layers = 3
hparams.dec_attention_type = cia.AttentionType.MOE_LOCAL_1D
hparams.add_hparam("moe_laye... |
Hparams for training imagetransformer on tpu. | def imagetransformer_sep_channels_8l_tpu():
"""Hparams for training imagetransformer on tpu."""
hparams = imagetransformer_sep_channels_8l()
update_hparams_for_tpu(hparams)
hparams.batch_size = 4
hparams.num_heads = 4 # heads are expensive on tpu
hparams.shared_embedding_and_softmax_weights = False
retu... |
Small model for tpu cifar 10. | def imagetransformer_b10l_4h_big_uncond_dr03_tpu():
"""Small model for tpu cifar 10."""
hparams = imagetransformer_bas8l_8h_big_uncond_dr03_imgnet()
update_hparams_for_tpu(hparams)
hparams.batch_size = 4
hparams.num_heads = 4 # heads are expensive on tpu
hparams.num_decoder_layers = 10
hparams.block_len... |
Moe tpu params. | def imagetransformer_b10l_dr03_moe_tpu():
"""Moe tpu params."""
hparams = imagetransformer_b10l_4h_big_uncond_dr03_tpu()
update_hparams_for_tpu(hparams)
hparams.batch_size = 4
hparams.num_heads = 4 # heads are expensive on tpu
hparams.num_decoder_layers = 10
hparams.layer_preprocess_sequence = "none"
... |
TPU related small model. | def imagetransformer_b10l_4h_big_uncond_dr03_lr025_tpu():
"""TPU related small model."""
hparams = imagetransformer_bas8l_8h_big_uncond_dr03_imgnet()
update_hparams_for_tpu(hparams)
hparams.batch_size = 4
hparams.num_heads = 4 # heads are expensive on tpu
hparams.num_decoder_layers = 10
hparams.learning... |
works very well on 4x4. | def imagetransformer_b12l_4h_b256_uncond_dr03_tpu():
"""works very well on 4x4."""
hparams = imagetransformer_bas8l_8h_big_uncond_dr03_imgnet()
update_hparams_for_tpu(hparams)
hparams.batch_size = 4
hparams.num_heads = 4 # heads are expensive on tpu
hparams.num_decoder_layers = 12
hparams.block_length =... |
works very well on 4x4. | def imagetransformer_b12l_4h_b256_uncond_dr03_rel_tpu():
"""works very well on 4x4."""
hparams = imagetransformer_b12l_4h_b256_uncond_dr03_tpu()
hparams.shared_rel = True
hparams.dec_attention_type = cia.AttentionType.RELATIVE_LOCAL_1D
return hparams |
Range of hyperparameters for vizier. | def imagetransformer_cifar_tpu_range(rhp):
"""Range of hyperparameters for vizier."""
# After starting from base, set intervals for some parameters.
rhp.set_float("learning_rate", 0.01, 1.0, scale=rhp.LOG_SCALE)
rhp.set_discrete("num_decoder_layers", [8, 10, 12, 14, 16])
rhp.set_discrete("hidden_size", [256, ... |
TPU related imagenet model. | def imagetransformer_b12l_4h_b128_h512_uncond_dr01_im():
"""TPU related imagenet model."""
hparams = imagetransformer_b12l_4h_b256_uncond_dr03_tpu()
update_hparams_for_tpu(hparams)
hparams.batch_size = 4
hparams.optimizer = "Adafactor"
hparams.learning_rate_schedule = "rsqrt_decay"
hparams.learning_rate_w... |
TPU related small model. | def imagetransformer_b12l_4h_uncond_dr03_tpu():
"""TPU related small model."""
hparams = imagetransformer_b12l_4h_b256_uncond_dr03_tpu()
hparams.learning_rate = 0.2
hparams.learning_rate_warmup_steps = 4000
hparams.layer_preprocess_sequence = "none"
hparams.layer_postprocess_sequence = "dan"
hparams.layer... |
TPU config for cifar 10. | def imagetransformer_b12l_4h_b128_uncond_dr03_tpu():
"""TPU config for cifar 10."""
hparams = imagetransformer_bas8l_8h_big_uncond_dr03_imgnet()
update_hparams_for_tpu(hparams)
hparams.batch_size = 2
hparams.num_heads = 4 # heads are expensive on tpu
hparams.num_decoder_layers = 12
hparams.block_length ... |
TPU related 12 layer 8 heads model. | def imagetransformer_b12l_8h_b256_uncond_dr03_tpu():
"""TPU related 12 layer 8 heads model."""
hparams = imagetransformer_bas8l_8h_big_uncond_dr03_imgnet()
update_hparams_for_tpu(hparams)
hparams.batch_size = 2
hparams.num_heads = 8 # heads are expensive on tpu
hparams.num_decoder_layers = 12
hparams.bl... |
big 1d model for conditional image generation. | def imagetransformer_b10l_4h_big_uncond_dr01_tpu():
"""big 1d model for conditional image generation."""
hparams = imagetransformer_b12l_4h_big_uncond_dr03_tpu()
# num_hidden_layers
hparams.num_decoder_layers = 10
hparams.num_heads = 4
hparams.hidden_size = 1024
hparams.filter_size = 4096
hparams.batch_... |
Context manager wrapping the training loop updates step counters. | def training_loop(self):
"""Context manager wrapping the training loop, updates step counters."""
if not self.restarting:
self._write_counters(self._local_step_at_start, self._global_step)
tf.logging.info(
"Training %s up to %d, %d to go", self.model_mode,
self.target_local_step, self... |
Reads words from a file. | def _read_words(filename):
"""Reads words from a file."""
with tf.gfile.GFile(filename, "r") as f:
if sys.version_info[0] >= 3:
return f.read().replace("\n", " %s " % EOS).split()
else:
return f.read().decode("utf-8").replace("\n", " %s " % EOS).split() |
Reads a file to build a vocabulary of vocab_size most common words. | def _build_vocab(filename, vocab_path, vocab_size):
"""Reads a file to build a vocabulary of `vocab_size` most common words.
The vocabulary is sorted by occurrence count and has one word per line.
Originally from:
https://github.com/tensorflow/models/blob/master/tutorials/rnn/ptb/reader.py
Args:
file... |
Reads from file and returns a TokenTextEncoder for the vocabulary. | def _get_token_encoder(vocab_dir, vocab_name, filename):
"""Reads from file and returns a `TokenTextEncoder` for the vocabulary."""
vocab_path = os.path.join(vocab_dir, vocab_name)
if not tf.gfile.Exists(vocab_path):
_build_vocab(filename, vocab_path, 10000)
return text_encoder.TokenTextEncoder(vocab_path) |
Download and unpack the corpus. | def _maybe_download_corpus(tmp_dir, vocab_type):
"""Download and unpack the corpus.
Args:
tmp_dir: directory containing dataset.
vocab_type: which vocabulary are we using.
Returns:
The list of names of files.
"""
filename = os.path.basename(PTB_URL)
compressed_filepath = generator_utils.maybe_... |
Normalize attention matrices and reshape as necessary. | def resize(att_mat, max_length=None):
"""Normalize attention matrices and reshape as necessary."""
for i, att in enumerate(att_mat):
# Add extra batch dim for viz code to work.
if att.ndim == 3:
att = np.expand_dims(att, axis=0)
if max_length is not None:
# Sum across different attention val... |
Compute representation of the attention ready for the d3 visualization. | def _get_attention(inp_text, out_text, enc_atts, dec_atts, encdec_atts):
"""Compute representation of the attention ready for the d3 visualization.
Args:
inp_text: list of strings, words to be displayed on the left of the vis
out_text: list of strings, words to be displayed on the right of the vis
enc_... |
Decode a list of tokens to a unicode string. | def decode(tokens):
"""Decode a list of tokens to a unicode string.
Args:
tokens: a list of Unicode strings
Returns:
a unicode string
"""
token_is_alnum = [t[0] in _ALPHANUMERIC_CHAR_SET for t in tokens]
ret = []
for i, token in enumerate(tokens):
if i > 0 and token_is_alnum[i - 1] and token_... |
Reads files matching a wildcard pattern yielding the contents. | def _read_filepattern(filepattern, max_lines=None, split_on_newlines=True):
"""Reads files matching a wildcard pattern, yielding the contents.
Args:
filepattern: A wildcard pattern matching one or more files.
max_lines: If set, stop reading after reading this many lines.
split_on_newlines: A boolean. I... |
Read the corpus and compute a dictionary of token counts. | def corpus_token_counts(
text_filepattern, corpus_max_lines, split_on_newlines=True):
"""Read the corpus and compute a dictionary of token counts.
Args:
text_filepattern: A pattern matching one or more files.
corpus_max_lines: An integer; maximum total lines to read.
split_on_newlines: A boolean. I... |
Read a vocab file and return a dictionary of token counts. | def vocab_token_counts(text_filepattern, max_lines):
"""Read a vocab file and return a dictionary of token counts.
Reads a two-column CSV file of tokens and their frequency in a dataset. The
tokens are presumed to be generated by encode() or the equivalent.
Args:
text_filepattern: A pattern matching one o... |
Make a tf. train. Example for the problem. | def _make_example(input_ids, problem, input_feature_name="inputs"):
"""Make a tf.train.Example for the problem.
features[input_feature_name] = input_ids
Also fills in any other required features with dummy values.
Args:
input_ids: list<int>.
problem: Problem.
input_feature_name: name of feature f... |
Wraps function to make grpc requests with runtime args. | def make_grpc_request_fn(servable_name, server, timeout_secs):
"""Wraps function to make grpc requests with runtime args."""
stub = _create_stub(server)
def _make_grpc_request(examples):
"""Builds and sends request to TensorFlow model server."""
request = predict_pb2.PredictRequest()
request.model_sp... |
Wraps function to make CloudML Engine requests with runtime args. | def make_cloud_mlengine_request_fn(credentials, model_name, version):
"""Wraps function to make CloudML Engine requests with runtime args."""
def _make_cloud_mlengine_request(examples):
"""Builds and sends requests to Cloud ML Engine."""
api = discovery.build("ml", "v1", credentials=credentials)
parent... |
Encodes inputs makes request to deployed TF model and decodes outputs. | def predict(inputs_list, problem, request_fn):
"""Encodes inputs, makes request to deployed TF model, and decodes outputs."""
assert isinstance(inputs_list, list)
fname = "inputs" if problem.has_inputs else "targets"
input_encoder = problem.feature_info[fname].encoder
input_ids_list = [
_encode(inputs, ... |
Basic 2 - frame recurrent model with stochastic tower. | def next_frame_basic_recurrent():
"""Basic 2-frame recurrent model with stochastic tower."""
hparams = basic_stochastic.next_frame_basic_stochastic_discrete()
hparams.filter_double_steps = 2
hparams.hidden_size = 64
hparams.video_num_input_frames = 4
hparams.video_num_target_frames = 4
hparams.concat_inte... |
Creates experiment function. | def create_teacher_experiment(run_config, hparams, argv):
"""Creates experiment function."""
tf.logging.info("training teacher")
tf.logging.set_verbosity(tf.logging.INFO)
trainer_lib.set_random_seed(FLAGS.random_seed)
usr_dir.import_usr_dir(FLAGS.t2t_usr_dir)
t2t_trainer.maybe_log_registry_and_exit()
if ... |
Generate source and target data from a single file. | def tabbed_parsing_token_generator(data_dir, tmp_dir, train, prefix,
source_vocab_size, target_vocab_size):
"""Generate source and target data from a single file."""
filename = "parsing_{0}.pairs".format("train" if train else "dev")
source_vocab = generator_utils.get_or_generate... |
Generate source and target data from a single file. | def tabbed_parsing_character_generator(tmp_dir, train):
"""Generate source and target data from a single file."""
character_vocab = text_encoder.ByteTextEncoder()
filename = "parsing_{0}.pairs".format("train" if train else "dev")
pair_filepath = os.path.join(tmp_dir, filename)
return text_problems.text2text_g... |
Helper: make predictions and targets lists check they match on length. | def _make_list(predictions, targets):
"""Helper: make predictions and targets lists, check they match on length."""
# Our models sometimes return predictions in lists, make it a list always.
# TODO(lukaszkaiser): make abstractions for nested structures and refactor.
if not isinstance(predictions, (list, tuple)... |
Mean of the inputs but counting only those where targets ! = mask_id. | def masked_mean(inputs, targets, mask_id=None):
"""Mean of the inputs but counting only those where targets != mask_id."""
inputs = [x.astype(np.float32) for x in inputs]
# We assume all elements in the list contribute equally.
# TODO(lukaszkaiser): remove this assumption (e.g., when masks differ).
length = l... |
Calculate accuracy. | def accuracy(batch, model_predictions):
"""Calculate accuracy."""
_, targets = batch
model_predictions, targets = _make_list(model_predictions, targets)
correct = []
for (prediction, target) in zip(model_predictions, targets):
predicted_class = np.argmax(prediction, axis=-1)
correct.append(np.equal(pr... |
Calculate negative log perplexity. | def neg_log_perplexity(batch, model_predictions):
"""Calculate negative log perplexity."""
_, targets = batch
model_predictions, targets = _make_list(model_predictions, targets)
xent = []
for (prediction, target) in zip(model_predictions, targets):
hot_target = layers.one_hot(target, prediction.shape[-1])... |
Calculate loss. | def loss(params, batch, model_predict, rng):
"""Calculate loss."""
inputs, targets = batch
predictions = model_predict(inputs, params, rng=rng)
predictions, targets = _make_list(predictions, targets)
xent = []
for (pred, target) in zip(predictions, targets):
xent.append(np.sum(pred * layers.one_hot(targ... |
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