def _build_policy_initial(self):
""" Builds the policy model (initial step) """
from diplomacy_research.utils.tensorflow import tf
from diplomacy_research.models.layers.initializers import uniform
from diplomacy_research.utils.tensorflow import build_sparse_batched_tensor, pad_axis, to_float, to_bool
if not self.placeholders:
self.placeholders = self.get_placeholders()
# Quick function to retrieve hparams and placeholders and function shorthands
hps = lambda hparam_name: self.hparams[hparam_name]
pholder = lambda placeholder_name: self.placeholders[placeholder_name]
# Training loop
with tf.variable_scope('policy', reuse=tf.AUTO_REUSE):
with tf.device(self.cluster_config.worker_device if self.cluster_config else None):
# Features
board_state = to_float(self.features['board_state']) # tf.flt32 - (b, NB_NODES, NB_FEATURES)
board_alignments = to_float(self.features['board_alignments']) # (b, NB_NODES * len)
decoder_inputs = self.features['decoder_inputs'] # tf.int32 - (b, <= 1 + TOK/ORD * NB_SCS)
decoder_lengths = self.features['decoder_lengths'] # tf.int32 - (b,)
current_power = self.features['current_power'] # tf.int32 - (b,)
current_season = self.features['current_season'] # tf.int32 - (b,)
dropout_rates = self.features['dropout_rate'] # tf.flt32 - (b,)
# Batch size
batch_size = tf.shape(board_state)[0]
# Reshaping board alignments
board_alignments = tf.reshape(board_alignments, [batch_size, -1, NB_NODES])
board_alignments /= tf.math.maximum(1., tf.reduce_sum(board_alignments, axis=-1, keepdims=True))
# Building decoder mask
decoder_mask_indices = self.features['decoder_mask_indices'] # tf.int64 - (b, 3 * len)
decoder_mask_shape = self.proto_fields['decoder_mask'].shape
# Overriding dropout_rates if pholder('dropout_rate') > 0
dropout_rates = tf.cond(tf.greater(pholder('dropout_rate'), 0.),
true_fn=lambda: tf.zeros_like(dropout_rates) + pholder('dropout_rate'),
false_fn=lambda: dropout_rates)
# Padding inputs
board_alignments = pad_axis(board_alignments, axis=1, min_size=tf.reduce_max(decoder_lengths))
decoder_inputs = pad_axis(decoder_inputs, axis=-1, min_size=2)
decoder_mask_indices = pad_axis(decoder_mask_indices, axis=-1, min_size=len(decoder_mask_shape))
# Reshaping to (b, len, 3)
# decoder_mask is -- tf.bool (batch, TOK/ORD * NB_SC, VOCAB_SIZE, VOCAB_SIZE)
decoder_mask_indices = tf.reshape(decoder_mask_indices, [batch_size, -1, len(decoder_mask_shape)])
decoder_mask = build_sparse_batched_tensor(decoder_mask_indices,
value=True,
dtype=tf.bool,
dense_shape=decoder_mask_shape)
# Making sure all RNN lengths are at least 1
# No need to trim, because the fields are variable length
raw_decoder_lengths = decoder_lengths
decoder_lengths = tf.math.maximum(1, decoder_lengths)
# Placeholders
decoder_type = tf.reduce_max(pholder('decoder_type'))
is_training = pholder('is_training')
# Computing FiLM Gammas and Betas
with tf.variable_scope('film_scope'):
power_embedding = uniform(name='power_embedding',
shape=[NB_POWERS, hps('power_emb_size')],
scale=1.)
current_power_mask = tf.one_hot(current_power, NB_POWERS, dtype=tf.float32)
current_power_embedding = tf.reduce_sum(power_embedding[None]
* current_power_mask[:, :, None], axis=1) # (b, power_emb)
film_embedding_input = current_power_embedding
# Also conditioning on current_season
season_embedding = uniform(name='season_embedding',
shape=[NB_SEASONS, hps('season_emb_size')],
scale=1.)
current_season_mask = tf.one_hot(current_season, NB_SEASONS, dtype=tf.float32)
current_season_embedding = tf.reduce_sum(season_embedding[None] # (b,season_emb)
* current_season_mask[:, :, None], axis=1)
film_embedding_input = tf.concat([film_embedding_input, current_season_embedding], axis=1)
film_output_dims = [hps('gcn_size')] * (hps('nb_graph_conv') - 1) + [hps('attn_size')]
film_weights = tf.layers.Dense(units=2 * sum(film_output_dims), # (b, 1, 750)
use_bias=True,
activation=None)(film_embedding_input)[:, None, :]
film_gammas, film_betas = tf.split(film_weights, 2, axis=2) # (b, 1, 750)
film_gammas = tf.split(film_gammas, film_output_dims, axis=2)
film_betas = tf.split(film_betas, film_output_dims, axis=2)
# Storing as temporary output
self.add_output('_board_state_conv_film_gammas', film_gammas)
self.add_output('_board_state_conv_film_betas', film_betas)
# Creating graph convolution
with tf.variable_scope('graph_conv_scope'):
assert hps('nb_graph_conv') >= 2
# Encoding board state
board_state_0yr_conv = self.encode_board(board_state, name='board_state_conv')
board_state_conv = self.get_board_state_conv(board_state_0yr_conv, is_training)
# Creating word embedding vector (to embed word_ix)
# Embeddings needs to be cached locally on the worker, otherwise TF can't compute their gradients
with tf.variable_scope('word_embedding_scope'):
# embedding: (voc_size, 256)
caching_device = self.cluster_config.caching_device if self.cluster_config else None
word_embedding = uniform(name='word_embedding',
shape=[VOCABULARY_SIZE, hps('word_emb_size')],
scale=1.,
caching_device=caching_device)
# Building output tags
outputs = {'batch_size': batch_size,
'board_alignments': board_alignments,
'decoder_inputs': decoder_inputs,
'decoder_mask': decoder_mask,
'decoder_type': decoder_type,
'raw_decoder_lengths': raw_decoder_lengths,
'decoder_lengths': decoder_lengths,
'board_state_conv': board_state_conv,
'board_state_0yr_conv': board_state_0yr_conv,
'word_embedding': word_embedding,
'in_retreat_phase': tf.math.logical_and( # 1) board not empty, 2) disl. units present
tf.reduce_sum(board_state[:], axis=[1, 2]) > 0,
tf.math.logical_not(to_bool(tf.reduce_min(board_state[:, :, 23], -1))))}
# Adding to graph
self.add_meta_information(outputs)
def _build_policy_initial(self):
""" Builds the policy model (initial step) """
from diplomacy_research.utils.tensorflow import tf
from diplomacy_research.models.layers.initializers import uniform
from diplomacy_research.utils.tensorflow import pad_axis, to_int32, to_float, to_bool
if not self.placeholders:
self.placeholders = self.get_placeholders()
# Quick function to retrieve hparams and placeholders and function shorthands
hps = lambda hparam_name: self.hparams[hparam_name]
pholder = lambda placeholder_name: self.placeholders[placeholder_name]
# Training loop
with tf.variable_scope('policy', reuse=tf.AUTO_REUSE):
with tf.device(self.cluster_config.worker_device if self.
cluster_config else None):
# Features
board_state = to_float(
self.features['board_state']
) # tf.flt32 - (b, NB_NODES, NB_FEATURES)
board_alignments = to_float(
self.features['board_alignments']) # (b, NB_NODES * len)
prev_orders_state = to_float(
self.features['prev_orders_state']
) # (b, NB_PRV_OD, NB_ND, NB_OD_FT)
decoder_inputs = self.features[
'decoder_inputs'] # tf.int32 - (b, <= 1 + NB_SCS)
decoder_lengths = self.features[
'decoder_lengths'] # tf.int32 - (b,)
candidates = self.features[
'candidates'] # tf.int32 - (b, nb_locs * MAX_CANDIDATES)
current_power = self.features[
'current_power'] # tf.int32 - (b,)
current_season = self.features[
'current_season'] # tf.int32 - (b,)
dropout_rates = self.features[
'dropout_rate'] # tf.flt32 - (b,)
# Batch size
batch_size = tf.shape(board_state)[0]
# Reshaping board alignments
board_alignments = tf.reshape(board_alignments,
[batch_size, -1, NB_NODES])
board_alignments /= tf.math.maximum(
1., tf.reduce_sum(board_alignments, axis=-1,
keepdims=True))
# Overriding dropout_rates if pholder('dropout_rate') > 0
dropout_rates = tf.cond(
tf.greater(pholder('dropout_rate'), 0.),
true_fn=lambda: tf.zeros_like(dropout_rates) + pholder(
'dropout_rate'),
false_fn=lambda: dropout_rates)
# Padding decoder_inputs and candidates
board_alignments = pad_axis(
board_alignments,
axis=1,
min_size=tf.reduce_max(decoder_lengths))
decoder_inputs = pad_axis(decoder_inputs, axis=-1, min_size=2)
candidates = pad_axis(candidates,
axis=-1,
min_size=MAX_CANDIDATES)
# Making sure all RNN lengths are at least 1
# No need to trim, because the fields are variable length
raw_decoder_lengths = decoder_lengths
decoder_lengths = tf.math.maximum(1, decoder_lengths)
# Placeholders
decoder_type = tf.reduce_max(pholder('decoder_type'))
is_training = pholder('is_training')
# Reshaping candidates
candidates = tf.reshape(candidates,
[batch_size, -1, MAX_CANDIDATES])
candidates = candidates[:, :tf.reduce_max(
decoder_lengths), :] # tf.int32 - (b, nb_locs, MAX_CAN)
# Computing FiLM Gammas and Betas
with tf.variable_scope('film_scope'):
power_embedding = uniform(
name='power_embedding',
shape=[NB_POWERS, hps('power_emb_size')],
scale=1.)
current_power_mask = tf.one_hot(current_power,
NB_POWERS,
dtype=tf.float32)
current_power_embedding = tf.reduce_sum(
power_embedding[None] * current_power_mask[:, :, None],
axis=1) # (b, power_emb)
film_embedding_input = current_power_embedding
# Also conditioning on current_season
season_embedding = uniform(
name='season_embedding',
shape=[NB_SEASONS, hps('season_emb_size')],
scale=1.)
current_season_mask = tf.one_hot(current_season,
NB_SEASONS,
dtype=tf.float32)
current_season_embedding = tf.reduce_sum(
season_embedding[None] # (b,season_emb)
* current_season_mask[:, :, None],
axis=1)
film_embedding_input = tf.concat(
[film_embedding_input, current_season_embedding],
axis=1)
film_output_dims = [hps('gcn_size')] * (
hps('nb_graph_conv') - 1) + [hps('attn_size') // 2]
# For board_state
board_film_weights = tf.layers.Dense(
units=2 * sum(film_output_dims), # (b, 1, 750)
use_bias=True,
activation=None)(film_embedding_input)[:, None, :]
board_film_gammas, board_film_betas = tf.split(
board_film_weights, 2, axis=2) # (b, 1, 750)
board_film_gammas = tf.split(board_film_gammas,
film_output_dims,
axis=2)
board_film_betas = tf.split(board_film_betas,
film_output_dims,
axis=2)
# For prev_orders
prev_ord_film_weights = tf.layers.Dense(
units=2 * sum(film_output_dims), # (b, 1, 750)
use_bias=True,
activation=None)(film_embedding_input)[:, None, :]
prev_ord_film_weights = tf.tile(
prev_ord_film_weights,
[NB_PREV_ORDERS, 1, 1]) # (n_pr, 1, 750)
prev_ord_film_gammas, prev_ord_film_betas = tf.split(
prev_ord_film_weights, 2, axis=2)
prev_ord_film_gammas = tf.split(prev_ord_film_gammas,
film_output_dims,
axis=2)
prev_ord_film_betas = tf.split(prev_ord_film_betas,
film_output_dims,
axis=2)
# Storing as temporary output
self.add_output('_board_state_conv_film_gammas',
board_film_gammas)
self.add_output('_board_state_conv_film_betas',
board_film_betas)
self.add_output('_prev_orders_conv_film_gammas',
prev_ord_film_gammas)
self.add_output('_prev_orders_conv_film_betas',
prev_ord_film_betas)
# Creating graph convolution
with tf.variable_scope('graph_conv_scope'):
assert hps('nb_graph_conv') >= 2
assert hps('attn_size') % 2 == 0
# Encoding board state
board_state_0yr_conv = self.encode_board(
board_state, name='board_state_conv')
# Encoding prev_orders
prev_orders_state = tf.reshape(prev_orders_state, [
batch_size * NB_PREV_ORDERS, NB_NODES,
NB_ORDERS_FEATURES
])
prev_ord_conv = self.encode_board(prev_orders_state,
name='prev_orders_conv')
# Splitting back into (b, nb_prev, NB_NODES, attn_size // 2)
# Reducing the prev ord conv using avg
prev_ord_conv = tf.reshape(prev_ord_conv, [
batch_size, NB_PREV_ORDERS, NB_NODES,
hps('attn_size') // 2
])
prev_ord_conv = tf.reduce_mean(prev_ord_conv, axis=1)
# Concatenating the current board conv with the prev ord conv
# The final board_state_conv should be of dimension (b, NB_NODE, attn_size)
board_state_conv = self.get_board_state_conv(
board_state_0yr_conv, is_training, prev_ord_conv)
# Creating order embedding vector (to embed order_ix)
# Embeddings needs to be cached locally on the worker, otherwise TF can't compute their gradients
with tf.variable_scope('order_embedding_scope'):
# embedding: (order_vocab_size, 64)
caching_device = self.cluster_config.caching_device if self.cluster_config else None
partitioner = tf.fixed_size_partitioner(
NB_PARTITIONS) if hps('use_partitioner') else None
order_embedding = uniform(
name='order_embedding',
shape=[ORDER_VOCABULARY_SIZE,
hps('order_emb_size')],
scale=1.,
partitioner=partitioner,
caching_device=caching_device)
# Creating candidate embedding
with tf.variable_scope('candidate_embedding_scope'):
# embedding: (order_vocab_size, 64)
caching_device = self.cluster_config.caching_device if self.cluster_config else None
partitioner = tf.fixed_size_partitioner(
NB_PARTITIONS) if hps('use_partitioner') else None
candidate_embedding = uniform(
name='candidate_embedding',
shape=[ORDER_VOCABULARY_SIZE,
hps('lstm_size') + 1],
scale=1.,
partitioner=partitioner,
caching_device=caching_device)
# Trimming to the maximum number of candidates
candidate_lengths = tf.reduce_sum(
to_int32(tf.math.greater(candidates, PAD_ID)),
-1) # int32 - (b,)
max_candidate_length = tf.math.maximum(
1, tf.reduce_max(candidate_lengths))
candidates = candidates[:, :, :max_candidate_length]
# Building output tags
outputs = {
'batch_size':
batch_size,
'board_alignments':
board_alignments,
'decoder_inputs':
decoder_inputs,
'decoder_type':
decoder_type,
'raw_decoder_lengths':
raw_decoder_lengths,
'decoder_lengths':
decoder_lengths,
'board_state_conv':
board_state_conv,
'board_state_0yr_conv':
board_state_0yr_conv,
'prev_ord_conv':
prev_ord_conv,
'order_embedding':
order_embedding,
'candidate_embedding':
candidate_embedding,
'candidates':
candidates,
'max_candidate_length':
max_candidate_length,
'in_retreat_phase':
tf.math.logical_and( # 1) board not empty, 2) disl. units present
tf.reduce_sum(board_state[:], axis=[1, 2]) > 0,
tf.math.logical_not(
to_bool(tf.reduce_min(board_state[:, :, 23], -1))))
}
# Adding to graph
self.add_meta_information(outputs)