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shift_reduce_v1.py
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shift_reduce_v1.py
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import numpy as np
import dynet as dy
import nn
import ops
from dy_utils import ParamManager as pm
from actions import Actions
from vocab import Vocab
# from event_constraints import EventConstraint
import io_utils
class RoleLabeler(object):
def __init__(self, config, encoder_output_dim, action_dict, role_type_dict):
self.config = config
self.model = pm.global_collection()
bi_rnn_dim = encoder_output_dim # config['rnn_dim'] * 2 #+ config['edge_embed_dim']
lmda_dim = config['lmda_rnn_dim']
self.lmda_dim = lmda_dim
self.bi_rnn_dim = bi_rnn_dim
self.role_type_dict = role_type_dict
hidden_input_dim = lmda_dim * 2 + bi_rnn_dim * 2 + config['out_rnn_dim']
# self.role_attn_hidden = nn.Linear(hidden_input_dim, config['role_embed_dim'])
#
# hidden_input_dim = hidden_input_dim + config['role_embed_dim']
self.hidden_arg = nn.Linear(hidden_input_dim+len(role_type_dict), config['output_hidden_dim'],
activation='tanh')
self.output_arg = nn.Linear(config['output_hidden_dim'], len(role_type_dict))
hidden_input_dim_co = lmda_dim * 3 + bi_rnn_dim * 2 + config['out_rnn_dim']
self.hidden_ent_corel = nn.Linear(hidden_input_dim_co, config['output_hidden_dim'],
activation='tanh')
self.output_ent_corel = nn.Linear(config['output_hidden_dim'], 2)
self.position_embed = nn.Embedding(500, 20)
attn_input = self.bi_rnn_dim * 1 + 20 * 2
self.attn_hidden = nn.Linear(attn_input, 80, activation='tanh')
self.attn_out = nn.Linear(80, 1)
self.distrib_attn_hidden = nn.Linear(hidden_input_dim + len(role_type_dict), 80, activation='tanh')
self.distrib_attn_out = nn.Linear(80, 1)
self.empty_embedding = self.model.add_parameters((len(role_type_dict),), name='stackGuardEmb')
def arg_prd_distributions_role_attn(self, inputs, arg_prd_distributions_role):
inputs_ = [inputs for _ in range(len(arg_prd_distributions_role))]
arg_prd_distributions_role = ops.cat(arg_prd_distributions_role, 1)
inputs_ = ops.cat(inputs_, 1)
att_input = dy.concatenate([arg_prd_distributions_role, inputs_], 0)
hidden = self.distrib_attn_hidden(att_input)
attn_out = self.distrib_attn_out(hidden)
attn_prob = nn.softmax(attn_out, dim=1)
rep = arg_prd_distributions_role * dy.transpose(attn_prob)
return rep
def opinion_aspect_role_attn(self, inputs, role_table=None):
role_list = []
for k, v in self.role_type_dict.__iter__():
role_list.append(k)
role_emb = ops.cat(role_table(role_list), 1)
hidden = self.role_attn_hidden(inputs)
# attn = nn.dot_transpose(hidden, role_emb)
attn = dy.transpose(hidden) * role_emb
attn_output = role_emb * dy.transpose(attn)
# attn_output = nn.dot_transpose(attn, role_emb)
return attn_output
def forward(self, beta_embed, lmda_embed, sigma_embed, alpha_embed, out_embed, gold_role_label, role_table=None,
history_info=None):
# attn_rep = self.position_aware_attn(hidden_mat, last_h, prd_idx, prd_idx, arg_idx, arg_idx, seq_len)
state_embed = ops.cat([beta_embed, lmda_embed, sigma_embed, alpha_embed, out_embed], dim=0)
if history_info is not None:
if len(history_info) > 1:
rep = ops.cat([self.arg_prd_distributions_role_attn(state_embed, history_info), state_embed], 0)
else:
rep = ops.cat([self.empty_embedding, state_embed], 0)
else:
rep = ops.cat([self.empty_embedding, state_embed], 0)
rep = dy.dropout(rep, 0.25)
hidden = self.hidden_arg(rep)
out = self.output_arg(hidden)
loss = dy.pickneglogsoftmax(out, gold_role_label)
return loss
def decode(self, beta_embed, lmda_embed, sigma_embed, alpha_embed, out_embed, role_table=None, history_info=None):
# attn_rep = self.position_aware_attn(hidden_mat, last_h, prd_idx, prd_idx, arg_idx, arg_idx, seq_len)
state_embed = ops.cat([beta_embed, lmda_embed, sigma_embed, alpha_embed, out_embed], dim=0)
# if role_table is not None:
# rep = ops.cat([self.opinion_aspect_role_attn(state_embed, role_table), state_embed, self.empty_embedding], 0)
# rep = ops.cat([self.empty_embedding, state_embed], 0)
# if len(history_info) > 1:
if history_info is not None:
if len(history_info) > 1:
rep = ops.cat([self.arg_prd_distributions_role_attn(state_embed, history_info), state_embed], 0)
else:
rep = ops.cat([self.empty_embedding, state_embed], 0)
else:
rep = ops.cat([self.empty_embedding, state_embed], 0)
hidden = self.hidden_arg(rep)
out = self.output_arg(hidden)
np_score = out.npvalue().flatten()
return np.argmax(np_score)
def position_aware_attn(self, hidden_mat, last_h, start1, ent1, start2, end2, seq_len):
tri_pos_list = []
ent_pos_list = []
for i in range(seq_len):
tri_pos_list.append(io_utils.relative_position(start1, ent1, i))
ent_pos_list.append(io_utils.relative_position(start2, end2, i))
tri_pos_emb = self.position_embed(tri_pos_list)
tri_pos_mat = ops.cat(tri_pos_emb, 1)
ent_pos_emb = self.position_embed(ent_pos_list)
ent_pos_mat = ops.cat(ent_pos_emb, 1)
att_input = ops.cat([hidden_mat, tri_pos_mat, ent_pos_mat], 0)
hidden = self.attn_hidden(att_input)
attn_out = self.attn_out(hidden)
attn_prob = nn.softmax(attn_out, dim=1)
rep = hidden_mat * dy.transpose(attn_prob)
return rep
class ShiftReduce(object):
def __init__(self, config, encoder_output_dim, action_dict, role_type_dict):
self.config = config
self.model = pm.global_collection()
self.role_labeler = RoleLabeler(config, encoder_output_dim, action_dict, role_type_dict)
self.role_null_id = role_type_dict[Vocab.NULL]
self.role_type_dict = role_type_dict
bi_rnn_dim = encoder_output_dim # config['rnn_dim'] * 2 #+ config['edge_embed_dim']
lmda_dim = config['lmda_rnn_dim']
self.lmda_dim = lmda_dim
self.bi_rnn_dim = bi_rnn_dim
dp_state = config['dp_state']
dp_state_h = config['dp_state_h']
# ------ states
self.gamma_var = nn.LambdaVar(lmda_dim)
self.sigma_a_rnn = nn.StackLSTM(lmda_dim, lmda_dim, dp_state, dp_state_h)
self.alpha_a_rnn = nn.StackLSTM(lmda_dim, lmda_dim, dp_state, dp_state_h)
self.sigma_p_rnn = nn.StackLSTM(lmda_dim, lmda_dim, dp_state, dp_state_h)
self.alpha_p_rnn = nn.StackLSTM(lmda_dim, lmda_dim, dp_state, dp_state_h)
self.term_rnn = nn.StackLSTM(lmda_dim, lmda_dim, dp_state, dp_state_h)
self.actions_rnn = nn.StackLSTM(config['action_embed_dim'], config['action_rnn_dim'], dp_state, dp_state_h)
self.out_rnn = nn.StackLSTM(bi_rnn_dim, config['out_rnn_dim'], dp_state, dp_state_h)
# ------ states
self.act_table = nn.Embedding(len(action_dict), config['action_embed_dim'])
self.role_table = nn.Embedding(len(role_type_dict), config['role_embed_dim'])
self.act = Actions(action_dict, role_type_dict)
hidden_input_dim = bi_rnn_dim + lmda_dim * 6 \
+ config['action_rnn_dim'] + config['out_rnn_dim']
self.hidden_linear = nn.Linear(hidden_input_dim, config['output_hidden_dim'], activation='tanh')
self.output_linear = nn.ActionGenerator(config['output_hidden_dim'], len(action_dict))
prd_embed_dim = config['prd_embed_dim']
prd_to_lmda_dim = bi_rnn_dim + prd_embed_dim # + config['sent_vec_dim']
self.prd_to_lmda = nn.Linear(prd_to_lmda_dim, lmda_dim, activation='tanh')
self.arg_op_distrib_as = nn.Linear(lmda_dim * 2 + config['role_embed_dim'], len(role_type_dict), activation='softmax')
self.arg_as_distrib_op = nn.Linear(lmda_dim * 2 + config['role_embed_dim'], len(role_type_dict), activation='softmax')
# beta
self.empty_buffer_emb = self.model.add_parameters((bi_rnn_dim,), name='bufferGuardEmb')
def __call__(self, toks, hidden_state_list, last_h, oracle_actions=None,
oracle_action_strs=None, is_train=True, prds=None, roles=None):
def get_role_label(sigma_last_idx, lmda_idx):
for i in roles:
if (i[0] == sigma_last_idx and i[1] == lmda_idx) or (i[1] == sigma_last_idx and i[0] == lmda_idx):
return i[2]
return self.role_null_id
# raise RuntimeError('Unknown aspect term & opinion term idx: ' + str(sigma_last_idx) + ' ' + str(lmda_idx))
def get_history(aspect_idx, opinion_idx, history):
res = []
e = dy.random_normal(len(self.role_type_dict), mean=0, stddev=1.0, batch_size=1)
if len(history) == 0:
res.append(e)
else:
for a, p, feat in history:
if aspect_idx == a or opinion_idx == p:
res.append(feat)
if len(res) == 0:
res.append(e)
return res
frames = []
aspect_terms = []
opinion_terms = []
hidden_mat = ops.cat(hidden_state_list, 1)
seq_len = len(toks)
# beta, queue, for candidate sentence.
buffer = nn.Buffer(self.bi_rnn_dim, hidden_state_list)
losses = []
loss_roles = []
pred_action_strs = []
# storage the triplet feature
history_tri_feat = []
self.sigma_a_rnn.init_sequence(not is_train)
self.alpha_a_rnn.init_sequence(not is_train)
self.sigma_p_rnn.init_sequence(not is_train)
self.alpha_p_rnn.init_sequence(not is_train)
self.term_rnn.init_sequence(not is_train)
self.actions_rnn.init_sequence(not is_train)
self.out_rnn.init_sequence(not is_train)
steps = 0
# while not (buffer.is_empty() and self.gamma_var.is_empty() and self.term_rnn.is_empty()) and steps < len(oracle_actions):
while True:
if steps >= len(oracle_actions):
break
if buffer.idx >= seq_len:
break
if buffer.is_empty() and self.gamma_var.is_empty():
break
# 上一个action
pre_action = None if self.actions_rnn.is_empty() else self.actions_rnn.last_idx()
# based on parser state, get valid actions.
# only a very small subset of actions are valid, as below.
valid_actions = []
# if sigma_rnn_empty_flag == 1:
# valid_actions += [self.act.shift_id]
if buffer.is_empty() and self.gamma_var.is_empty():
valid_actions += [self.act.term_gen_a_id, self.act.term_gen_o_id]
elif pre_action is not None and self.act.is_delete(pre_action):
valid_actions += [self.act.delete_id, self.act.term_shift_a_id, self.act.term_shift_o_id]
elif pre_action is not None and self.act.is_shift(pre_action):
valid_actions += [self.act.delete_id, self.act.term_shift_o_id, self.act.term_shift_a_id]
elif pre_action is not None and self.act.is_arc(pre_action):
valid_actions += [self.act.arc_id, self.act.no_arc_id, self.act.shift_id]
elif pre_action is not None and self.act.is_no_arc(pre_action):
valid_actions += [self.act.arc_id, self.act.no_arc_id, self.act.shift_id]
elif pre_action is not None and self.act.is_term_shift_o(pre_action):
valid_actions += [self.act.term_shift_o_id, self.act.term_gen_o_id]
elif pre_action is not None and self.act.is_term_gen_o(pre_action):
valid_actions += [self.act.term_back_id, self.act.arc_id]
elif pre_action is not None and self.act.is_term_shift_a(pre_action):
valid_actions += [self.act.term_shift_a_id, self.act.term_gen_a_id]
elif pre_action is not None and self.act.is_term_gen_a(pre_action):
valid_actions += [self.act.term_back_id, self.act.arc_id, self.act.no_arc_id]
elif pre_action is not None and self.act.is_term_back(pre_action): # term_back
valid_actions += [self.act.shift_id, self.act.arc_id, self.act.no_arc_id]
elif self.sigma_a_rnn.is_empty() and (not self.alpha_a_rnn.is_empty() or not self.gamma_var.is_empty()):
valid_actions += [self.act.shift_id]
elif self.sigma_p_rnn.is_empty() and (not self.alpha_p_rnn.is_empty() or not self.gamma_var.is_empty()):
valid_actions += [self.act.shift_id]
else:
valid_actions += [self.act.delete_id, self.act.term_shift_o_id, self.act.term_shift_a_id,
self.act.no_arc_id, self.act.term_back_id, self.act.arc_id]
# predicting action
beta_embed = self.empty_buffer_emb if buffer.is_empty() else buffer.hidden_embedding()
lmda_embed = self.gamma_var.embedding()
sigma_a_embed = self.sigma_a_rnn.embedding()
alpha_a_embed = self.alpha_a_rnn.embedding()
sigma_p_embed = self.sigma_p_rnn.embedding()
alpha_p_embed = self.alpha_p_rnn.embedding()
term_embed = self.term_rnn.embedding()
action_embed = self.actions_rnn.embedding()
out_embed = self.out_rnn.embedding()
state_embed = ops.cat([beta_embed, lmda_embed, sigma_a_embed, sigma_p_embed, alpha_a_embed, alpha_p_embed,
term_embed, action_embed, out_embed], dim=0)
if is_train:
state_embed = dy.dropout(state_embed, self.config['dp_out'])
hidden_rep = self.hidden_linear(state_embed)
logits = self.output_linear(hidden_rep)
if is_train:
log_probs = dy.log_softmax(logits, valid_actions)
else:
log_probs = dy.log_softmax(logits, valid_actions)
if is_train:
action = oracle_actions[steps]
action_str = oracle_action_strs[steps]
if action not in valid_actions:
raise RuntimeError('Action %s dose not in valid_actions, %s(pre) %s: [%s]' % (
action_str, self.act.to_act_str(pre_action),
self.act.to_act_str(action), ','.join(
[self.act.to_act_str(ac) for ac in valid_actions])))
losses.append(dy.pick(log_probs, action))
else:
np_log_probs = log_probs.npvalue()
act_prob = np.max(np_log_probs)
action = np.argmax(np_log_probs)
action_str = self.act.to_act_str(action)
pred_action_strs.append(action_str)
# if True:continue
# update the parser state according to the action.
if self.act.is_delete(action):
# pop the word wi off buffer
hx, idx = buffer.pop()
self.out_rnn.push(hx, idx)
elif self.act.is_shift(action):
# while no elements are in sigma
while not self.alpha_a_rnn.is_empty():
self.sigma_a_rnn.push(*self.alpha_a_rnn.pop())
while not self.alpha_p_rnn.is_empty():
self.sigma_p_rnn.push(*self.alpha_p_rnn.pop())
while not self.gamma_var.is_empty():
if self.gamma_var.lambda_type == 'opinion':
hx, idx = self.gamma_var.pop()
self.sigma_p_rnn.push(hx, idx)
elif self.gamma_var.lambda_type == 'aspect':
hx, idx = self.gamma_var.pop()
self.sigma_a_rnn.push(hx, idx)
else:
raise RuntimeError('Wrong lambda type, not aspect or opinion')
elif self.act.is_term_shift_o(action) or self.act.is_term_shift_a(action):
# move the top word wi from buffer to term
if not buffer.is_empty():
hx, idx = buffer.pop()
self.term_rnn.push(hx, idx)
elif self.act.is_term_gen_o(action):
# summarize all elements in term_rnn to an opinion vector representation and copy it to gamma_var
vec = []
opinion_idx = []
start_idx = 0
for i in self.term_rnn.iter():
start_idx = i[1]
vec.append(i[0])
opinion_idx.append(i[1])
# need summarize operation for vec
vec = ops.sum(vec)
self.gamma_var.push(vec, opinion_idx, nn.LambdaVar.OPINION)
opinion_terms.append(opinion_idx)
elif self.act.is_term_gen_a(action):
# summarize all elements in term_rnn to an aspect vector representation and copy it to gamma_var
vec = []
aspect_idx = []
for i in self.term_rnn.iter():
vec.append(i[0])
aspect_idx.append(i[1])
# need summarize operation for vec
vec = ops.sum(vec)
self.gamma_var.push(vec, aspect_idx, nn.LambdaVar.ASPECT)
aspect_terms.append(aspect_idx)
elif self.act.is_arc(action):
lmda_idx = self.gamma_var.idx
lmda_embed = self.gamma_var.embedding()
lmda_type = self.gamma_var.lambda_type
if lmda_type == 'opinion':
if not self.sigma_a_rnn.is_empty():
sigma_last_embed, sigma_last_idx = self.sigma_a_rnn.pop()
# according to the current aspect and opinion to
# obtain historical information that has been predicted
history = get_history(sigma_last_idx, lmda_idx, history_tri_feat)
if is_train:
role_label = get_role_label(sigma_last_idx, lmda_idx)
loss_role = self.role_labeler.forward(beta_embed, lmda_embed, sigma_last_embed,
alpha_a_embed, out_embed, role_label,
role_table=self.role_table, history_info=history)
loss_roles.append(loss_role)
else:
role_label = self.role_labeler.decode(beta_embed, lmda_embed, sigma_last_embed,
alpha_a_embed, out_embed,
role_table=self.role_table, history_info=history)
polarity_emb = self.role_table[role_label]
tri_feature = self.arg_as_distrib_op(ops.cat([sigma_last_embed, lmda_embed, polarity_emb], dim=0))
history_tri_feat.append((sigma_last_idx, lmda_idx, tri_feature))
self.alpha_a_rnn.push(sigma_last_embed, sigma_last_idx)
frame = (sigma_last_idx, lmda_idx, role_label)
frames.append(frame)
sigma_rnn_empty_flag = 0
else:
sigma_rnn_empty_flag = 1
elif lmda_type == 'aspect':
if not self.sigma_p_rnn.is_empty():
sigma_last_embed, sigma_last_idx = self.sigma_p_rnn.pop()
history = get_history(lmda_idx, sigma_last_idx, history_tri_feat)
if is_train:
role_label = get_role_label(sigma_last_idx, lmda_idx)
loss_role = self.role_labeler.forward(beta_embed, lmda_embed, sigma_last_embed,
alpha_p_embed, out_embed, role_label,
role_table=self.role_table, history_info=history)
loss_roles.append(loss_role)
else:
role_label = self.role_labeler.decode(beta_embed, lmda_embed, sigma_last_embed,
alpha_p_embed, out_embed,
role_table=self.role_table, history_info=history)
polarity_emb = self.role_table[role_label]
tri_feature = self.arg_op_distrib_as(ops.cat([sigma_last_embed, lmda_embed, polarity_emb], dim=0))
history_tri_feat.append((lmda_idx, sigma_last_idx, tri_feature))
self.alpha_p_rnn.push(sigma_last_embed, sigma_last_idx)
frame = (lmda_idx, sigma_last_idx, role_label)
frames.append(frame)
sigma_rnn_empty_flag = 0
else:
sigma_rnn_empty_flag = 1
else:
raise RuntimeError('Wrong lambda type, not aspect or opinion')
elif self.act.is_no_arc(action):
# alpha holding elements temporarily popped out of sigma
lmda_type = self.gamma_var.lambda_type
if lmda_type == 'opinion':
if not self.sigma_a_rnn.is_empty():
self.alpha_a_rnn.push(*self.sigma_a_rnn.pop())
sigma_rnn_empty_flag = 0
else:
sigma_rnn_empty_flag = 1
elif lmda_type == 'aspect':
if not self.sigma_p_rnn.is_empty():
self.alpha_p_rnn.push(*self.sigma_p_rnn.pop())
sigma_rnn_empty_flag = 0
else:
sigma_rnn_empty_flag = 1
else:
raise RuntimeError('Wrong lambda type, not aspect or opinion')
elif self.act.is_term_back(action):
start_idx = 0
while not self.term_rnn.is_empty():
_, start_idx = self.term_rnn.pop()
# the elements in buffer don't pop operation, so there is no need to push operation,
# only need to change the idx
buffer.move_pointer(start_idx + 1)
else:
raise RuntimeError('Unknown action type:' + str(action) + self.act.to_act_str(action))
self.actions_rnn.push(self.act_table[action], action)
steps += 1
self.clear()
return losses, loss_roles, frames, aspect_terms, opinion_terms, pred_action_strs
def clear(self):
self.sigma_a_rnn.clear()
self.sigma_p_rnn.clear()
self.alpha_a_rnn.clear()
self.alpha_p_rnn.clear()
self.term_rnn.clear()
self.actions_rnn.clear()
self.gamma_var.clear()
self.out_rnn.clear()
def same(self, args):
same_event_ents = set()
for arg1 in args:
ent_start1, ent_end1, tri_idx1, _ = arg1
for arg2 in args:
ent_start2, ent_end2, tri_idx2, _ = arg2
if tri_idx1 == tri_idx2:
same_event_ents.add((ent_start1, ent_start2))
same_event_ents.add((ent_start2, ent_start1))
return same_event_ents
def get_valid_args(self, ent_type_id, tri_type_id):
return self.cached_valid_args[(ent_type_id, tri_type_id)]