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EncoderDecoderModelAttention.py
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EncoderDecoderModelAttention.py
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#'!/usr/bin/env python
#-*- coding:utf-8 -*-
#!/usr/bin/python3
import sys
import os
sys.path.append(os.path.join(os.path.dirname(__file__), "../"))
from chainer import Chain, Variable, cuda, functions, links, optimizer, optimizers, serializers
from chainer import link
import util.generators as gens
from util.functions import trace, fill_batch
from util.vocabulary import Vocabulary
from Attention.attention_dialogue import AttentionDialogue
import random
from util.XP import XP
from os import path
APP_ROOT = path.dirname(path.abspath(__file__))
class EncoderDecoderModelAttention:
def __init__(self, parameter_dict):
"""
Initial Paramater Setting
:param parameter_dict: setting the a varity of paramater
If you use gpu, you setting the bellow paramater
XP.set_library(True, {your gpu id})
"""
self.parameter_dict = parameter_dict
self.source = parameter_dict["source"]
self.target = parameter_dict["target"]
self.test_source = parameter_dict["test_source"]
self.test_target = parameter_dict["test_target"]
self.vocab = parameter_dict["vocab"]
self.embed = parameter_dict["embed"]
self.hidden = parameter_dict["hidden"]
self.epoch = parameter_dict["epoch"]
self.minibatch = parameter_dict["minibatch"]
self.generation_limit = parameter_dict["generation_limit"]
self.word2vec = parameter_dict["word2vec"]
self.word2vecFlag = parameter_dict["word2vecFlag"]
self.model = parameter_dict["model"]
self.attention_dialogue = parameter_dict["attention_dialogue"]
XP.set_library(False, 0)
self.XP = XP
def forward(self, src_batch, trg_batch, src_vocab, trg_vocab, attention, is_training, generation_limit):
pass
def forward_implement(self, src_batch, trg_batch, src_vocab, trg_vocab, attention, is_training, generation_limit):
"""
chainer forward method
:param src_batch(lise): source_sentence
:param trg_batch(lise):
:param src_vocab:
:param trg_vocab:
:param attention:
:param is_training(boolean): setting the traing flag
:param generation_limit(int): useing method for predict
:return:
"""
batch_size = len(src_batch)
src_len = len(src_batch[0])
trg_len = len(trg_batch[0]) if trg_batch else 0
src_stoi = src_vocab.stoi
trg_stoi = trg_vocab.stoi
trg_itos = trg_vocab.itos
attention.reset()
x = self.XP.iarray([src_stoi('</s>') for _ in range(batch_size)])
attention.embed(x)
for l in reversed(range(src_len)):
x = self.XP.iarray([src_stoi(src_batch[k][l]) for k in range(batch_size)])
attention.embed(x)
attention.encode()
t = self.XP.iarray([trg_stoi('<s>') for _ in range(batch_size)])
hyp_batch = [[] for _ in range(batch_size)]
if is_training:
loss = self.XP.fzeros(())
for l in range(trg_len):
y = attention.decode(t)
t = self.XP.iarray([trg_stoi(trg_batch[k][l]) for k in range(batch_size)])
loss += functions.softmax_cross_entropy(y, t)
output = cuda.to_cpu(y.data.argmax(1))
for k in range(batch_size):
hyp_batch[k].append(trg_itos(output[k]))
return hyp_batch, loss
else:
while len(hyp_batch[0]) < generation_limit:
y = attention.decode(t)
output = cuda.to_cpu(y.data.argmax(1))
t = self.XP.iarray(output)
for k in range(batch_size):
hyp_batch[k].append(trg_itos(output[k]))
if all(hyp_batch[k][-1] == '</s>' for k in range(batch_size)):
break
return hyp_batch
def train(self):
"""
Train method
If you use the word2vec model, you possible to use the copy weight
Optimizer method use the Adagrad
"""
trace('making vocabularies ...')
src_vocab = Vocabulary.new(gens.word_list(self.source), self.vocab)
trg_vocab = Vocabulary.new(gens.word_list(self.target), self.vocab)
trace('making model ...')
self.attention_dialogue = AttentionDialogue(self.vocab, self.embed, self.hidden, self.XP)
if self.word2vecFlag:
self.copy_model(self.word2vec, self.attention_dialogue.emb)
self.copy_model(self.word2vec, self.attention_dialogue.dec, dec_flag=True)
for epoch in range(self.epoch):
trace('epoch %d/%d: ' % (epoch + 1, self.epoch))
trained = 0
gen1 = gens.word_list(self.source)
gen2 = gens.word_list(self.target)
gen3 = gens.batch(gens.sorted_parallel(gen1, gen2, 100 * self.minibatch), self.minibatch)
opt = optimizers.AdaGrad(lr = 0.01)
opt.setup(self.attention_dialogue)
opt.add_hook(optimizer.GradientClipping(5))
random_number = random.randint(0, self.minibatch - 1)
for src_batch, trg_batch in gen3:
src_batch = fill_batch(src_batch)
trg_batch = fill_batch(trg_batch)
K = len(src_batch)
hyp_batch, loss = self.forward_implement(src_batch, trg_batch, src_vocab, trg_vocab, self.attention_dialogue, True, 0)
loss.backward()
opt.update()
self.print_out(random_number, epoch, trained, src_batch, trg_batch, hyp_batch)
trained += K
trace('saving model ...')
prefix = self.model
model_path = APP_ROOT + "/model/" + prefix
src_vocab.save(model_path + '.srcvocab')
trg_vocab.save(model_path + '.trgvocab')
self.attention_dialogue.save_spec(model_path + '.spec')
serializers.save_hdf5(model_path + '.weights', self.attention_dialogue)
trace('finished.')
def test(self):
"""
Test method
You have to parepare the train model
"""
trace('loading model ...')
prefix = self.model
model_path = APP_ROOT + "/model/" + prefix
src_vocab = Vocabulary.load(model_path + '.srcvocab')
trg_vocab = Vocabulary.load(model_path + '.trgvocab')
self.attention_dialogue = AttentionDialogue.load_spec(model_path + '.spec', self.XP)
serializers.load_hdf5(model_path + '.weights', self.attention_dialogue)
trace('generating translation ...')
generated = 0
with open(self.test_target, 'w') as fp:
for src_batch in gens.batch(gens.word_list(self.source), self.minibatch):
src_batch = fill_batch(src_batch)
K = len(src_batch)
trace('sample %8d - %8d ...' % (generated + 1, generated + K))
hyp_batch = self.forward_implement(src_batch, None, src_vocab, trg_vocab, self.attention_dialogue, False, self.generation_limit)
source_cuont = 0
for hyp in hyp_batch:
hyp.append('</s>')
hyp = hyp[:hyp.index('</s>')]
print("src : " + "".join(src_batch[source_cuont]).replace("</s>", ""))
print('hyp : ' +''.join(hyp))
print(' '.join(hyp), file=fp)
source_cuont = source_cuont + 1
generated += K
trace('finished.')
def print_out(self, K, i_epoch, trained, src_batch, trg_batch, hyp_batch):
"""
Print out
:param K:
:param i_epoch:
:param trained: train times
:param src_batch:
:param trg_batch:
:param hyp_batch:
:return:
"""
if K > len(src_batch) and K > len(trg_batch) and K > len(hyp_batch):
K = len(src_batch) - 1
trace('epoch %3d/%3d, sample %8d' % (i_epoch + 1, self.epoch, trained + K + 1))
trace(' src = ' + ' '.join([x if x != '</s>' else '*' for x in src_batch[K]]))
trace(' trg = ' + ' '.join([x if x != '</s>' else '*' for x in trg_batch[K]]))
trace(' hyp = ' + ' '.join([x if x != '</s>' else '*' for x in hyp_batch[K]]))
def copy_model(self, src, dst, dec_flag=False):
"""
Weight Copyt method
:param src: Word2Vec Model
:param dst: Dialogue Model
:param dec_flag: Decoder flag
:return:
"""
print("start copy")
for child in src.children():
if dec_flag:
if dst["embded_target"] and child.name == "weight_xi" and self.word2vecFlag:
for a, b in zip(child.namedparams(), dst["embded_target"].namedparams()):
b[1].data = a[1].data
print('Copy weight_jy')
if child.name not in dst.__dict__: continue
dst_child = dst[child.name]
if type(child) != type(dst_child): continue
if isinstance(child, link.Chain):
self.copy_model(child, dst_child)
if isinstance(child, link.Link):
match = True
for a, b in zip(child.namedparams(), dst_child.namedparams()):
if a[0] != b[0]:
match = False
break
if a[1].data.shape != b[1].data.shape:
match = False
break
if not match:
print('Ignore %s because of parameter mismatch' % child.name)
continue
for a, b in zip(child.namedparams(), dst_child.namedparams()):
b[1].data = a[1].data
print('Copy %s' % child.name)