# Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserve. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from __future__ import absolute_import from __future__ import division from __future__ import print_function import numpy as np import time import os import random import json import six import paddle import paddle.fluid as fluid import paddle.fluid.core as core import paddle.fluid.framework as framework from paddle.fluid.executor import Executor import sys if sys.version[0] == '2': reload(sys) sys.setdefaultencoding("utf-8") sys.path.append('..') from args import * import rc_model from dataset import BRCDataset import logging import pickle from utils import normalize from utils import compute_bleu_rouge from vocab import Vocab def prepare_batch_input(insts, args): batch_size = len(insts['raw_data']) inst_num = len(insts['passage_num']) if batch_size != inst_num: print("data error %d, %d" % (batch_size, inst_num)) return None new_insts = [] passage_idx = 0 for i in range(batch_size): p_len = 0 p_id = [] p_ids = [] q_ids = [] q_id = [] p_id_r = [] p_ids_r = [] q_ids_r = [] q_id_r = [] for j in range(insts['passage_num'][i]): p_ids.append(insts['passage_token_ids'][passage_idx + j]) p_id = p_id + insts['passage_token_ids'][passage_idx + j] q_ids.append(insts['question_token_ids'][passage_idx + j]) q_id = q_id + insts['question_token_ids'][passage_idx + j] passage_idx += insts['passage_num'][i] p_len = len(p_id) def _get_label(idx, ref_len): ret = [0.0] * ref_len if idx >= 0 and idx < ref_len: ret[idx] = 1.0 return [[x] for x in ret] start_label = _get_label(insts['start_id'][i], p_len) end_label = _get_label(insts['end_id'][i], p_len) new_inst = [q_ids, start_label, end_label, p_ids, q_id] new_insts.append(new_inst) return new_insts def batch_reader(batch_list, args): res = [] for batch in batch_list: res.append(prepare_batch_input(batch, args)) return res def read_multiple(reader, count, clip_last=True): """ Stack data from reader for multi-devices. """ def __impl__(): res = [] for item in reader(): res.append(item) if len(res) == count: yield res res = [] if len(res) == count: yield res elif not clip_last: data = [] for item in res: data += item if len(data) > count: inst_num_per_part = len(data) // count yield [ data[inst_num_per_part * i:inst_num_per_part * (i + 1)] for i in range(count) ] return __impl__ def LodTensor_Array(lod_tensor): lod = lod_tensor.lod() array = np.array(lod_tensor) new_array = [] for i in range(len(lod[0]) - 1): new_array.append(array[lod[0][i]:lod[0][i + 1]]) return new_array def print_para(train_prog, train_exe, logger, args): if args.para_print: param_list = train_prog.block(0).all_parameters() param_name_list = [p.name for p in param_list] num_sum = 0 for p_name in param_name_list: p_array = np.array(train_exe.scope.find_var(p_name).get_tensor()) param_num = np.prod(p_array.shape) num_sum = num_sum + param_num logger.info( "param: {0}, mean={1} max={2} min={3} num={4} {5}".format( p_name, p_array.mean(), p_array.max(), p_array.min(), p_array.shape, param_num)) logger.info("total param num: {0}".format(num_sum)) def find_best_answer_for_passage(start_probs, end_probs, passage_len): """ Finds the best answer with the maximum start_prob * end_prob from a single passage """ if passage_len is None: passage_len = len(start_probs) else: passage_len = min(len(start_probs), passage_len) best_start, best_end, max_prob = -1, -1, 0 for start_idx in range(passage_len): for ans_len in range(args.max_a_len): end_idx = start_idx + ans_len if end_idx >= passage_len: continue prob = start_probs[start_idx] * end_probs[end_idx] if prob > max_prob: best_start = start_idx best_end = end_idx max_prob = prob return (best_start, best_end), max_prob def find_best_answer_for_inst(sample, start_prob, end_prob, inst_lod): """ Finds the best answer for a sample given start_prob and end_prob for each position. This will call find_best_answer_for_passage because there are multiple passages in a sample """ best_p_idx, best_span, best_score = None, None, 0 for p_idx, passage in enumerate(sample['passages']): if p_idx >= args.max_p_num: continue if len(start_prob) != len(end_prob): logger.info('error: {}'.format(sample['question'])) continue passage_start = inst_lod[p_idx] - inst_lod[0] passage_end = inst_lod[p_idx + 1] - inst_lod[0] passage_len = passage_end - passage_start passage_len = min(args.max_p_len, len(passage['passage_tokens'])) answer_span, score = find_best_answer_for_passage( start_prob[passage_start:passage_end], end_prob[passage_start:passage_end], passage_len) if score > best_score: best_score = score best_p_idx = p_idx best_span = answer_span if best_p_idx is None or best_span is None: best_answer = '' else: best_answer = ''.join(sample['passages'][best_p_idx]['passage_tokens'][ best_span[0]:best_span[1] + 1]) return best_answer, best_span def validation(inference_program, avg_cost, s_probs, e_probs, match, feed_order, place, dev_count, vocab, brc_data, logger, args): """ """ parallel_executor = fluid.ParallelExecutor( main_program=inference_program, use_cuda=bool(args.use_gpu), loss_name=avg_cost.name) print_para(inference_program, parallel_executor, logger, args) # Use test set as validation each pass total_loss = 0.0 count = 0 n_batch_cnt = 0 n_batch_loss = 0.0 pred_answers, ref_answers = [], [] val_feed_list = [ inference_program.global_block().var(var_name) for var_name in feed_order ] val_feeder = fluid.DataFeeder(val_feed_list, place) pad_id = vocab.get_id(vocab.pad_token) dev_reader = lambda:brc_data.gen_mini_batches('dev', args.batch_size, pad_id, shuffle=False) dev_reader = read_multiple(dev_reader, dev_count) for batch_id, batch_list in enumerate(dev_reader(), 1): feed_data = batch_reader(batch_list, args) val_fetch_outs = parallel_executor.run( feed=list(val_feeder.feed_parallel(feed_data, dev_count)), fetch_list=[avg_cost.name, s_probs.name, e_probs.name, match.name], return_numpy=False) total_loss += np.array(val_fetch_outs[0]).sum() start_probs_m = LodTensor_Array(val_fetch_outs[1]) end_probs_m = LodTensor_Array(val_fetch_outs[2]) match_lod = val_fetch_outs[3].lod() count += len(np.array(val_fetch_outs[0])) n_batch_cnt += len(np.array(val_fetch_outs[0])) n_batch_loss += np.array(val_fetch_outs[0]).sum() log_every_n_batch = args.log_interval if log_every_n_batch > 0 and batch_id % log_every_n_batch == 0: logger.info('Average dev loss from batch {} to {} is {}'.format( batch_id - log_every_n_batch + 1, batch_id, "%.10f" % ( n_batch_loss / n_batch_cnt))) n_batch_loss = 0.0 n_batch_cnt = 0 for idx, batch in enumerate(batch_list): #one batch batch_size = len(batch['raw_data']) batch_range = match_lod[0][idx * batch_size:(idx + 1) * batch_size + 1] batch_lod = [[batch_range[x], batch_range[x + 1]] for x in range(len(batch_range[:-1]))] start_prob_batch = start_probs_m[idx * batch_size:(idx + 1) * batch_size] end_prob_batch = end_probs_m[idx * batch_size:(idx + 1) * batch_size] for sample, start_prob_inst, end_prob_inst, inst_range in zip( batch['raw_data'], start_prob_batch, end_prob_batch, batch_lod): #one instance inst_lod = match_lod[1][inst_range[0]:inst_range[1] + 1] best_answer, best_span = find_best_answer_for_inst( sample, start_prob_inst, end_prob_inst, inst_lod) pred = { 'question_id': sample['question_id'], 'question_type': sample['question_type'], 'answers': [best_answer], 'entity_answers': [[]], 'yesno_answers': [best_span] } pred_answers.append(pred) if 'answers' in sample: ref = { 'question_id': sample['question_id'], 'question_type': sample['question_type'], 'answers': sample['answers'], 'entity_answers': [[]], 'yesno_answers': [] } ref_answers.append(ref) result_dir = args.result_dir result_prefix = args.result_name if result_dir is not None and result_prefix is not None: if not os.path.exists(args.result_dir): os.makedirs(args.result_dir) result_file = os.path.join(result_dir, result_prefix + 'json') with open(result_file, 'w') as fout: for pred_answer in pred_answers: fout.write(json.dumps(pred_answer, ensure_ascii=False) + '\n') logger.info('Saving {} results to {}'.format(result_prefix, result_file)) ave_loss = 1.0 * total_loss / count # compute the bleu and rouge scores if reference answers is provided if len(ref_answers) > 0: pred_dict, ref_dict = {}, {} for pred, ref in zip(pred_answers, ref_answers): question_id = ref['question_id'] if len(ref['answers']) > 0: pred_dict[question_id] = normalize(pred['answers']) ref_dict[question_id] = normalize(ref['answers']) bleu_rouge = compute_bleu_rouge(pred_dict, ref_dict) else: bleu_rouge = None return ave_loss, bleu_rouge def l2_loss(train_prog): param_list = train_prog.block(0).all_parameters() para_sum = [] for para in param_list: para_mul = fluid.layers.elementwise_mul(x=para, y=para, axis=0) para_sum.append(fluid.layers.reduce_sum(input=para_mul, dim=None)) return fluid.layers.sums(para_sum) * 0.5 def train(logger, args): logger.info('Load data_set and vocab...') with open(os.path.join(args.vocab_dir, 'vocab.data'), 'rb') as fin: if six.PY2: vocab = pickle.load(fin) else: vocab = pickle.load(fin, encoding='bytes') logger.info('vocab size is {} and embed dim is {}'.format(vocab.size( ), vocab.embed_dim)) brc_data = BRCDataset(args.max_p_num, args.max_p_len, args.max_q_len, args.trainset, args.devset) logger.info('Converting text into ids...') brc_data.convert_to_ids(vocab) logger.info('Initialize the model...') if not args.use_gpu: place = fluid.CPUPlace() dev_count = int(os.environ.get('CPU_NUM', multiprocessing.cpu_count())) else: place = fluid.CUDAPlace(0) dev_count = fluid.core.get_cuda_device_count() # build model main_program = fluid.Program() startup_prog = fluid.Program() main_program.random_seed = args.random_seed startup_prog.random_seed = args.random_seed with fluid.program_guard(main_program, startup_prog): with fluid.unique_name.guard(): avg_cost, s_probs, e_probs, match, feed_order = rc_model.rc_model( args.hidden_size, vocab, args) # clone from default main program and use it as the validation program inference_program = main_program.clone(for_test=True) # build optimizer if args.optim == 'sgd': optimizer = fluid.optimizer.SGD( learning_rate=args.learning_rate) elif args.optim == 'adam': optimizer = fluid.optimizer.Adam( learning_rate=args.learning_rate) elif args.optim == 'rprop': optimizer = fluid.optimizer.RMSPropOptimizer( learning_rate=args.learning_rate) else: logger.error('Unsupported optimizer: {}'.format(args.optim)) exit(-1) if args.weight_decay > 0.0: avg_cost_wd = avg_cost + args.weight_decay * l2_loss( main_program) optimizer.minimize(avg_cost_wd) # initialize parameters place = core.CUDAPlace(0) if args.use_gpu else core.CPUPlace() exe = Executor(place) if args.load_dir: logger.info('load from {}'.format(args.load_dir)) fluid.io.load_persistables( exe, args.load_dir, main_program=main_program) else: exe.run(startup_prog) embedding_para = fluid.global_scope().find_var( 'embedding_para').get_tensor() embedding_para.set(vocab.embeddings.astype(np.float32), place) # prepare data feed_list = [ main_program.global_block().var(var_name) for var_name in feed_order ] feeder = fluid.DataFeeder(feed_list, place) logger.info('Training the model...') parallel_executor = fluid.ParallelExecutor( main_program=main_program, use_cuda=bool(args.use_gpu), loss_name=avg_cost.name) print_para(main_program, parallel_executor, logger, args) for pass_id in range(1, args.pass_num + 1): pass_start_time = time.time() pad_id = vocab.get_id(vocab.pad_token) train_reader = lambda:brc_data.gen_mini_batches('train', args.batch_size, pad_id, shuffle=False) train_reader = read_multiple(train_reader, dev_count) log_every_n_batch, n_batch_loss = args.log_interval, 0 total_num, total_loss = 0, 0 for batch_id, batch_list in enumerate(train_reader(), 1): feed_data = batch_reader(batch_list, args) fetch_outs = parallel_executor.run( feed=list(feeder.feed_parallel(feed_data, dev_count)), fetch_list=[avg_cost_wd.name], return_numpy=False) cost_train = np.array(fetch_outs[0]).mean() total_num += args.batch_size * dev_count n_batch_loss += cost_train total_loss += cost_train * args.batch_size * dev_count if log_every_n_batch > 0 and batch_id % log_every_n_batch == 0: print_para(main_program, parallel_executor, logger, args) logger.info( 'Average loss from batch {} to {} is {}'.format( batch_id - log_every_n_batch + 1, batch_id, "%.10f" % (n_batch_loss / log_every_n_batch))) n_batch_loss = 0 if args.dev_interval > 0 and batch_id % args.dev_interval == 0: if brc_data.dev_set is not None: eval_loss, bleu_rouge = validation( inference_program, avg_cost, s_probs, e_probs, match, feed_order, place, dev_count, vocab, brc_data, logger, args) logger.info('Dev eval loss {}'.format(eval_loss)) logger.info('Dev eval result: {}'.format( bleu_rouge)) pass_end_time = time.time() logger.info('Evaluating the model after epoch {}'.format( pass_id)) if brc_data.dev_set is not None: eval_loss, bleu_rouge = validation( inference_program, avg_cost, s_probs, e_probs, match, feed_order, place, dev_count, vocab, brc_data, logger, args) logger.info('Dev eval loss {}'.format(eval_loss)) logger.info('Dev eval result: {}'.format(bleu_rouge)) else: logger.warning( 'No dev set is loaded for evaluation in the dataset!') time_consumed = pass_end_time - pass_start_time logger.info('Average train loss for epoch {} is {}'.format( pass_id, "%.10f" % (1.0 * total_loss / total_num))) if pass_id % args.save_interval == 0: model_path = os.path.join(args.save_dir, str(pass_id)) if not os.path.isdir(model_path): os.makedirs(model_path) fluid.io.save_persistables( executor=exe, dirname=model_path, main_program=main_program) def evaluate(logger, args): logger.info('Load data_set and vocab...') with open(os.path.join(args.vocab_dir, 'vocab.data'), 'rb') as fin: vocab = pickle.load(fin) logger.info('vocab size is {} and embed dim is {}'.format(vocab.size( ), vocab.embed_dim)) brc_data = BRCDataset( args.max_p_num, args.max_p_len, args.max_q_len, dev_files=args.devset) logger.info('Converting text into ids...') brc_data.convert_to_ids(vocab) logger.info('Initialize the model...') # build model main_program = fluid.Program() startup_prog = fluid.Program() main_program.random_seed = args.random_seed startup_prog.random_seed = args.random_seed with fluid.program_guard(main_program, startup_prog): with fluid.unique_name.guard(): avg_cost, s_probs, e_probs, match, feed_order = rc_model.rc_model( args.hidden_size, vocab, args) # initialize parameters if not args.use_gpu: place = fluid.CPUPlace() dev_count = int( os.environ.get('CPU_NUM', multiprocessing.cpu_count())) else: place = fluid.CUDAPlace(0) dev_count = fluid.core.get_cuda_device_count() exe = Executor(place) if args.load_dir: logger.info('load from {}'.format(args.load_dir)) fluid.io.load_persistables( exe, args.load_dir, main_program=main_program) else: logger.error('No model file to load ...') return inference_program = main_program.clone(for_test=True) eval_loss, bleu_rouge = validation( inference_program, avg_cost, s_probs, e_probs, feed_order, place, dev_count, vocab, brc_data, logger, args) logger.info('Dev eval loss {}'.format(eval_loss)) logger.info('Dev eval result: {}'.format(bleu_rouge)) logger.info('Predicted answers are saved to {}'.format( os.path.join(args.result_dir))) def predict(logger, args): logger.info('Load data_set and vocab...') with open(os.path.join(args.vocab_dir, 'vocab.data'), 'rb') as fin: vocab = pickle.load(fin) logger.info('vocab size is {} and embed dim is {}'.format(vocab.size( ), vocab.embed_dim)) brc_data = BRCDataset( args.max_p_num, args.max_p_len, args.max_q_len, dev_files=args.testset) logger.info('Converting text into ids...') brc_data.convert_to_ids(vocab) logger.info('Initialize the model...') # build model main_program = fluid.Program() startup_prog = fluid.Program() main_program.random_seed = args.random_seed startup_prog.random_seed = args.random_seed with fluid.program_guard(main_program, startup_prog): with fluid.unique_name.guard(): avg_cost, s_probs, e_probs, match, feed_order = rc_model.rc_model( args.hidden_size, vocab, args) # initialize parameters if not args.use_gpu: place = fluid.CPUPlace() dev_count = int( os.environ.get('CPU_NUM', multiprocessing.cpu_count())) else: place = fluid.CUDAPlace(0) dev_count = fluid.core.get_cuda_device_count() exe = Executor(place) if args.load_dir: logger.info('load from {}'.format(args.load_dir)) fluid.io.load_persistables( exe, args.load_dir, main_program=main_program) else: logger.error('No model file to load ...') return inference_program = main_program.clone(for_test=True) eval_loss, bleu_rouge = validation( inference_program, avg_cost, s_probs, e_probs, match, feed_order, place, dev_count, vocab, brc_data, logger, args) def prepare(logger, args): """ checks data, creates the directories, prepare the vocabulary and embeddings """ logger.info('Checking the data files...') for data_path in args.trainset + args.devset + args.testset: assert os.path.exists(data_path), '{} file does not exist.'.format( data_path) logger.info('Preparing the directories...') for dir_path in [args.vocab_dir, args.save_dir, args.result_dir]: if not os.path.exists(dir_path): os.makedirs(dir_path) logger.info('Building vocabulary...') brc_data = BRCDataset(args.max_p_num, args.max_p_len, args.max_q_len, args.trainset, args.devset, args.testset) vocab = Vocab(lower=True) for word in brc_data.word_iter('train'): vocab.add(word) unfiltered_vocab_size = vocab.size() vocab.filter_tokens_by_cnt(min_cnt=2) filtered_num = unfiltered_vocab_size - vocab.size() logger.info('After filter {} tokens, the final vocab size is {}'.format( filtered_num, vocab.size())) logger.info('Assigning embeddings...') vocab.randomly_init_embeddings(args.embed_size) logger.info('Saving vocab...') with open(os.path.join(args.vocab_dir, 'vocab.data'), 'wb') as fout: pickle.dump(vocab, fout) logger.info('Done with preparing!') if __name__ == '__main__': args = parse_args() random.seed(args.random_seed) np.random.seed(args.random_seed) logger = logging.getLogger("brc") logger.setLevel(logging.INFO) formatter = logging.Formatter( '%(asctime)s - %(name)s - %(levelname)s - %(message)s') if args.log_path: file_handler = logging.FileHandler(args.log_path) file_handler.setLevel(logging.INFO) file_handler.setFormatter(formatter) logger.addHandler(file_handler) else: console_handler = logging.StreamHandler() console_handler.setLevel(logging.INFO) console_handler.setFormatter(formatter) logger.addHandler(console_handler) args = parse_args() logger.info('Running with args : {}'.format(args)) if args.prepare: prepare(logger, args) if args.train: train(logger, args) if args.evaluate: evaluate(logger, args) if args.predict: predict(logger, args)