文本分类-04BiLSTM

Posted 2020-12-18 yifanrensheng

目录

1. 大纲概述
2. 数据集合
3. 数据处理
4. 预训练word2vec模型

一、大纲概述

文本分类这个系列将会有8篇左右文章，从github直接下载代码，从百度云下载训练数据，在pycharm上导入即可使用，包括基于word2vec预训练的文本分类，与及基于近几年的预训练模型（ELMo，BERT等）的文本分类。总共有以下系列：

word2vec预训练词向量

textCNN 模型

charCNN 模型

Bi-LSTM 模型

Bi-LSTM + Attention 模型

Transformer 模型

ELMo 预训练模型

BERT 预训练模型

二、数据集合

数据集为IMDB 电影影评，总共有三个数据文件，在/data/rawData目录下，包括unlabeledTrainData.tsv，labeledTrainData.tsv，testData.tsv。在进行文本分类时需要有标签的数据（labeledTrainData），但是在训练word2vec词向量模型（无监督学习）时可以将无标签的数据一起用上。

训练数据地址：链接：https://pan.baidu.com/s/1-XEwx1ai8kkGsMagIFKX_g 提取码：rtz8

三、主要代码　

3.1 配置训练参数：parameter_config.py

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# 配置参数 class TrainingConfig(object): epoches = 10 evaluateEvery = 100 checkpointEvery = 100 learningRate = 0.001 ? ? class ModelConfig(object): embeddingSize = 200 hiddenSizes = [256, 256] # 单层LSTM结构的神经元个数 dropoutKeepProb = 0.5 l2RegLambda = 0.0 ? ? class Config(object): sequenceLength = 200 # 取了所有序列长度的均值 batchSize = 128 dataSource = "../data/preProcess/labeledTrain.csv" stopWordSource = "../data/english" numClasses = 1 # 二分类设置为1，多分类设置为类别的数目 rate = 0.8 # 训练集的比例 training = TrainingConfig() model = ModelConfig() ? ? # 实例化配置参数对象 # config = Config()

3.2 获取训练数据：get_train_data.py

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# Author:yifan import json from collections import Counter import gensim import pandas as pd import numpy as np import parameter_config ? ? # 2 数据预处理的类，生成训练集和测试集 # 　　1）将数据加载进来，将句子分割成词表示，并去除低频词和停用词。 # 　　2）将词映射成索引表示，构建词汇-索引映射表，并保存成json的数据格式， # 之后做inference时可以用到。（注意，有的词可能不在word2vec的预训练词向量中，这种词直接用UNK表示） # 　　3）从预训练的词向量模型中读取出词向量，作为初始化值输入到模型中。 # 　　4）将数据集分割成训练集和测试集 ? ? class Dataset(object): def __init__(self, config): self.config = config self._dataSource = config.dataSource self._stopWordSource = config.stopWordSource self._sequenceLength = config.sequenceLength # 每条输入的序列处理为定长 self._embeddingSize = config.model.embeddingSize self._batchSize = config.batchSize self._rate = config.rate self._stopWordDict = {} self.trainReviews = [] self.trainLabels = [] self.evalReviews = [] self.evalLabels = [] self.wordEmbedding = None self.labelList = [] ? ? def _readData(self, filePath): """ 从csv文件中读取数据集 """ df = pd.read_csv(filePath) if self.config.numClasses == 1: labels = df["sentiment"].tolist() elif self.config.numClasses > 1: labels = df["rate"].tolist() review = df["review"].tolist() reviews = [line.strip().split() for line in review] return reviews, labels ? ? def _labelToIndex(self, labels, label2idx): """ 将标签转换成索引表示 """ labelIds = [label2idx[label] for label in labels] return labelIds ? ? def _wordToIndex(self, reviews, word2idx): """ 将词转换成索引 """ reviewIds = [[word2idx.get(item, word2idx["UNK"]) for item in review] for review in reviews] return reviewIds ? ? def _genTrainEvalData(self, x, y, word2idx, rate): """ 生成训练集和验证集 """ reviews = [] for review in x: if len(review) >= self._sequenceLength: reviews.append(review[:self._sequenceLength]) else: reviews.append(review + [word2idx["PAD"]] * (self._sequenceLength - len(review))) trainIndex = int(len(x) * rate) trainReviews = np.asarray(reviews[:trainIndex], dtype="int64") trainLabels = np.array(y[:trainIndex], dtype="float32") evalReviews = np.asarray(reviews[trainIndex:], dtype="int64") evalLabels = np.array(y[trainIndex:], dtype="float32") return trainReviews, trainLabels, evalReviews, evalLabels ? ? def _getWordEmbedding(self, words): """ 按照我们的数据集中的单词取出预训练好的word2vec中的词向量 """ wordVec = gensim.models.KeyedVectors.load_word2vec_format("../word2vec/word2Vec.bin", binary=True) vocab = [] wordEmbedding = [] # 添加 "pad" 和 "UNK", vocab.append("PAD") vocab.append("UNK") wordEmbedding.append(np.zeros(self._embeddingSize)) wordEmbedding.append(np.random.randn(self._embeddingSize)) ? ? for word in words: try: vector = wordVec.wv[word] vocab.append(word) wordEmbedding.append(vector) except: print(word + "不存在于词向量中") ? ? return vocab, np.array(wordEmbedding) ? ? def _genVocabulary(self, reviews, labels): """ 生成词向量和词汇-索引映射字典，可以用全数据集 """ allWords = [word for review in reviews for word in review] ? ? # 去掉停用词 subWords = [word for word in allWords if word not in self.stopWordDict] wordCount = Counter(subWords) # 统计词频 sortWordCount = sorted(wordCount.items(), key=lambda x: x[1], reverse=True) # 去除低频词 words = [item[0] for item in sortWordCount if item[1] >= 5] ? ? vocab, wordEmbedding = self._getWordEmbedding(words) self.wordEmbedding = wordEmbedding word2idx = dict(zip(vocab, list(range(len(vocab))))) ? ? uniqueLabel = list(set(labels)) label2idx = dict(zip(uniqueLabel, list(range(len(uniqueLabel))))) self.labelList = list(range(len(uniqueLabel))) # 将词汇-索引映射表保存为json数据，之后做inference时直接加载来处理数据 with open("../data/wordJson/word2idx.json", "w", encoding="utf-8") as f: json.dump(word2idx, f) ? ? with open("../data/wordJson/label2idx.json", "w", encoding="utf-8") as f: json.dump(label2idx, f) ? ? return word2idx, label2idx ? ? def _readStopWord(self, stopWordPath): """ 读取停用词 """ ? ? with open(stopWordPath, "r") as f: stopWords = f.read() stopWordList = stopWords.splitlines() # 将停用词用列表的形式生成，之后查找停用词时会比较快 self.stopWordDict = dict(zip(stopWordList, list(range(len(stopWordList))))) ? ? def dataGen(self): """ 初始化训练集和验证集 """ # 初始化停用词 self._readStopWord(self._stopWordSource) ? ? # 初始化数据集 reviews, labels = self._readData(self._dataSource) ? ? # 初始化词汇-索引映射表和词向量矩阵 word2idx, label2idx = self._genVocabulary(reviews, labels) ? ? # 将标签和句子数值化 labelIds = self._labelToIndex(labels, label2idx) reviewIds = self._wordToIndex(reviews, word2idx) ? ? # 初始化训练集和测试集 trainReviews, trainLabels, evalReviews, evalLabels = self._genTrainEvalData(reviewIds, labelIds, word2idx, self._rate) self.trainReviews = trainReviews self.trainLabels = trainLabels ? ? self.evalReviews = evalReviews self.evalLabels = evalLabels ? ? #获取前些模块的数据 config =parameter_config.Config() data = Dataset(config) data.dataGen()

3.3 模型构建：mode_structure.py

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import tensorflow as tf import parameter_config # 3 构建模型 Bi-LSTM模型 class BiLSTM(object): """ Bi-LSTM 用于文本分类 """ def __init__(self, config, wordEmbedding): # 定义模型的输入 self.inputX = tf.placeholder(tf.int32, [None, config.sequenceLength], name="inputX") self.inputY = tf.placeholder(tf.int32, [None], name="inputY") self.dropoutKeepProb = tf.placeholder(tf.float32, name="dropoutKeepProb") ? ? # 定义l2损失 l2Loss = tf.constant(0.0) ? ? # 词嵌入层 with tf.name_scope("embedding"): # 利用预训练的词向量初始化词嵌入矩阵 self.W = tf.Variable(tf.cast(wordEmbedding, dtype=tf.float32, name="word2vec"), name="W") # 利用词嵌入矩阵将输入的数据中的词转换成词向量，维度[batch_size, sequence_length, embedding_size] self.embeddedWords = tf.nn.embedding_lookup(self.W, self.inputX) ? ? # 定义两层双向LSTM的模型结构 with tf.name_scope("Bi-LSTM"): for idx, hiddenSize in enumerate(config.model.hiddenSizes): with tf.name_scope("Bi-LSTM" + str(idx)): # 定义前向LSTM结构 lstmFwCell = tf.nn.rnn_cell.DropoutWrapper( tf.nn.rnn_cell.LSTMCell(num_units=hiddenSize, state_is_tuple=True), output_keep_prob=self.dropoutKeepProb) # 定义反向LSTM结构 lstmBwCell = tf.nn.rnn_cell.DropoutWrapper( tf.nn.rnn_cell.LSTMCell(num_units=hiddenSize, state_is_tuple=True), output_keep_prob=self.dropoutKeepProb) ? ? # 采用动态rnn，可以动态的输入序列的长度，若没有输入，则取序列的全长 # outputs是一个元祖(output_fw, output_bw)，其中两个元素的维度都是[batch_size, max_time, hidden_size],fw和bw的hidden_size一样 # self.current_state 是最终的状态，二元组(state_fw, state_bw)，state_fw=[batch_size, s]，s是一个元祖(h, c) outputs, self.current_state = tf.nn.bidirectional_dynamic_rnn(lstmFwCell, lstmBwCell, self.embeddedWords, dtype=tf.float32, scope="bi-lstm" + str(idx)) ? ? # 对outputs中的fw和bw的结果拼接 [batch_size, time_step, hidden_size * 2] self.embeddedWords = tf.concat(outputs, 2) ? ? # 去除最后时间步的输出作为全连接的输入 finalOutput = self.embeddedWords[:, 0, :] ? ? outputSize = config.model.hiddenSizes[-1] * 2 # 因为是双向LSTM，最终的输出值是fw和bw的拼接，因此要乘以2 output = tf.reshape(finalOutput, [-1, outputSize]) # reshape成全连接层的输入维度 ? ? # 全连接层的输出 with tf.name_scope("output"): outputW = tf.get_variable( "outputW", shape=[outputSize, config.numClasses], initializer=tf.contrib.layers.xavier_initializer()) ? ? outputB = tf.Variable(tf.constant(0.1, shape=[config.numClasses]), name="outputB") l2Loss += tf.nn.l2_loss(outputW) l2Loss += tf.nn.l2_loss(outputB) self.logits = tf.nn.xw_plus_b(output, outputW, outputB, name="logits") if config.numClasses == 1: self.predictions = tf.cast(tf.greater_equal(self.logits, 0.0), tf.float32, name="predictions") elif config.numClasses > 1: self.predictions = tf.argmax(self.logits, axis=-1, name="predictions") ? ? # 计算二元交叉熵损失 with tf.name_scope("loss"): if config.numClasses == 1: losses = tf.nn.sigmoid_cross_entropy_with_logits(logits=self.logits, labels=tf.cast(tf.reshape(self.inputY, [-1, 1]), dtype=tf.float32)) elif config.numClasses > 1: losses = tf.nn.sparse_softmax_cross_entropy_with_logits(logits=self.logits, labels=self.inputY) ? ? self.loss = tf.reduce_mean(losses) + config.model.l2RegLambda * l2Loss

3.4 模型训练：mode_trainning.py

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import os import datetime import numpy as np import tensorflow as tf import parameter_config import get_train_data import mode_structure ? ? #因为电脑内存较小，只能选择CPU去训练了 os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID" os.environ["CUDA_VISIBLE_DEVICES"] = "-1" ? ? #获取前些模块的数据 config =parameter_config.Config() data = get_train_data.Dataset(config) data.dataGen() ? ? #4生成batch数据集 def nextBatch(x, y, batchSize): # 生成batch数据集，用生成器的方式输出 perm = np.arange(len(x)) np.random.shuffle(perm) x = x[perm] y = y[perm] numBatches = len(x) // batchSize ? ? for i in range(numBatches): start = i * batchSize end = start + batchSize batchX = np.array(x[start: end], dtype="int64") batchY = np.array(y[start: end], dtype="float32") yield batchX, batchY ? ? # 5 定义计算metrics的函数 """ 定义各类性能指标 """ """ 定义各类性能指标 """ ? ? def mean(item: list) -> float: """ 计算列表中元素的平均值 :param item: 列表对象 :return: """ res = sum(item) / len(item) if len(item) > 0 else 0 return res ? ? def accuracy(pred_y, true_y): """ 计算二类和多类的准确率 :param pred_y: 预测结果 :param true_y: 真实结果 :return: """ if isinstance(pred_y[0], list): pred_y = [item[0] for item in pred_y] corr = 0 for i in range(len(pred_y)): if pred_y[i] == true_y[i]: corr += 1 acc = corr / len(pred_y) if len(pred_y) > 0 else 0 return acc ? ? def binary_precision(pred_y, true_y, positive=1): """ 二类的精确率计算 :param pred_y: 预测结果 :param true_y: 真实结果 :param positive: 正例的索引表示 :return: """ corr = 0 pred_corr = 0 for i in range(len(pred_y)): if pred_y[i] == positive: pred_corr += 1 if pred_y[i] == true_y[i]: corr += 1 ? ? prec = corr / pred_corr if pred_corr > 0 else 0 return prec ? ? def binary_recall(pred_y, true_y, positive=1): """ 二类的召回率 :param pred_y: 预测结果 :param true_y: 真实结果 :param positive: 正例的索引表示 :return: """ corr = 0 true_corr = 0 for i in range(len(pred_y)): if true_y[i] == positive: true_corr += 1 if pred_y[i] == true_y[i]: corr += 1 ? ? rec = corr / true_corr if true_corr > 0 else 0 return re ? ? def binary_f_beta(pred_y, true_y, beta=1.0, positive=1): """ 二类的f beta值 :param pred_y: 预测结果 :param true_y: 真实结果 :param beta: beta值 :param positive: 正例的索引表示 :return: """ precision = binary_precision(pred_y, true_y, positive) recall = binary_recall(pred_y, true_y, positive) try: f_b = (1 + beta * beta) * precision * recall / (beta * beta * precision + recall) except: f_b = 0 return f_b ? ? def multi_precision(pred_y, true_y, labels): """ 多类的精确率 :param pred_y: 预测结果 :param true_y: 真实结果 :param labels: 标签列表 :return: """ if isinstance(pred_y[0], list): pred_y = [item[0] for item in pred_y] ? ? precisions = [binary_precision(pred_y, true_y, label) for label in labels] prec = mean(precisions) return prec ? ? def multi_recall(pred_y, true_y, labels): """ 多类的召回率 :param pred_y: 预测结果 :param true_y: 真实结果 :param labels: 标签列表 :return: """ if isinstance(pred_y[0], list): pred_y = [item[0] for item in pred_y] ? ? recalls = [binary_recall(pred_y, true_y, label) for label in labels] rec = mean(recalls) return rec ? ? def multi_f_beta(pred_y, true_y, labels, beta=1.0): """ 多类的f beta值 :param pred_y: 预测结果 :param true_y: 真实结果 :param labels: 标签列表 :param beta: beta值 :return: """ if isinstance(pred_y[0], list): pred_y = [item[0] for item in pred_y] ? ? f_betas = [binary_f_beta(pred_y, true_y, beta, label) for label in labels] f_beta = mean(f_betas) return f_beta ? ? def get_binary_metrics(pred_y, true_y, f_beta=1.0): """ 得到二分类的性能指标 :param pred_y: :param true_y: :param f_beta: :return: """ acc = accuracy(pred_y, true_y) recall = binary_recall(pred_y, true_y) precision = binary_precision(pred_y, true_y) f_beta = binary_f_beta(pred_y, true_y, f_beta) return acc, recall, precision, f_beta ? ? def get_multi_metrics(pred_y, true_y, labels, f_beta=1.0): """ 得到多分类的性能指标 :param pred_y: :param true_y: :param labels: :param f_beta: :return: """ acc = accuracy(pred_y, true_y) recall = multi_recall(pred_y, true_y, labels) precision = multi_precision(pred_y, true_y, labels) f_beta = multi_f_beta(pred_y, true_y, labels, f_beta) return acc, recall, precision, f_beta ? ? # 6 训练模型 # 生成训练集和验证集 trainReviews = data.trainReviews trainLabels = data.trainLabels evalReviews = data.evalReviews evalLabels = data.evalLabels ? ? wordEmbedding = data.wordEmbedding labelList = data.labelList ? ? # 定义计算图 with tf.Graph().as_default(): session_conf = tf.ConfigProto(allow_soft_placement=True, log_device_placement=False) session_conf.gpu_options.allow_growth = True session_conf.gpu_options.per_process_gpu_memory_fraction = 0.9 # 配置gpu占用率 ? ? sess = tf.Session(config=session_conf) ? ? # 定义会话 with sess.as_default(): lstm = mode_structure.BiLSTM(config, wordEmbedding) globalStep = tf.Variable(0, name="globalStep", trainable=False) # 定义优化函数，传入学习速率参数 optimizer = tf.train.AdamOptimizer(config.training.learningRate) # 计算梯度,得到梯度和变量 gradsAndVars = optimizer.compute_gradients(lstm.loss) # 将梯度应用到变量下，生成训练器 trainOp = optimizer.apply_gradients(gradsAndVars, global_step=globalStep) ? ? # 用summary绘制tensorBoard gradSummaries = [] for g, v in gradsAndVars: if g is not None: tf.summary.histogram("{}/grad/hist".format(v.name), g) tf.summary.scalar("{}/grad/sparsity".format(v.name), tf.nn.zero_fraction(g)) ? ? outDir = os.path.abspath(os.path.join(os.path.curdir, "summarys")) print("Writing to {} ".format(outDir)) ? ? lossSummary = tf.summary.scalar("loss", lstm.loss) summaryOp = tf.summary.merge_all() ? ? trainSummaryDir = os.path.join(outDir, "train") trainSummaryWriter = tf.summary.FileWriter(trainSummaryDir, sess.graph) ? ? evalSummaryDir = os.path.join(outDir, "eval") evalSummaryWriter = tf.summary.FileWriter(evalSummaryDir, sess.graph) ? ? # 初始化所有变量 saver = tf.train.Saver(tf.global_variables(), max_to_keep=5) ? ? # 保存模型的一种方式，保存为pb文件 savedModelPath = "../model/Bi-LSTM/savedModel" if os.path.exists(savedModelPath): os.rmdir(savedModelPath) builder = tf.saved_model.builder.SavedModelBuilder(savedModelPath) ? ? sess.run(tf.global_variables_initializer()) ? ? def trainStep(batchX, batchY): """ 训练函数 """ feed_dict = { lstm.inputX: batchX, lstm.inputY: batchY, lstm.dropoutKeepProb: config.model.dropoutKeepProb } _, summary, step, loss, predictions = sess.run( [trainOp, summaryOp, globalStep, lstm.loss, lstm.predictions], feed_dict) ? ? timeStr = datetime.datetime.now().isoformat() ? ? if config.numClasses == 1: acc, recall, prec, f_beta = get_binary_metrics(pred_y=predictions, true_y=batchY) ? ? elif config.numClasses > 1: acc, recall, prec, f_beta = get_multi_metrics(pred_y=predictions, true_y=batchY, labels=labelList) ? ? trainSummaryWriter.add_summary(summary, step) ? ? return loss, acc, prec, recall, f_beta ? ? def devStep(batchX, batchY): """ 验证函数 """ feed_dict = { lstm.inputX: batchX, lstm.inputY: batchY, lstm.dropoutKeepProb: 1.0 } summary, step, loss, predictions = sess.run( [summaryOp, globalStep, lstm.loss, lstm.predictions], feed_dict) ? ? if config.numClasses == 1: acc, precision, recall, f_beta = get_binary_metrics(pred_y=predictions, true_y=batchY) elif config.numClasses > 1: acc, precision, recall, f_beta = get_multi_metrics(pred_y=predictions, true_y=batchY, labels=labelList) ? ? evalSummaryWriter.add_summary(summary, step) ? ? return loss, acc, precision, recall, f_beta ? ? for i in range(config.training.epoches): # 训练模型 print("start training model") for batchTrain in nextBatch(trainReviews, trainLabels, config.batchSize): loss, acc, prec, recall, f_beta = trainStep(batchTrain[0], batchTrain[1]) ? ? currentStep = tf.train.global_step(sess, globalStep) print("train: step: {}, loss: {}, acc: {}, recall: {}, precision: {}, f_beta: {}".format( currentStep, loss, acc, recall, prec, f_beta)) if currentStep % config.training.evaluateEvery == 0: print(" Evaluation:") ? ? losses = [] accs = [] f_betas = [] precisions = [] recalls = [] ? ? for batchEval in nextBatch(evalReviews, evalLabels, config.batchSize): loss, acc, precision, recall, f_beta = devStep(batchEval[0], batchEval[1]) losses.append(loss) accs.append(acc) f_betas.append(f_beta) precisions.append(precision) recalls.append(recall) ? ? time_str = datetime.datetime.now().isoformat() print("{}, step: {}, loss: {}, acc: {},precision: {}, recall: {}, f_beta: {}".format(time_str, currentStep, mean(losses), mean(accs), mean( precisions), mean(recalls), mean(f_betas))) ? ? if currentStep % config.training.checkpointEvery == 0: # 保存模型的另一种方法，保存checkpoint文件 path = saver.save(sess, "../model/Bi-LSTM/model/my-model", global_step=currentStep) print("Saved model checkpoint to {} ".format(path)) ? ? inputs = {"inputX": tf.saved_model.utils.build_tensor_info(lstm.inputX), "keepProb": tf.saved_model.utils.build_tensor_info(lstm.dropoutKeepProb)} ? ? outputs = {"predictions": tf.saved_model.utils.build_tensor_info(lstm.predictions)}#这里应该是lstm.binaryPreds。 ? ? prediction_signature = tf.saved_model.signature_def_utils.build_signature_def(inputs=inputs, outputs=outputs, method_name=tf.saved_model.signature_constants.PREDICT_METHOD_NAME) legacy_init_op = tf.group(tf.tables_initializer(), name="legacy_init_op") builder.add_meta_graph_and_variables(sess, [tf.saved_model.tag_constants.SERVING], signature_def_map={"predict": prediction_signature}, legacy_init_op=legacy_init_op) ? ? builder.save()

3.5 预测：predict.py

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# Author:yifan import os import csv import time import datetime import random import json from collections import Counter from math import sqrt import gensim import pandas as pd import numpy as np import tensorflow as tf from sklearn.metrics import roc_auc_score, accuracy_score, precision_score, recall_score import parameter_config config =parameter_config.Config() ? ? #7预测代码 x = "this movie is full of references like mad max ii the wild one and many others the ladybug′s face it′s a clear reference or tribute to peter lorre this movie is a masterpiece we′ll talk much more about in the future" ? ? # 注：下面两个词典要保证和当前加载的模型对应的词典是一致的 with open("../data/wordJson/word2idx.json", "r", encoding="utf-8") as f: word2idx = json.load(f) ? ? with open("../data/wordJson/label2idx.json", "r", encoding="utf-8") as f: label2idx = json.load(f) idx2label = {value: key for key, value in label2idx.items()} ? ? xIds = [word2idx.get(item, word2idx["UNK"]) for item in x.split(" ")] if len(xIds) >= config.sequenceLength: xIds = xIds[:config.sequenceLength] else: xIds = xIds + [word2idx["PAD"]] * (config.sequenceLength - len(xIds)) ? ? graph = tf.Graph() with graph.as_default(): gpu_options = tf.GPUOptions(per_process_gpu_memory_fraction=0.333) session_conf = tf.ConfigProto(allow_soft_placement=True, log_device_placement=False, gpu_options=gpu_options) sess = tf.Session(config=session_conf) ? ? with sess.as_default(): checkpoint_file = tf.train.latest_checkpoint("../model/Bi-LSTM/model/") saver = tf.train.import_meta_graph("{}.meta".format(checkpoint_file)) saver.restore(sess, checkpoint_file) ? ? # 获得需要喂给模型的参数，输出的结果依赖的输入值 inputX = graph.get_operation_by_name("inputX").outputs[0] dropoutKeepProb = graph.get_operation_by_name("dropoutKeepProb").outputs[0] ? ? # 获得输出的结果 predictions = graph.get_tensor_by_name("output/predictions:0") ? ? pred = sess.run(predictions, feed_dict={inputX: [xIds], dropoutKeepProb: 1.0})[0] ? ? # print(pred) pred = [idx2label[item] for item in pred] print(pred)

结果

相关代码可见：https://github.com/yifanhunter/NLP_textClassifier

主要参考：

【1】 https://home.cnblogs.com/u/jiangxinyang/