【自然语言处理（NLP）实战】LSTM网络实现中文文本情感分析（手把手与教学超详细）

目录

引言：

1.所有文件展示：

1.中文停用词数据（hit_stopwords.txt)来源于：

2.其中data数据集为chinese_text_cnn-master.zip提取出的文件。点击链接进入github，点击Code、Download ZIP即可下载。

2.安装依赖库：

3.数据预处理（data_set.py)：

train.txt-去除停用词后的训练集文件：

test.txt -去除停用词后的测试集文件：

4. 模型训练以及保存（main.py)

1.LSTM模型搭建：

2.main.py代价展示 ：

 3.模型保存

4.训练结果 

5.LSTM模型测试（test.py) 

 1.测试结果：

2.测试结果：

6.完整代码展示：

1.data_set.py

2.mian.py

3.test.py 

---

引言：

在当今数字化时代，人们在社交媒体、评论平台以及各类在线交流中产生了海量的文本数据。这些数据蕴含着丰富的情感信息，从而成为了深入理解用户态度、市场趋势，甚至社会情绪的宝贵资源。自然语言处理（NLP）的发展为我们提供了强大的工具，使得对文本情感进行分析成为可能。在这个领域中，长短时记忆网络（LSTM）凭借其能够捕捉文本序列中长距离依赖关系的能力，成为了情感分析任务中的一项重要技术。

本篇博客将手把手地教你如何使用LSTM网络实现中文文本情感分析。我们将从数据预处理开始，逐步构建一个端到端的情感分析模型。通过详细的步骤和示例代码，深入了解如何处理中文文本数据、构建LSTM模型、进行训练和评估。

1.所有文件展示：

1.中文停用词数据（hit_stopwords.txt)来源于：

项目目录预览 - stopwords - GitCode

2.其中data数据集为chinese_text_cnn-master.zip提取出的文件。点击链接进入github，点击Code、Download ZIP即可下载。

2.安装依赖库：

pip install torch # 搭建LSTM模型
pip install gensim # 中文文本词向量转换
pip install numpy # 数据清洗、预处理
pip install pandas

3.数据预处理（data_set.py)：

# -*- coding: utf-8 -*-
# @Time : 2023/11/15 10:52
# @Author :Muzi
# @File : data_set.py
# @Software: PyCharm
import pandas as pd
import jieba# 数据读取
def load_tsv(file_path):data = pd.read_csv(file_path, sep='\t')data_x = data.iloc[:, -1]data_y = data.iloc[:, 1]return data_x, data_ytrain_x, train_y = load_tsv("./data/train.tsv")
test_x, test_y = load_tsv("./data/test.tsv")
train_x=[list(jieba.cut(x)) for x in train_x]
test_x=[list(jieba.cut(x)) for x in test_x]with open('./hit_stopwords.txt','r',encoding='UTF8') as f:stop_words=[word.strip() for word in f.readlines()]print('Successfully')
def drop_stopword(datas):for data in datas:for word in data:if word in stop_words:data.remove(word)return datasdef save_data(datax,path):with open(path, 'w', encoding="UTF8") as f:for lines in datax:for i, line in enumerate(lines):f.write(str(line))# 如果不是最后一行，就添加一个逗号if i != len(lines) - 1:f.write(',')f.write('\n')if __name__ == '__main':train_x=drop_stopword(train_x)test_x=drop_stopword(test_x)save_data(train_x,'./train.txt')save_data(test_x,'./test.txt')print('Successfully')

train.txt-去除停用词后的训练集文件：

 

test.txt -去除停用词后的测试集文件：

4. 模型训练以及保存（main.py)

1.LSTM模型搭建：

不同的数据集应该有不同的分类标准，我这里用到的数据模型属于二分类问题

# 定义LSTM模型
class LSTMModel(nn.Module):def __init__(self, input_size, hidden_size, output_size):super(LSTMModel, self).__init__()self.lstm = nn.LSTM(input_size, hidden_size, batch_first=True)self.fc = nn.Linear(hidden_size, output_size)def forward(self, x):lstm_out, _ = self.lstm(x)output = self.fc(lstm_out[:, -1, :])  # 取序列的最后一个输出return output# 定义模型
input_size = word2vec_model.vector_size
hidden_size = 50  # 你可以根据需要调整隐藏层大小
output_size = 2  # 输出的大小，根据你的任务而定model = LSTMModel(input_size, hidden_size, output_size)
# 定义损失函数和优化器
criterion = nn.CrossEntropyLoss()  # 交叉熵损失函数
optimizer = torch.optim.Adam(model.parameters(), lr=0.0002)

2.main.py代价展示 ：

# -*- coding: utf-8 -*-
# @Time : 2023/11/13 20:31
# @Author :Muzi
# @File : mian.py.py
# @Software: PyCharm
import pandas as pd
import torch
from torch import nn
import jieba
from gensim.models import Word2Vec
import numpy as np
from data_set import load_tsv
from torch.utils.data import DataLoader, TensorDataset# 数据读取
def load_txt(path):with open(path,'r',encoding='utf-8') as f:data=[[line.strip()] for line in f.readlines()]return datatrain_x=load_txt('train.txt')
test_x=load_txt('test.txt')
train=train_x+test_x
X_all=[i for x in train for i in x]_, train_y = load_tsv("./data/train.tsv")
_, test_y = load_tsv("./data/test.tsv")
# 训练Word2Vec模型
word2vec_model = Word2Vec(sentences=X_all, vector_size=100, window=5, min_count=1, workers=4)# 将文本转换为Word2Vec向量表示
def text_to_vector(text):vector = [word2vec_model.wv[word] for word in text if word in word2vec_model.wv]return sum(vector) / len(vector) if vector else [0] * word2vec_model.vector_sizeX_train_w2v = [[text_to_vector(text)] for line in train_x for text in line]
X_test_w2v = [[text_to_vector(text)] for line in test_x for text in line]# 将词向量转换为PyTorch张量
X_train_array = np.array(X_train_w2v, dtype=np.float32)
X_train_tensor = torch.Tensor(X_train_array)
X_test_array = np.array(X_test_w2v, dtype=np.float32)
X_test_tensor = torch.Tensor(X_test_array)
#使用DataLoader打包文件
train_dataset = TensorDataset(X_train_tensor, torch.LongTensor(train_y))
train_loader = DataLoader(train_dataset, batch_size=64, shuffle=True)
test_dataset = TensorDataset(X_test_tensor,torch.LongTensor(test_y))
test_loader = DataLoader(test_dataset, batch_size=64, shuffle=True)
# 定义LSTM模型
class LSTMModel(nn.Module):def __init__(self, input_size, hidden_size, output_size):super(LSTMModel, self).__init__()self.lstm = nn.LSTM(input_size, hidden_size, batch_first=True)self.fc = nn.Linear(hidden_size, output_size)def forward(self, x):lstm_out, _ = self.lstm(x)output = self.fc(lstm_out[:, -1, :])  # 取序列的最后一个输出return output# 定义模型
input_size = word2vec_model.vector_size
hidden_size = 50  # 你可以根据需要调整隐藏层大小
output_size = 2  # 输出的大小，根据你的任务而定model = LSTMModel(input_size, hidden_size, output_size)
# 定义损失函数和优化器
criterion = nn.CrossEntropyLoss()  # 交叉熵损失函数
optimizer = torch.optim.Adam(model.parameters(), lr=0.0002)if __name__ == "__main__":# 训练模型num_epochs = 10log_interval = 100  # 每隔100个批次输出一次日志loss_min=100for epoch in range(num_epochs):model.train()for batch_idx, (data, target) in enumerate(train_loader):outputs = model(data)loss = criterion(outputs, target)optimizer.zero_grad()loss.backward()optimizer.step()if batch_idx % log_interval == 0:print('Epoch [{}/{}], Batch [{}/{}], Loss: {:.4f}'.format(epoch + 1, num_epochs, batch_idx, len(train_loader), loss.item()))# 保存最佳模型if loss.item()<loss_min:loss_min=loss.item()torch.save(model, 'model.pth')# 模型评估with torch.no_grad():model.eval()correct = 0total = 0for data, target in test_loader:outputs = model(data)_, predicted = torch.max(outputs.data, 1)total += target.size(0)correct += (predicted == target).sum().item()accuracy = correct / totalprint('Test Accuracy: {:.2%}'.format(accuracy))

 3.模型保存

 # 保存最佳模型if loss.item()<loss_min:loss_min=loss.item()torch.save(model, 'model.pth')

4.训练结果 

5.LSTM模型测试（test.py) 

# -*- coding: utf-8 -*-
# @Time : 2023/11/15 15:53
# @Author :Muzi
# @File : test.py.py
# @Software: PyCharm
import torch
import jieba
from torch import nn
from gensim.models import Word2Vec
import numpy as npclass LSTMModel(nn.Module):def __init__(self, input_size, hidden_size, output_size):super(LSTMModel, self).__init__()self.lstm = nn.LSTM(input_size, hidden_size, batch_first=True)self.fc = nn.Linear(hidden_size, output_size)def forward(self, x):lstm_out, _ = self.lstm(x)output = self.fc(lstm_out[:, -1, :])  # 取序列的最后一个输出return output# 数据读取
def load_txt(path):with open(path,'r',encoding='utf-8') as f:data=[[line.strip()] for line in f.readlines()]return data#去停用词
def drop_stopword(datas):# 假设你有一个函数用于预处理文本数据with open('./hit_stopwords.txt', 'r', encoding='UTF8') as f:stop_words = [word.strip() for word in f.readlines()]datas=[x for x in datas if x not in stop_words]return datasdef preprocess_text(text):text=list(jieba.cut(text))text=drop_stopword(text)return text# 将文本转换为Word2Vec向量表示
def text_to_vector(text):train_x = load_txt('train.txt')test_x = load_txt('test.txt')train = train_x + test_xX_all = [i for x in train for i in x]# 训练Word2Vec模型word2vec_model = Word2Vec(sentences=X_all, vector_size=100, window=5, min_count=1, workers=4)vector = [word2vec_model.wv[word] for word in text if word in word2vec_model.wv]return sum(vector) / len(vector) if vector else [0] * word2vec_model.vector_sizeif __name__ == '__main__':# input_text = "这个车完全就是垃圾,又热又耗油"input_text = "这个车我开了好几年，还是不错的"label = {1: "正面情绪", 0: "负面情绪"}model = torch.load('model.pth')# 预处理输入数据input_data = preprocess_text(input_text)# 确保输入词向量与模型维度和数据类型相同input_data=[[text_to_vector(input_data)]]input_arry= np.array(input_data, dtype=np.float32)input_tensor = torch.Tensor(input_arry)# 将输入数据传入模型with torch.no_grad():output = model(input_tensor)predicted_class = label[torch.argmax(output).item()]print(f"predicted_text:{input_text}")print(f"模型预测的类别: {predicted_class}")

 1.测试结果：

2.测试结果：

6.完整代码展示：

1.data_set.py

import pandas as pd
import jieba# 数据读取
def load_tsv(file_path):data = pd.read_csv(file_path, sep='\t')data_x = data.iloc[:, -1]data_y = data.iloc[:, 1]return data_x, data_ywith open('./hit_stopwords.txt','r',encoding='UTF8') as f:stop_words=[word.strip() for word in f.readlines()]print('Successfully')
def drop_stopword(datas):for data in datas:for word in data:if word in stop_words:data.remove(word)return datasdef save_data(datax,path):with open(path, 'w', encoding="UTF8") as f:for lines in datax:for i, line in enumerate(lines):f.write(str(line))# 如果不是最后一行，就添加一个逗号if i != len(lines) - 1:f.write(',')f.write('\n')if __name__ == '__main':train_x, train_y = load_tsv("./data/train.tsv")test_x, test_y = load_tsv("./data/test.tsv")train_x = [list(jieba.cut(x)) for x in train_x]test_x = [list(jieba.cut(x)) for x in test_x]train_x=drop_stopword(train_x)test_x=drop_stopword(test_x)save_data(train_x,'./train.txt')save_data(test_x,'./test.txt')print('Successfully')

2.mian.py

import pandas as pd
import torch
from torch import nn
import jieba
from gensim.models import Word2Vec
import numpy as np
from data_set import load_tsv
from torch.utils.data import DataLoader, TensorDataset# 数据读取
def load_txt(path):with open(path,'r',encoding='utf-8') as f:data=[[line.strip()] for line in f.readlines()]return datatrain_x=load_txt('train.txt')
test_x=load_txt('test.txt')
train=train_x+test_x
X_all=[i for x in train for i in x]_, train_y = load_tsv("./data/train.tsv")
_, test_y = load_tsv("./data/test.tsv")
# 训练Word2Vec模型
word2vec_model = Word2Vec(sentences=X_all, vector_size=100, window=5, min_count=1, workers=4)# 将文本转换为Word2Vec向量表示
def text_to_vector(text):vector = [word2vec_model.wv[word] for word in text if word in word2vec_model.wv]return sum(vector) / len(vector) if vector else [0] * word2vec_model.vector_sizeX_train_w2v = [[text_to_vector(text)] for line in train_x for text in line]
X_test_w2v = [[text_to_vector(text)] for line in test_x for text in line]# 将词向量转换为PyTorch张量
X_train_array = np.array(X_train_w2v, dtype=np.float32)
X_train_tensor = torch.Tensor(X_train_array)
X_test_array = np.array(X_test_w2v, dtype=np.float32)
X_test_tensor = torch.Tensor(X_test_array)
#使用DataLoader打包文件
train_dataset = TensorDataset(X_train_tensor, torch.LongTensor(train_y))
train_loader = DataLoader(train_dataset, batch_size=64, shuffle=True)
test_dataset = TensorDataset(X_test_tensor,torch.LongTensor(test_y))
test_loader = DataLoader(test_dataset, batch_size=64, shuffle=True)
# 定义LSTM模型
class LSTMModel(nn.Module):def __init__(self, input_size, hidden_size, output_size):super(LSTMModel, self).__init__()self.lstm = nn.LSTM(input_size, hidden_size, batch_first=True)self.fc = nn.Linear(hidden_size, output_size)def forward(self, x):lstm_out, _ = self.lstm(x)output = self.fc(lstm_out[:, -1, :])  # 取序列的最后一个输出return output# 定义模型
input_size = word2vec_model.vector_size
hidden_size = 50  # 你可以根据需要调整隐藏层大小
output_size = 2  # 输出的大小，根据你的任务而定model = LSTMModel(input_size, hidden_size, output_size)
# 定义损失函数和优化器
criterion = nn.CrossEntropyLoss()  # 交叉熵损失函数
optimizer = torch.optim.Adam(model.parameters(), lr=0.0002)if __name__ == "__main__":# 训练模型num_epochs = 10log_interval = 100  # 每隔100个批次输出一次日志loss_min=100for epoch in range(num_epochs):model.train()for batch_idx, (data, target) in enumerate(train_loader):outputs = model(data)loss = criterion(outputs, target)optimizer.zero_grad()loss.backward()optimizer.step()if batch_idx % log_interval == 0:print('Epoch [{}/{}], Batch [{}/{}], Loss: {:.4f}'.format(epoch + 1, num_epochs, batch_idx, len(train_loader), loss.item()))# 保存最佳模型if loss.item()<loss_min:loss_min=loss.item()torch.save(model, 'model.pth')# 模型评估with torch.no_grad():model.eval()correct = 0total = 0for data, target in test_loader:outputs = model(data)_, predicted = torch.max(outputs.data, 1)total += target.size(0)correct += (predicted == target).sum().item()accuracy = correct / totalprint('Test Accuracy: {:.2%}'.format(accuracy))

3.test.py 

import torch
import jieba
from torch import nn
from gensim.models import Word2Vec
import numpy as npclass LSTMModel(nn.Module):def __init__(self, input_size, hidden_size, output_size):super(LSTMModel, self).__init__()self.lstm = nn.LSTM(input_size, hidden_size, batch_first=True)self.fc = nn.Linear(hidden_size, output_size)def forward(self, x):lstm_out, _ = self.lstm(x)output = self.fc(lstm_out[:, -1, :])  # 取序列的最后一个输出return output# 数据读取
def load_txt(path):with open(path,'r',encoding='utf-8') as f:data=[[line.strip()] for line in f.readlines()]return data#去停用词
def drop_stopword(datas):# 假设你有一个函数用于预处理文本数据with open('./hit_stopwords.txt', 'r', encoding='UTF8') as f:stop_words = [word.strip() for word in f.readlines()]datas=[x for x in datas if x not in stop_words]return datasdef preprocess_text(text):text=list(jieba.cut(text))text=drop_stopword(text)return text# 将文本转换为Word2Vec向量表示
def text_to_vector(text):train_x = load_txt('train.txt')test_x = load_txt('test.txt')train = train_x + test_xX_all = [i for x in train for i in x]# 训练Word2Vec模型word2vec_model = Word2Vec(sentences=X_all, vector_size=100, window=5, min_count=1, workers=4)vector = [word2vec_model.wv[word] for word in text if word in word2vec_model.wv]return sum(vector) / len(vector) if vector else [0] * word2vec_model.vector_sizeif __name__ == '__main__':input_text = "这个车完全就是垃圾,又热又耗油"# input_text = "这个车我开了好几年，还是不错的"label = {1: "正面情绪", 0: "负面情绪"}model = torch.load('model.pth')# 预处理输入数据input_data = preprocess_text(input_text)# 确保输入词向量与模型维度和数据类型相同input_data=[[text_to_vector(input_data)]]input_arry= np.array(input_data, dtype=np.float32)input_tensor = torch.Tensor(input_arry)# 将输入数据传入模型with torch.no_grad():output = model(input_tensor)# 这里只一个简单的示例predicted_class = label[torch.argmax(output).item()]print(f"predicted_text:{input_text}")print(f"模型预测的类别: {predicted_class}")