import torch import torch.nn as nn import torch.nn.functional as F from torch.utils.data import Dataset, DataLoader from sklearn.metrics import accuracy_score import jieba from CLDNN2 import CLDNN from CLDNNtest import CLDNNtest # 定义超参数 MAX_LENGTH = 100 # 输入序列的最大长度 VOCAB_SIZE = 35091 # 词汇表大小 EMBEDDING_SIZE = 128 # 词向量的维度 NUM_FILTERS = 100 # 卷积核数量 FILTER_SIZES = [2, 3, 4] # 卷积核尺寸 class SentimentDataset(Dataset): def __init__(self, texts, labels): self.texts = texts self.labels = labels def __len__(self): return len(self.texts) def __getitem__(self, index): text = self.texts[index] label = self.labels[index] return text, label class CNNClassifier(nn.Module): def __init__(self, vocab_size, embedding_size, num_filters, filter_sizes, output_size, dropout): super().__init__() self.embedding = nn.Embedding(vocab_size, embedding_size) # self.convs = nn.ModuleList([ # nn.Conv2d(1, num_filters, (fs, embedding_size)) for fs in filter_sizes # ]) self.convs = nn.Sequential( nn.Conv2d(1, num_filters, (2, 2)), # nn.MaxPool2d(2), nn.ReLU(inplace=True), nn.Conv2d(num_filters, num_filters, (3, 3)), nn.ReLU(inplace=True), nn.Conv2d(num_filters, num_filters, (4, 4)), nn.MaxPool2d(2), nn.ReLU(inplace=True), nn.Dropout(dropout) ) self.fc = nn.Sequential( nn.Linear(286700, 300), nn.Linear(300, output_size) ) # self.dropout = nn.Dropout(dropout) def forward(self, text): # text: batch_size * seq_len embedded = self.embedding(text) # batch_size * seq_len * embedding_size # print(embedded.shape) embedded = embedded.unsqueeze(1) # batch_size * 1 * seq_len * embedding_size x = self.convs(embedded) print(x.shape) # print(embedded.shape) # conved = [F.relu(conv(embedded)).squeeze(3)

这段代码实现了一个使用卷积神经网络（CNN）进行文本分类的模型。具体来说，它包括数据集的定义、模型的定义和前向传播的实现。

其中，数据集的定义使用了 PyTorch 中的 Dataset 类，用于封装输入文本和对应的标签。模型的定义使用了 PyTorch 中的 nn.Module 类，包括了词嵌入层、卷积层和全连接层。前向传播的实现包括了将输入文本进行词嵌入、进行卷积操作、进行池化操作和进行最终的分类。

需要注意的是，这段代码中使用了中文分词工具 jieba 进行分词，使用了 CLDNN 和 CLDNNtest 两个自定义模块，以及一些超参数，如最大序列长度、词汇表大小、词向量维度、卷积核数量、卷积核尺寸等。

相关问题

修改一下这段代码在pycharm中的实现，import pandas as pd import numpy as np from sklearn.model_selection import train_test_split import torch import torch.nn as nn import torch.nn.functional as F import torch.optim as optim #from torchvision import datasets,transforms import torch.utils.data as data #from torch .nn:utils import weight_norm import matplotlib.pyplot as plt from sklearn.metrics import precision_score from sklearn.metrics import recall_score from sklearn.metrics import f1_score from sklearn.metrics import cohen_kappa_score data_ = pd.read_csv(open(r"C:\Users\zhangjinyue\Desktop\rice.csv"),header=None) data_ = np.array(data_).astype('float64') train_data =data_[:,:520] train_Data =np.array(train_data).astype('float64') train_labels=data_[:,520] train_labels=np.array(train_data).astype('float64') train_data,train_data,train_labels,train_labels=train_test_split(train_data,train_labels,test_size=0.33333) train_data=torch.Tensor(train_data) train_data=torch.LongTensor(train_labels) train_data=train_data.reshape(-1,1,20,26) train_data=torch.Tensor(train_data) train_data=torch.LongTensor(train_labels) train_data=train_data.reshape(-1,1,20,26) start_epoch=1 num_epoch=1 BATCH_SIZE=70 Ir=0.001 classes=('0','1','2','3','4','5') device=torch.device("cuda"if torch.cuda.is_available()else"cpu") torch.backends.cudnn.benchmark=True best_acc=0.0 train_dataset=data.TensorDataset(train_data,train_labels) test_dataset=data.TensorDataset(train_data,train_labels) train_loader=torch.utills.data.DataLoader(dtaset=train_dataset,batch_size=BATCH_SIZE,shuffle=True) test_loader=torch.utills.data.DataLoader(dtaset=train_dataset,batch_size=BATCH_SIZE,shuffle=True)

修改后的代码如下所示：

import pandas as pd
import numpy as np
from sklearn.model_selection import train_test_split
import torch
import torch.nn as nn
import torch.nn.functional as F
import torch.optim as optim
import torch.utils.data as data
import matplotlib.pyplot as plt
from sklearn.metrics import precision_score, recall_score, f1_score, cohen_kappa_score

data_ = pd.read_csv(r"C:\Users\zhangjinyue\Desktop\rice.csv", header=None)
data_ = np.array(data_).astype('float64')

train_data = data_[:, :520]
train_labels = data_[:, 520]
train_data, _, train_labels, _ = train_test_split(train_data, train_labels, test_size=0.33333)

train_data = torch.Tensor(train_data)
train_labels = torch.LongTensor(train_labels)
train_data = train_data.reshape(-1, 1, 20, 26)

start_epoch = 1
num_epoch = 1
BATCH_SIZE = 70
Ir = 0.001
classes = ('0', '1', '2', '3', '4', '5')
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
torch.backends.cudnn.benchmark = True
best_acc = 0.0

train_dataset = data.TensorDataset(train_data, train_labels)
test_dataset = data.TensorDataset(train_data, train_labels)

train_loader = torch.utils.data.DataLoader(dataset=train_dataset, batch_size=BATCH_SIZE, shuffle=True)
test_loader = torch.utils.data.DataLoader(dataset=train_dataset, batch_size=BATCH_SIZE, shuffle=True)

请注意，我做了以下修改：

1. 移除了不需要的导入语句。
2. 修复了变量名拼写错误。
3. 移除了重复的代码行。
4. 修正了 `torch.utils.data.DataLoader` 的拼写错误。
5. 修正了数据集分割时的变量名错误。

请根据你的实际需求进一步调整代码。

import val # for end-of-epoch mAP from models.experimental import attempt_load from models.yolo import Model from utils.autoanchor import check_anchors from utils.autobatch import check_train_batch_size from utils.callbacks import Callbacks from utils.dataloaders import create_dataloader from utils.downloads import attempt_download, is_url from utils.general import (LOGGER, check_amp, check_dataset, check_file, check_git_status, check_img_size, check_requirements, check_suffix, check_yaml, colorstr, get_latest_run, increment_path, init_seeds, intersect_dicts, labels_to_class_weights, labels_to_image_weights, methods, one_cycle, print_args, print_mutation, strip_optimizer, yaml_save) from utils.loggers import Loggers from utils.loggers.wandb.wandb_utils import check_wandb_resume from utils.loss import ComputeLoss from utils.metrics import fitness from utils.plots import plot_evolve, plot_labels from utils.torch_utils import (EarlyStopping, ModelEMA, de_parallel, select_device, smart_DDP, smart_optimizer, smart_resume, torch_distributed_zero_first)这个代码什么意思

这个代码是一个Python脚本，其中使用了一些自定义模块和第三方模块，主要功能包括：

- 导入自定义模块和第三方模块
- 加载YOLO模型
- 检查anchors是否合理
- 检查训练batch size是否合理
- 定义回调函数
- 创建数据加载器
- 下载模型权重
- 检查数据集是否合理
- 检查文件是否存在
- 检查Git状态
- 检查图像大小是否合理
- 检查系统配置是否满足要求
- 检查标签的类别权重
- 检查标签的图像权重
- 定义一些优化方法
- 定义一些计算损失的方法
- 定义一些评估指标
- 定义一些绘图方法
- 定义一些辅助工具方法