pytorch实现用CNN和LSTM对文本进行分类方式
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2021-01-21
17:22:04
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pytorch实现用实现用CNN和和LSTM对文本进行分类方式对文本进行分类方式
model.py：
#!/usr/bin/python
# -*- coding: utf-8 -*-
import torch
from torch import nn
import numpy as np
from torch.autograd import Variable
import torch.nn.functional as F
class TextRNN(nn.Module):
"""文本分类，RNN模型"""
def __init__(self):
super(TextRNN, self).__init__()
# 三个待输入的数据
self.embedding = nn.Embedding(5000, 64) # 进行词嵌入
# self.rnn = nn.LSTM(input_size=64, hidden_size=128, num_layers=2, bidirectional=True)
self.rnn = nn.GRU(input_size=64, hidden_size=128, num_layers=2, bidirectional=True)
self.f1 = nn.Sequential(nn.Linear(256,128),
nn.Dropout(0.8),
nn.ReLU())
self.f2 = nn.Sequential(nn.Linear(128,10),
nn.Softmax())
def forward(self, x):
x = self.embedding(x)
x,_ = self.rnn(x)
x = F.dropout(x,p=0.8)
x = self.f1(x[:,-1,:])
return self.f2(x)
class TextCNN(nn.Module):
def __init__(self):
super(TextCNN, self).__init__()
self.embedding = nn.Embedding(5000,64)
self.conv = nn.Conv1d(64,256,5)
self.f1 = nn.Sequential(nn.Linear(256*596, 128),
nn.ReLU())
self.f2 = nn.Sequential(nn.Linear(128, 10),
nn.Softmax())
def forward(self, x):
x = self.embedding(x)
x = x.detach().numpy()
x = np.transpose(x,[0,2,1])
x = torch.Tensor(x)
x = Variable(x)
x = self.conv(x)
x = x.view(-1,256*596)
x = self.f1(x)
return self.f2(x)
train.py：
# coding: utf-8
from __future__ import print_function
import torch
from torch import nn
from torch import optim
from torch.autograd import Variable
import os
import numpy as np
from model import TextRNN,TextCNN
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