RNN模型

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#RNN模型

一、代码

import torch
import torch.nn as nn

x_input = torch.randn(2,3,10)

class RNN(nn.Module):
    def __init__(self,input_size,hidden_size,batch_first=False):
        super(RNN,self).__init__()

        self.rnn_cell = nn.RNNCell(input_size,hidden_size)
        self.batch_first = batch_first
        self.hidden_size = hidden_size

    def _initialize_hidden(self,batch_size):
        return torch.zeros((batch_size,self.hidden_size))

    def forward(self,inputs,initial_hidden=None):
        if self.batch_first:
            batch_size,seq_size,feat_size = inputs.size()
            inputs = inputs.permute(1,0,2)
        else:
            seq_size,batch_size,feat_size = inputs

        hiddens = []

        if initial_hidden is None:
            initial_hidden = self._initialize_hidden(batch_size)
            initial_hidden = initial_hidden.to(inputs.device)

        hidden_t = initial_hidden

        for t in range(seq_size):
            hidden_t = self.rnn_cell(inputs[t],hidden_t)
            hiddens.append(hidden_t)

        hiddens = torch.stack(hiddens)

        if self.batch_first:
            hiddens = hiddens.permute(1,0,2)

        return  hiddens
model = RNN(10,15,batch_first=True)
output = model(x_input)
print(output)

二、实现效果