用pytorch写一个convlstm的代码
时间: 2024-04-29 13:19:10 浏览: 79
基于torch实现的ConvLstm.zip
好的,以下是使用PyTorch实现ConvLSTM的代码示例:
```python
import torch
import torch.nn as nn
class ConvLSTM(nn.Module):
def __init__(self, input_size, hidden_size, kernel_size, num_layers):
super(ConvLSTM, self).__init__()
self.input_size = input_size
self.hidden_size = hidden_size
self.kernel_size = kernel_size
self.num_layers = num_layers
self.conv_lstms = nn.ModuleList()
# 定义ConvLSTM层
for i in range(num_layers):
input_dim = self.input_size if i == 0 else self.hidden_size[i-1]
self.conv_lstms.append(nn.ConvLSTM2d(input_dim, self.hidden_size[i],
self.kernel_size[i], padding=1))
def forward(self, inputs):
hidden_states = [None] * self.num_layers
seq_len = inputs.size(1)
# 在时间步上循环
for t in range(seq_len):
x = inputs[:, t, :, :, :]
for i in range(self.num_layers):
# 计算ConvLSTM层的输出
if hidden_states[i] is None:
h, c = self.conv_lstms[i](x)
else:
h, c = self.conv_lstms[i](x, hidden_states[i])
x = h
hidden_states[i] = (h, c)
return x, hidden_states
```
这个示例中,我们定义了一个ConvLSTM类,它继承自PyTorch的nn.Module类。我们定义了ConvLSTM的输入大小input_size、隐藏状态大小hidden_size、卷积核大小kernel_size和层数num_layers。在ConvLSTM的构造函数中,我们使用nn.ModuleList()定义了多个ConvLSTM层,并将它们保存在conv_lstms列表中。在ConvLSTM的前向函数中,我们首先定义了一个列表hidden_states,用于存储每个时间步的隐藏状态。然后,在时间步上循环,对于每个时间步,我们将输入张量x传递给每个ConvLSTM层,计算它们的输出,并更新隐藏状态。最后,返回最后一个时间步的输出和所有时间步的隐藏状态。
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