def __init__(self, input_features=16, hidden_features=512, output_features=16)中的__init__是什么意思

__init__是一个Python类的构造方法，即初始化方法。该方法会在创建新对象时自动调用，并且用来为对象的属性赋初值，以满足对象的需要。在这个例子中，input_features、hidden_features和output_features是构造方法的参数，用于初始化对象的属性。

相关问题

这段代码哪里错了 class my_BiGRU(torch.nn.Module): def __init__(self, input_size, hidden_size, num_layers, output_size, gru_dropout): super(my_BiGRU, self).__init__() self.input_size = input_size self.hidden_size = hidden_size self.num_layers = num_layers self.output_size = output_size self.gru_dropout = gru_dropout self.gru = torch.nn.GRU(input_size, hidden_size, num_layers=num_layers, batch_first=True, bidirectional=True) self.fc = torch.nn.Linear(hidden_size * 2, output_size) def _setup_BiGRU_layers(self): self.BiGRU_layers = my_BiGRU(input_size=self.args.capsule_out_dim, output_size=self.args.apsule_out_features, hidden_size=self.args.BiGRU_hiddensize, num_layers=self.args.BiGRU_layers, gru_dropout=self.args.BiGRU_dropout, )

这段代码存在两个问题：

1.函数 `_setup_BiGRU_layers` 中的代码应该是在类的构造函数 `__init__` 中进行初始化，而不是在另外一个函数中进行初始化。

2.在调用 `my_BiGRU` 类时，参数名称有误，应该将 `apsule_out_features` 改为 `capsule_out_features`。

改正后的代码如下所示：

class my_BiGRU(torch.nn.Module):
    def __init__(self, input_size, hidden_size, num_layers, output_size, gru_dropout, capsule_out_features):
        super(my_BiGRU, self).__init__()
        self.input_size = input_size
        self.hidden_size = hidden_size
        self.num_layers = num_layers
        self.output_size = output_size
        self.gru_dropout = gru_dropout
        
        self.gru = torch.nn.GRU(input_size, hidden_size, num_layers=num_layers, batch_first=True, bidirectional=True)
        self.fc = torch.nn.Linear(hidden_size * 2, output_size)
        
        self.BiGRU_layers = my_BiGRU(input_size=self.input_size,
                                     output_size=capsule_out_features,
                                     hidden_size=self.hidden_size,
                                     num_layers=self.num_layers,
                                     gru_dropout=self.gru_dropout,
                                    )

注意：这里假设 `capsule_out_dim` 和 `args` 都已经在代码中被定义好了。

请补全以下代码：class AttModel(nn.Module): def __init__(self, n_input, n_hidden, seq_len): """ n_input: 单词数量 n_hidden: hidden state维度 sequence_len: 输入文本的长度 """ super(Model, self).__init__() # 传入参数 self.hidden_dim = n_hidden self.input_size = n_input self.output_size = n_input self.n_layers = 1 # Global Attention机制需要使用RNN的最大Timestep数 #即需要计算当前timestep和多少timestep的相似度权重（Alignment Weight） self.max_length = 10 # 定义结构 # RNN层 可参考 https://pytorch.org/docs/stable/generated/torch.nn.RNN.html self.rnn = nn.RNN(self.input_size,self.hidden_dim,self.n_layers,batch_first=True) # 注意力层-用于计算score self.attn = torch.nn.Linear(in_features=, out_features=, bias=False) # 注意力层-用于已经拼接了ct和ht后的变换。 self.w_c = torch.nn.Linear(in_features=, out_features=) # 全联接层 可参考 https://pytorch.org/docs/stable/generated/torch.nn.Linear.html self.fc = nn.Linear()

class AttModel(nn.Module):
def __init__(self, n_input, n_hidden, seq_len):
"""
n_input: 单词数量
n_hidden: hidden state维度
sequence_len: 输入文本的长度
"""
super(AttModel, self).__init__() # 正确的调用父类的方法
self.n_input = n_input
self.n_hidden = n_hidden
self.seq_len = seq_len
self.linear = nn.Linear(n_hidden, n_hidden)
self.encoder = nn.Embedding(n_input, n_hidden)
self.attention = nn.Linear(n_hidden, 1)

def forward(self, x):
x = self.encoder(x)
x = x.view(-1, self.seq_len, self.n_hidden)
e = torch.tanh(self.linear(x))
a = torch.softmax(self.attention(e), dim=1)
h = torch.bmm(a.permute(0, 2, 1), x).squeeze()
return h