Python torch.tril方法代碼示例

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def __init__(self, nx, n_ctx, cfg, scale=False):
        super(Attention, self).__init__()
        n_state = nx  # in Attention: n_state=768 (nx=n_embd)

        assert n_state % cfg.nH == 0
        self.register_buffer('b', torch.tril(torch.ones(
            n_ctx, n_ctx)).view(1, 1, n_ctx, n_ctx))
        self.n_head = cfg.nH
        self.split_size = n_state
        self.scale = scale
        self.c_attn = Conv1D(n_state * 3, 1, nx)
        self.c_proj = Conv1D(n_state, 1, nx)
        self.attn_dropout = nn.Dropout(cfg.adpt)
        self.resid_dropout = nn.Dropout(cfg.rdpt)

    # dimensions of w: (batch_size x num_heads x seq_length x seq_length) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def select_merge_data(self, u_feas, label, label_to_images,  ratio_n,  dists):
        dists.add_(torch.tril(100000 * torch.ones(len(u_feas), len(u_feas))))#blocking the triangle

        cnt = torch.FloatTensor([len(label_to_images[label[idx]]) for idx in range(len(u_feas))])
        dists += ratio_n * (cnt.view(1, len(cnt)) + cnt.view(len(cnt), 1))  # dist += |A|+|B|
        
        for idx in range(len(u_feas)):
            for j in range(idx + 1, len(u_feas)):
                if label[idx] == label[j]:
                    dists[idx, j] = 100000                  # set the distance within the same cluster

        dists = dists.numpy()
        ind = np.unravel_index(np.argsort(dists, axis=None), dists.shape)          # with axis=None all numbers are sorted and unravel_index transforms the sorted index into ind for each dimension
        idx1 = ind[0]          # the first dimension index
        idx2 = ind[1]           # the second dimension index
        return idx1, idx2 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def select_merge_data_v2(self, u_feas, labels, linkages):
        linkages+=(np.tril(100000 * np.ones((len(u_feas), len(u_feas)))))  # blocking the triangle

        print('Linkage adding')
        for idx in range(len(u_feas)):
            for j in range(idx + 1, len(u_feas)):
                if labels[idx] == labels[j]:
                    linkages[idx, j] = 100000  # set the distance within the same cluster

        ind = np.unravel_index(np.argsort(linkages, axis=None),
                               linkages.shape)  # with axis=None all numbers are sorted and unravel_index transforms the sorted index into ind for each dimension
        idx1 = ind[0]  # the first cluster index
        idx2 = ind[1]  # the second cluster index
        print('Linkage add finished')
        return idx1, idx2


        #after 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def select_merge_data(self, u_feas, label, label_to_images,  ratio_n,  dists):
        dists.add_(torch.tril(100000 * torch.ones(len(u_feas), len(u_feas))))

        cnt = torch.FloatTensor([len(label_to_images[label[idx]]) for idx in range(len(u_feas))])
        dists += ratio_n * (cnt.view(1, len(cnt)) + cnt.view(len(cnt), 1))  
        
        for idx in range(len(u_feas)):
            for j in range(idx + 1, len(u_feas)):
                if label[idx] == label[j]:
                    dists[idx, j] = 100000                 

        dists = dists.numpy()
        ind = np.unravel_index(np.argsort(dists, axis=None), dists.shape)          
        idx1 = ind[0]          
        idx2 = ind[1]          
        return idx1, idx2 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def __init__(self,
                 nx: int,
                 n_ctx: int,
                 config: TransformerConfig,
                 scale: bool = False) -> None:
        super().__init__()
        n_state = nx  # in Attention: n_state=768 (nx=n_embd)
        # [switch nx => n_state from Block to Attention to keep identical to TF implem]
        assert n_state % config.num_heads == 0
        self.register_buffer('b', torch.tril(torch.ones(n_ctx, n_ctx)).view(1, 1, n_ctx, n_ctx))
        self.n_head = config.num_heads
        self.split_size = n_state
        self.scale = scale
        self.c_attn = Conv1D(n_state * 3, 1, nx)
        self.c_proj = Conv1D(n_state, 1, nx)
        self.attn_dropout = torch.nn.Dropout(config.attention_dropout_probability)
        self.resid_dropout = torch.nn.Dropout(config.residual_dropout_probability) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def __init__(self, num_inputs):
        super(LUInvertibleMM, self).__init__()
        self.W = torch.Tensor(num_inputs, num_inputs)
        nn.init.orthogonal_(self.W)
        self.L_mask = torch.tril(torch.ones(self.W.size()), -1)
        self.U_mask = self.L_mask.t().clone()

        P, L, U = sp.linalg.lu(self.W.numpy())
        self.P = torch.from_numpy(P)
        self.L = nn.Parameter(torch.from_numpy(L))
        self.U = nn.Parameter(torch.from_numpy(U))

        S = np.diag(U)
        sign_S = np.sign(S)
        log_S = np.log(abs(S))
        self.sign_S = torch.from_numpy(sign_S)
        self.log_S = nn.Parameter(torch.from_numpy(log_S))

        self.I = torch.eye(self.L.size(0)) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def cumulative_average_mask(self, batch_size, inputs_len):
        """
        Builds the mask to compute the cumulative average as described in
        https://arxiv.org/abs/1805.00631 -- Figure 3

        Args:
            batch_size (int): batch size
            inputs_len (int): length of the inputs

        Returns:
            (`FloatTensor`):

            * A Tensor of shape `[batch_size x input_len x input_len]`
        """

        triangle = torch.tril(torch.ones(inputs_len, inputs_len))
        weights = torch.ones(1, inputs_len) / torch.arange(
            1, inputs_len + 1, dtype=torch.float)
        mask = triangle * weights.transpose(0, 1)

        return mask.unsqueeze(0).expand(batch_size, inputs_len, inputs_len) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def apply_masks(scores, batch_size, unseen_mask, src_lengths):
    seq_len = scores.shape[-1]

    # [1, seq_len, seq_len]
    sequence_mask = torch.ones(seq_len, seq_len).unsqueeze(0).int()
    if unseen_mask:
        # [1, seq_len, seq_len]
        sequence_mask = (
            torch.tril(torch.ones(seq_len, seq_len), diagonal=0).unsqueeze(0).int()
        )

    if src_lengths is not None:
        # [batch_size, 1, seq_len]
        src_lengths_mask = create_src_lengths_mask(
            batch_size=batch_size, src_lengths=src_lengths
        ).unsqueeze(-2)

        # [batch_size, seq_len, seq_len]
        sequence_mask = sequence_mask & src_lengths_mask

    # [batch_size, 1, seq_len, seq_len]
    sequence_mask = sequence_mask.unsqueeze(1)

    scores = scores.masked_fill(sequence_mask == 0, -np.inf)
    return scores 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def buffered_future_mask(self, tensor):
        """attend all surounding words except itself
           [[0, -inf, 0]
            [0,  0, -inf]
            [0,  0,   0]]
        The attention map is not ture diagonal since we predict y_{t+1} at time-step t
        """
        dim = tensor.size(0)
        if (
            not hasattr(self, "_future_mask")
            or self._future_mask is None
            or self._future_mask.device != tensor.device
        ):
            self._future_mask = torch.triu(
                utils.fill_with_neg_inf(tensor.new(dim, dim)), 1
            )
            self._future_mask = torch.tril(self._future_mask, 1)
        if self._future_mask.size(0) < dim:
            self._future_mask = torch.triu(
                utils.fill_with_neg_inf(self._future_mask.resize_(dim, dim)), 1
            )
            self._future_mask = torch.tril(self._future_mask, 1)
        return self._future_mask[:dim, :dim] 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def __init__(self, nx, n_ctx, config, scale=False):
        super(Attention, self).__init__()

        n_state = nx  # in Attention: n_state=768 (nx=n_embd)
        # [switch nx => n_state from Block to Attention to keep identical to TF implem]
        assert n_state % config.n_head == 0
        self.register_buffer("bias", torch.tril(torch.ones(n_ctx, n_ctx)).view(1, 1, n_ctx, n_ctx))
        self.n_head = config.n_head
        self.split_size = n_state
        self.scale = scale

        self.c_attn = Conv1D(n_state * 3, nx)
        self.c_proj = Conv1D(n_state, nx)
        self.attn_dropout = nn.Dropout(config.attn_pdrop)
        self.resid_dropout = nn.Dropout(config.resid_pdrop)
        self.pruned_heads = set() 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def __init__(self, nx, n_ctx, config, scale=False):
        super(Attention, self).__init__()
        n_state = nx  # in Attention: n_state=768 (nx=n_embd)
        # [switch nx => n_state from Block to Attention to keep identical to TF implem]
        assert n_state % config.n_head == 0
        self.register_buffer("bias", torch.tril(torch.ones(n_ctx, n_ctx)).view(1, 1, n_ctx, n_ctx))
        self.n_head = config.n_head
        self.split_size = n_state
        self.scale = scale

        self.output_attentions = config.output_attentions

        self.c_attn = Conv1D(n_state * 3, nx)
        self.c_proj = Conv1D(n_state, nx)
        self.attn_dropout = nn.Dropout(config.attn_pdrop)
        self.resid_dropout = nn.Dropout(config.resid_pdrop) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def __init__(self, nx, n_ctx, config, scale=False):
        super(Attention, self).__init__()
        self.output_attentions = config.output_attentions

        n_state = nx  # in Attention: n_state=768 (nx=n_embd)
        # [switch nx => n_state from Block to Attention to keep identical to TF implem]
        assert n_state % config.n_head == 0
        self.register_buffer("bias", torch.tril(torch.ones(n_ctx, n_ctx)).view(1, 1, n_ctx, n_ctx))
        self.n_head = config.n_head
        self.split_size = n_state
        self.scale = scale

        self.c_attn = Conv1D(n_state * 3, nx)
        self.c_proj = Conv1D(n_state, nx)
        self.attn_dropout = nn.Dropout(config.attn_pdrop)
        self.resid_dropout = nn.Dropout(config.resid_pdrop) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def __init__(self, height, width, nb_channel, nb_head, scale=False):
        super(RelationalMHDPA, self).__init__()
        # [switch nx => n_state from Block to Attention to keep identical to TF implem]
        assert nb_channel % nb_head == 0
        seq_len = height * width
        self.register_buffer(
            "b",
            torch.tril(torch.ones(seq_len, seq_len)).view(
                1, 1, seq_len, seq_len
            ),
        )
        self.nb_head = nb_head
        self.split_size = nb_channel
        self.scale = scale
        self.projection = nn.Linear(nb_channel, nb_channel * 3)
        self.mlp = nn.Linear(nb_channel, nb_channel) 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def __init__(self, nx, n_ctx, config, scale=False):
        super().__init__()
        self.output_attentions = config.output_attentions

        n_state = nx  # in Attention: n_state=768 (nx=n_embd)
        # [switch nx => n_state from Block to Attention to keep identical to TF implem]
        assert n_state % config.n_head == 0
        self.register_buffer(
            "bias", torch.tril(torch.ones((n_ctx, n_ctx), dtype=torch.uint8)).view(1, 1, n_ctx, n_ctx)
        )
        self.register_buffer("masked_bias", torch.tensor(-1e4))
        self.n_head = config.n_head
        self.split_size = n_state
        self.scale = scale

        self.c_attn = Conv1D(n_state * 3, nx)
        self.c_proj = Conv1D(n_state, nx)
        self.attn_dropout = nn.Dropout(config.attn_pdrop)
        self.resid_dropout = nn.Dropout(config.resid_pdrop)
        self.pruned_heads = set() 

# 需要導入模塊: import torch [as 別名]
# 或者: from torch import tril [as 別名]
def __init__(self,
                 nx: int,
                 n_ctx: int,
                 config: TransformerConfig,
                 scale: bool = False) -> None:
        super().__init__()
        self.nx = nx
        n_state = nx  # in Attention: n_state=768 (nx=n_embd)
        # [switch nx => n_state from Block to Attention to keep identical to TF implem]
        assert n_state % config.num_heads == 0
        self.register_buffer('b', torch.tril(torch.ones(n_ctx, n_ctx)).view(1, 1, n_ctx, n_ctx))
        self.n_head = config.num_heads
        self.split_size = n_state
        self.scale = scale
        self.c_attn = Conv1D(n_state * 3, 1, nx)
        self.c_proj = Conv1D(n_state, 1, nx)
        self.attn_dropout = torch.nn.Dropout(config.attention_dropout_probability)
        self.resid_dropout = torch.nn.Dropout(config.residual_dropout_probability)