paddlenlp.layers.sequence 源代码

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[文档]def sequence_mask(seq_ids, valid_lengths): """ To boost the performance, this sequence_mask is different with paddle.fluid.layers.sequence_mask Args: seq_ids (Tensor): The whole sequence index, a tensor with a shape of [batch_size, sequence_length]. valid_lengths (Tensor): The valid length of every sequence, a tensor with a shape of [batch_size]. Returns: Tensor: Returns the output sequence mask `mask`. Its dtype is `bool` and has a shape of [batch_size, sequence_length]. """ lengths_exp = valid_lengths.unsqueeze(1) mask = seq_ids < lengths_exp return mask