Designing a mask for self-attention
To ensure that the decoder can learn to predict tokens, it's important to mask future tokens when modeling the input sequences. You'll build a mask in the form of a triangular matrix of True
and False
values, with False
values in the upper diagonal to exclude future tokens.
This exercise is part of the course
Transformer Models with PyTorch
Exercise instructions
- Create a Boolean matrix,
tgt_mark
to mask future tokens in the attention mechanism of the decoder body.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
seq_length= 3
# Create a Boolean matrix to mask future tokens
tgt_mask = (1 - torch.____(
torch.____(1, ____, ____), diagonal=____)
).____()
print(tgt_mask)