```python
import sciCore

seqLen = # Length of the input sequence

# Create triangular matrices used for attention masking
attnMaskMul = sciCore.triangle(DataType.FLOAT32, seqLen, seqLen, 0.0, 1.0)
attnMaskAdd = sciCore.triangle(DataType.FLOAT32, seqLen, seqLen, Double.NEGATIVE_INFINITY, 0.0)

att = # Compute attention scores for each element in the sequence

# Apply the attention mask to the attention scores
masked_att = att * attnMaskMul + attnMaskAdd
```

This Python code block creates triangular matrices for attention masking, computes attention scores (att), and applies the attention mask to the scores (masked_att) to ensure only relevant parts of the input sequence are considered.
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