Implement the attention mechanism with specific modifications.
Implement attention(q, k, v, causal, mask, temperature) using scaled dot-product attention. Apply causal masking and an optional boolean mask, then divide logits by temperature before softmax. Return [output, weights], where both values are nested Python lists. Round every returned floating-point value to 6 decimal places. Inputs contain one attention head, and every query has at least one permitted key.
def attention(q, k, v, causal, mask, temperature):