Hi @roses_r_red
Your code requires correction for triplet_loss1 and triplet_loss2
While calculating the A and B
A = subtract positive from margin and add closest_negative
B = subtract positive from margin and add mean_negative
You have used correctly the codes but because you have missed tuppling in these codes caused these error.
Remember the instructions mentions first to subtract (margin-positive) and then add closest negative for A and mean_negative for B
Also while recalling triplet loss1 and triplet loss2 mentions you to compute tf.maximum among 0.0 and A for triplet loss1, 0.0 and B for triplet loss2, so here the tuple placement between the 0.0 and A calculation is required.
Regards
DP