Some questions about the x and y coordinates!

[FightStone]

1. In calc() function which in group.py file, x and y define for this:
   x = ind % w
   y = (ind / w).long()
   ind_k = torch.stack((x, y), dim=3)
2. But in adjust() function which in group.py file, the order of x and y is:
   y, x = joint[0:2]
3. And in refine() function which in test.py file, the order of x and y is:
   y, x = keypoints[i][:2].astype(np.int32)
4. Bue in genDtByPred() function which in test.py file, order of x and y is:
   tmp["keypoints"] += [float(j[0]), float(j[1]), 1]

[FightStone]

Who can help me answer the question? and Is the code correct?？ Thanks a lot !