split函数

file_path='/media/dell/D/qcc/RandLA-Net/data/semantic_kitti/dataset/sequences_0.06/00/velodyne/001915.npy'
file_path.split('/')[-3]

结果是：

'00'

file_path='/media/dell/D/qcc/RandLA-Net/data/semantic_kitti/dataset/sequences_0.06/00/velodyne/001915.npy'
file_path.split('/')[-1]

结果是：

'001915.npy'

file_path='/media/dell/D/qcc/RandLA-Net/data/semantic_kitti/dataset/sequences_0.06/00/velodyne/001915.npy'
file_path.split('/')[-2]

结果是：

'velodyne'