s3dis array concatenate

[ILOVEppt]

Hi,here is a problem!
multiprocessing.pool.RemoteTraceback:
"""
Traceback (most recent call last):
File "/home/jsjlab/anaconda3/envs/pcr/lib/python3.8/multiprocessing/pool.py", line 125, in worker
result = (True, func(*args, **kwds))
File "/home/jsjlab/anaconda3/envs/pcr/lib/python3.8/multiprocessing/pool.py", line 51, in starmapstar
return list(itertools.starmap(args[0], args[1]))
File "pcr/datasets/preprocessing/s3dis/preprocess_s3dis.py", line 60, in parse_room
room_coords = np.ascontiguousarray(np.vstack(room_coords))
File "<array_function internals>", line 5, in vstack
File "/home/jsjlab/anaconda3/envs/pcr/lib/python3.8/site-packages/numpy/core/shape_base.py", line 283, in vstack
return _nx.concatenate(arrs, 0)
File "<array_function internals>", line 5, in concatenate
ValueError: need at least one array to concatenate
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "pcr/datasets/preprocessing/s3dis/preprocess_s3dis.py", line 116, in
main_process()
File "pcr/datasets/preprocessing/s3dis/preprocess_s3dis.py", line 109, in main_process
pool.starmap(parse_room, [(room, opt.dataset_root, opt.output_root, opt.parse_normals)
File "/home/jsjlab/anaconda3/envs/pcr/lib/python3.8/multiprocessing/pool.py", line 372, in starmap
return self._map_async(func, iterable, starmapstar, chunksize).get()
File "/home/jsjlab/anaconda3/envs/pcr/lib/python3.8/multiprocessing/pool.py", line 771, in get
raise self._value
ValueError: need at least one array to concatenate

Can you help me?Thank you!

[baby-penguin]

There maybe some files like ._celing_1.txt in your dataset, in preprocess.py, use if ((room_name != ".DS_Store" and not room_name.startswith(".") ) and ".txt" not in room_name)]