error for env setup:ImportError: cannot import name 'ball_query_ext' from 'mmdet3d.ops.ball_query'

[JerryX1110]

Thanks for your insightful paper and clear code repo!

Hi, I met with the ImportError: cannot import name 'ball_query_ext' from 'mmdet3d.ops.ball_query' when run the command bash tools/dist_train.sh project_cl/configs/simipu/simipu_kitti.py 1 --work_dir ./

Do you know how to solve it?

Traceback (most recent call last):
File "tools/train.py", line 16, in
from mmdet3d.apis import train_model
File "/mnt/lustre/xxh/SimIPU-main/mmdet3d/apis/init.py", line 1, in
from .inference import (convert_SyncBN, inference_detector,
File "/mnt/lustre/xxh/SimIPU-main/mmdet3d/apis/inference.py", line 10, in
from mmdet3d.core import (Box3DMode, DepthInstance3DBoxes,
File "/mnt/lustre/xxh/SimIPU-main/mmdet3d/core/init.py", line 2, in
from .bbox import * # noqa: F401, F403
File "/mnt/lustre/xxh/SimIPU-main/mmdet3d/core/bbox/init.py", line 4, in
from .iou_calculators import (AxisAlignedBboxOverlaps3D, BboxOverlaps3D,
File "/mnt/lustre/xxh/SimIPU-main/mmdet3d/core/bbox/iou_calculators/init.py", line 1, in
from .iou3d_calculator import (AxisAlignedBboxOverlaps3D, BboxOverlaps3D,
File "/mnt/lustre/xxh/SimIPU-main/mmdet3d/core/bbox/iou_calculators/iou3d_calculator.py", line 5, in
from ..structures import get_box_type
File "/mnt/lustre/xxh/SimIPU-main/mmdet3d/core/bbox/structures/init.py", line 1, in
from .base_box3d import BaseInstance3DBoxes
File "/mnt/lustre/xxh/SimIPU-main/mmdet3d/core/bbox/structures/base_box3d.py", line 5, in
from mmdet3d.ops.iou3d import iou3d_cuda
File "/mnt/lustre/xxh/SimIPU-main/mmdet3d/ops/init.py", line 5, in
from .ball_query import ball_query
File "/mnt/lustre/xxh/SimIPU-main/mmdet3d/ops/ball_query/init.py", line 1, in
from .ball_query import ball_query
File "/mnt/lustre/xxh/SimIPU-main/mmdet3d/ops/ball_query/ball_query.py", line 4, in
from . import ball_query_ext
ImportError: cannot import name 'ball_query_ext' from 'mmdet3d.ops.ball_query' (/mnt/lustre/xxh/SimIPU-main/mmdet3d/ops/ball_query/init.py)

I noticed that you once met with the same error.
open-mmlab/mmdetection3d#503 (comment)

So, I would like to ask for your help~ Hopefully you have a good solution. :)

[zhyever]

Sorry, I forget the specific solution. But why not try to build the simipu(mmdet3d) following the open-mmlab/mmdetection3d#503 (comment). It is possible that you forget to build the codes.

[JerryX1110]

I've solved the problem. Thanks~