ImportError: cannot import name 'build'

[Enerald]

Hi, developers of BRNet. I have installed BRNet following the getting_started.md. All prerequisites and their corresponding version are meet the requirements. (python==3.6.9 cuda==10.1 pytorch==1.5.0 torchvision==0.6.0 mmcv==1.3.14 mmdet==2.17.0 mmdet3d==0.17.0)

1. But when I run the train.py, I get error like this:

Traceback (most recent call last):
File "tools/train.py", line 212, in
main()
File "tools/train.py", line 176, in main
test_cfg=cfg.get('test_cfg'))
File "/home/BRNet/mmdetection3d/mmdet3d/models/builder.py", line 58, in build_detector
cfg, default_args=dict(train_cfg=train_cfg, test_cfg=test_cfg))
File "/home/BRNet/mmcv/mmcv/utils/registry.py", line 212, in build
return self.build_func(*args, **kwargs, registry=self)
File "/home/BRNet/mmcv/mmcv/cnn/builder.py", line 27, in build_model_from_cfg
return build_from_cfg(cfg, registry, default_args)
File "/home/BRNet/mmcv/mmcv/utils/registry.py", line 45, in build_from_cfg
f'{obj_type} is not in the {registry.name} registry')
KeyError: 'BRNet is not in the models registry'

2. And when I test the installation by "from mmdet3d.apis import init_detector, inference_detector", I get error like this:

Traceback (most recent call last):
File "", line 1, in
File "/home/BRNet/mmdet3d/apis/init.py", line 1, in
from .inference import inference_detector, init_detector, show_result_meshlab
File "/home/BRNet/mmdet3d/apis/inference.py", line 11, in
from mmdet3d.models import build_detector
File "/home/BRNet/mmdet3d/models/init.py", line 1, in
from .backbones import * # noqa: F401,F403
File "/home/BRNet/mmdet3d/models/backbones/init.py", line 3, in
from .nostem_regnet import NoStemRegNet
File "/home/BRNet/mmdet3d/models/backbones/nostem_regnet.py", line 2, in
from ..builder import BACKBONES
File "/home/BRNet/mmdet3d/models/builder.py", line 3, in
from mmdet.models.builder import (BACKBONES, DETECTORS, HEADS, LOSSES, NECKS,
ImportError: cannot import name 'build'

Thanks for your help if you know how to install BRNet to avoid these problem.

[cheng052]

You may refer to this issue.
#5
You should take care of the version of mmdet and mmdet3d, mmdet==2.10.0 and mmdet3d==0.11.0 are recommended.
Newer versions of mmdet and mmdet3d will bring some bugs due to code changes.

[Enerald]

Thank you~