🐛 Bug Report: ImportError — cannot import name 'cfg' from nanodet.util.config

[Nayan-git25]

Description

I’m encountering an import error when trying to run NanoDet on the latest Python (3.12) and PyTorch versions.
It seems some internal modules are still referencing the deprecated cfg variable, which was removed in recent NanoDet versions.

Error Trace
Traceback (most recent call last):
File "test_nanodet.py", line 4, in
from nanodet.model.arch import build_model
File "nanodet/model/arch/nanodet_plus.py", line 19, in
from ..head import build_head
File "nanodet/model/head/init.py", line 3, in
from .gfl_head import GFLHead
File "nanodet/model/head/gfl_head.py", line 10, in
from nanodet.util import (
File "nanodet/util/init.py", line 8, in
from .config import cfg, load_config
ImportError: cannot import name 'cfg' from 'nanodet.util.config'

Environment

OS: Ubuntu 22.04

Python: 3.12.3

PyTorch: 2.4.0

NanoDet commit: latest (as of October 2025)

Steps to Reproduce

Clone the repo:

git clone https://github.com/RangiLyu/nanodet.git
cd nanodet
pip install -r requirements.txt

Try running:

python demo/demo.py image --config config/nanodet-plus-m_416.yml --model nanodet_m_416.ckpt --path test.jpg

Observe the ImportError.

Expected Behavior

NanoDet should load configuration correctly using the updated load_config() API and not reference deprecated globals.

Suggested Fix

Remove deprecated import:

from .config import cfg, load_config

and replace with:

from .config import load_config

in nanodet/util/init.py.