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- demo.py

import os
import sys
from contextlib import contextmanager
from pathlib import Pathimport yaml
from tqdm import tqdmFILE = Path(__file__).resolve()
ROOT = FILE.parents[3]  # YOLOv5 root directory
if str(ROOT) not in sys.path:sys.path.append(str(ROOT))  # add ROOT to PATHfrom utils.dataloaders import LoadImagesAndLabels, img2label_paths
from utils.general import LOGGER, check_dataset, check_filetry:import wandbassert hasattr(wandb, "__version__")  # verify package import not local dir
except (ImportError, AssertionError):wandb = Noneprint(os, sys, contextmanager, yaml, tqdm, LoadImagesAndLabels, img2label_paths, LOGGER, check_dataset, check_file, wandb)

执行命令：ruff check demo.py

报错如下：

demo.py:14:1: E402 Module level import not at top of file|
12 |     sys.path.append(str(ROOT))  # add ROOT to PATH
13 |
14 | from utils.dataloaders import LoadImagesAndLabels, img2label_paths| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ E402
15 | from utils.general import LOGGER, check_dataset, check_file|demo.py:15:1: E402 Module level import not at top of file|
14 | from utils.dataloaders import LoadImagesAndLabels, img2label_paths
15 | from utils.general import LOGGER, check_dataset, check_file| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ E402
16 |
17 | try:|Found 2 errors.

解决：把后面的import放到suppress里

import os
import sys
from contextlib import contextmanager, suppress
from pathlib import Pathimport yaml
from tqdm import tqdmFILE = Path(__file__).resolve()
ROOT = FILE.parents[3]  # YOLOv5 root directory
if str(ROOT) not in sys.path:sys.path.append(str(ROOT))  # add ROOT to PATHwith suppress(FutureWarning):from utils.dataloaders import LoadImagesAndLabels, img2label_pathsfrom utils.general import LOGGER, check_dataset, check_filetry:import wandbassert hasattr(wandb, "__version__")  # verify package import not local dir
except (ImportError, AssertionError):wandb = Noneprint(os, sys, contextmanager, yaml, tqdm, LoadImagesAndLabels, img2label_paths, LOGGER, check_dataset, check_file, wandb)

前后版本对比如下：