runtime error

Downloading: "https://github.com/ultralytics/yolov5/archive/master.zip" to /home/user/.cache/torch/hub/master.zip Traceback (most recent call last): File "app.py", line 5, in <module> model = torch.hub.load('ultralytics/yolov5', 'custom', path='best.pt') File "/home/user/.local/lib/python3.8/site-packages/torch/hub.py", line 399, in load model = _load_local(repo_or_dir, model, *args, **kwargs) File "/home/user/.local/lib/python3.8/site-packages/torch/hub.py", line 428, in _load_local model = entry(*args, **kwargs) File "/home/user/.cache/torch/hub/ultralytics_yolov5_master/hubconf.py", line 83, in custom return _create(path, autoshape=autoshape, verbose=_verbose, device=device) File "/home/user/.cache/torch/hub/ultralytics_yolov5_master/hubconf.py", line 33, in _create from models.common import AutoShape, DetectMultiBackend File "/home/user/.cache/torch/hub/ultralytics_yolov5_master/models/common.py", line 28, in <module> from utils.dataloaders import exif_transpose, letterbox File "/home/user/.cache/torch/hub/ultralytics_yolov5_master/utils/dataloaders.py", line 31, in <module> from utils.augmentations import (Albumentations, augment_hsv, classify_albumentations, classify_transforms, copy_paste, File "/home/user/.cache/torch/hub/ultralytics_yolov5_master/utils/augmentations.py", line 15, in <module> from utils.general import LOGGER, check_version, colorstr, resample_segments, segment2box, xywhn2xyxy File "/home/user/.cache/torch/hub/ultralytics_yolov5_master/utils/general.py", line 38, in <module> from ultralytics.yolo.utils.checks import check_requirements ModuleNotFoundError: No module named 'ultralytics'

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