# https://download.pytorch.org/models/fasterrcnn_resnet50_fpn_coco-258fb6c6.pth weights_dict = torch.load("backbone/fasterrcnn_resnet50_fpn_coco-258fb6c6.pth", map ...
from train_utils import GroupedBatchSampler, create_aspect_ratio_groups, init_distributed_mode, save_on_master, mkdir ...