Built, write and read annotations in COCO format using the COCO library

coco_format_loader.py

def coco_format_loader(train_dataset_version, label_names, coco_annotations_path):
    coco_annotation = train_dataset_version.build_coco_file_locally(
            enforced_ordered_categories=label_names
        )
    annotations_dict = coco_annotation.dict()
    with open(coco_annotations_path, "w") as f:
        f.write(json.dumps(annotations_dict))
    annotations_coco = COCO(coco_annotations_path)
    return annotations_coco