thing_classes=['', '', '', '', '', '', ''] is empty

[Nabil-Miri]

Hello, when I register my dataset which is in the COCO JSON format and MetadataCatalog it, i get empty classes

import json
from detectron2.data import MetadataCatalog, DatasetCatalog
from detectron2.data.datasets import register_coco_instances
register_coco_instances('train',{},'/content/SplittedData/train.json', '/content/TACO/data')
_dataset_metadata_train = MetadataCatalog.get('train')

My JSON file: https://drive.google.com/file/d/1jnDJZswSGn0TZiYlZoApj2WfERoprhwG/view?usp=share_link

##Environment:
Google COLAB

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[Prayag22]

try this to better understand your problem
print(_dataset_metadata_train)

[Nabil-Miri]

Thanks for the response. This work was last year and it was fixed by adding them manually:

from detectron2.data.catalog import Metadata
import cv2, cv2_imshow
my_metadata = Metadata()
my_metadata.set(thing_classes=['metals_and_plastics', 'other', 'non-recyclable', 'glass', 'paper', 'bio', 'unknown'])