After downloading this URL used by keras 78:
https://s3.amazonaws.com/deep-learning-models/image-models/imagenet_class_index.json 2.4k
you could use:
import json
class_idx = json.load("imagenet_class_index.json")
idx2label = [class_idx[str(k)][1] for k in range(len(class_idx))]

for idx in out[0].sort()[1][-10:]:
    print(idx2label[idx])

Best regards
Thomas