KeyError: 'Traceback (most recent call last):\n 
 "C:\Program 
s\Anaconda3\lib\site-packages\torch\utils\data\dataloader.py", line 138, in _worker_loop\n samples = collate_fn([dataset[i] for i in batch_indices])\n 
 "C:\Program 
s\Anaconda3\lib\site-packages\torch\utils\data\dataloader.py", line 138, in \n samples = collate_fn([dataset[i] for i in batch_indices])\n 
 "F:\pychqarmtestdemo\ssd.pytorch-master\data\voc0712.py", line 126, in getitem\n im, gt, h, w = self.pull_item(index)\n 
 "F:\pychqarmtestdemo\ssd.pytorch-master\data\voc0712.py", line 141, in pull_item\n target = self.target_transform(target, width, height)\n 
 "F:\pychqarmtestdemo\ssd.pytorch-master\data\voc0712.py", line 83, in call\n label_idx = self.class_to_ind[name]\nKeyError: 'feng'\n
feng is the lable name

Traceback (most recent call last):


 "/home/pi/AIY-projects-python/checkpoints/check_audio.py", line 158, in <module>

main()


 "/home/pi/AIY-projects-python/checkpoints/check_audio.py", line 153, in main

do_checks()


 "/home/pi/AIY-projects-python/checkpoints/check_audio.py", line 111, in do_checks

if not check_voicehat_present():


 "/home/pi/AIY-projects-python/checkpoints/check_audio.py", line 70, in check_voicehat_present

card_id = CARDS_ID[get_aiy_device_name()]
KeyError: None
