Error in PyTorch DataLoder

[MostafaMagdSalama]

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i got this error when i train a model (srgan)

KeyError: Caught KeyError in DataLoader worker process 0. Original Traceback (most recent call last): File "/usr/local/lib/python3.6/dist-packages/torch/utils/data/_utils/worker.py", line 178, in _worker_loop data = fetcher.fetch(index) File "/usr/local/lib/python3.6/dist-packages/torch/utils/data/_utils/fetch.py", line 44, in fetch data = [self.dataset[idx] for idx in possibly_batched_index] File "/usr/local/lib/python3.6/dist-packages/torch/utils/data/_utils/fetch.py", line 44, in data = [self.dataset[idx] for idx in possibly_batched_index] File "/content/drive/My Drive/PyTorch--master/datasets.py", line 67, in getitem img = Image.open(self.images[i], mode='r') KeyError: 0

i'm training the model in google colab thanks