TypeError: pic should be PIL Image or ndarray. Got ＜class ‘NoneType‘＞

项目场景：

Alexnet分类任务

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问题描述

完整报错如下：

Traceback (most recent call last):
  File "alexnet_acc.py", line 48, in 
    image_input = preprocess(image_cv)
  File "/root/anaconda3/envs/torch1/lib/python3.7/site-packages/torchvision/transforms/transforms.py", line 61, in __call__
    img = t(img)
  File "/root/anaconda3/envs/torch1/lib/python3.7/site-packages/torch/nn/modules/module.py", line 1102, in _call_impl
    return forward_call(*input, **kwargs)
  File "/root/anaconda3/envs/torch1/lib/python3.7/site-packages/torchvision/transforms/transforms.py", line 304, in forward
    return F.resize(img, self.size, self.interpolation, self.max_size, self.antialias)
  File "/root/anaconda3/envs/torch1/lib/python3.7/site-packages/torchvision/transforms/functional.py", line 419, in resize
    return F_pil.resize(img, size=size, interpolation=