Unable to import torchvision. IO. Read_image

Running the official websitepytorch案例的时候,发现无法从torchvision.io中导入read_image.

ImportError: cannot import name 'read_image' from 'torchvision.io'

查看torchvision的版本发现是0.6backward version.

In [1]: import torchvision as tv

In [2]: tv.__version__
Out[2]: '0.6.0'

升级torchvision版本即可,使用pip进行升级.

pip install --upgrade torchvision

However, it is found that there is a problem of abnormal access permissions.

ERROR: Could not install packages due to an OSError: [WinError 5] 拒绝访问.: 'c:\\users\\zhang\\appdata\\local\\programs\\python\\python37\\lib\\site-packages\\~orch\\lib\\asmjit.dll'
Consider using the `--user` option or check the permissions.

Added when upgrading–user选项即可.

pip install --user --upgrade torchvison

检查版本号,发现升级成功.

In [1]: import torchvision as tv

In [2]: tv.__version__
Out[2]: '0.10.0+cpu'

In [3]: tv.io.read_image
Out[3]: <function torchvision.io.image.read_image(path: str, mode: torchvision.io.image.ImageReadMode = <ImageReadMode.UNCHANGED: 0>) -> torch.Tensor>

不过这样还是不行,因为升级到了cpu版本,cuda不能调用了.Simply uninstalledtorch,重新安装了一遍.

pip3 install torch==1.9.0+cu111 torchvision==0.10.0+cu111 torchaudio===0.9.0 -f https://download.pytorch.org/whl/torch_stable.html

这下就没问题了.

In [1]: import torch

In [2]: torch.__version__
Out[2]: '1.9.0+cu111'

In [3]: torch.cuda.is_available()
Out[3]: True

In [4]: import torchvision as tv

In [5]: tv.__version__
Out[5]: '0.10.0+cu111'