Warnings during run

[kaanaksit]

I got these warnings with the version of torchkbnufft that I installed through pip3 by following:

sudo pip3 install torchkbnufft

/usr/local/lib/python3.8/dist-packages/odak-0.1.5-py3.8.egg/odak/wave/classical.py:82: UserWarning: Casting complex values to real discards the imaginary part (Triggered internally at  /pytorch/aten/src/ATen/native/Copy.cpp:162.)
  H           = torch.tensor(H).to(dtype).unsqueeze(0).unsqueeze(0)
/usr/local/lib/python3.8/dist-packages/torchkbnufft/kbnufft.py:109: UserWarning: The given NumPy array is not writeable, and PyTorch does not support non-writeable tensors. This means you can write to the underlying (supposedly non-writeable) NumPy array using the tensor. You may want to copy the array to protect its data or make it writeable before converting it to a tensor. This type of warning will be suppressed for the rest of this program. (Triggered internally at  /pytorch/torch/csrc/utils/tensor_numpy.cpp:141.)
  torch.tensor(np.imag(self.scaling_coef))
/usr/local/lib/python3.8/dist-packages/torchkbnufft/nufft/fft_functions.py:46: UserWarning: The function torch.fft is deprecated and will be removed in PyTorch 1.8. Use the new torch.fft module functions, instead, by importing torch.fft and calling torch.fft.fft or torch.fft.fftn. (Triggered internally at  /pytorch/aten/src/ATen/native/SpectralOps.cpp:567.)
  x = torch.fft(x, grid_size.numel())

[mmuckley]

Thanks for bringing this up. Did you install against PyTorch 1.7?

[kaanaksit]

That is correct.

python3
Python 3.8.6 (default, Sep 25 2020, 09:36:53) 
[GCC 10.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import torch
>>> torch.__version__
'1.7.0'

[mmuckley]

Okay thanks. I haven't had a chance yet to update the repository for PyTorch 1.7, but I do not think it will work as the new fft functions are built for the new complex number support.

[mmuckley]

After PR #11 these should all be resolved.