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@vcasellesb vcasellesb commented Jul 29, 2025

Hi! Thanks for your package, I have been using it as part of the batchgeneratorsv2 data augmentations pipeline, and I kept getting the following UserWarning:

/opt/homebrew/Caskroom/miniconda/base/envs/tm-torch/lib/python3.12/site-packages/fft_conv_pytorch/fft_conv.py:139: UserWarning: Using a non-tuple sequence for multidimensional indexing is deprecated and will be changed in pytorch 2.9; use x[tuple(seq)] instead of x[seq]. In pytorch 2.9 this will be interpreted as tensor index, x[torch.tensor(seq)], which will result either in an error or a different result (Triggered internally at /Users/runner/work/pytorch/pytorch/pytorch/torch/csrc/autograd/python_variable_indexing.cpp:312.)

I think that with the little change I've commited it should be fixed, but I haven't tested it! Although it's such a small change I don't think it can break anything.

UPDATE: I've tested it and it works same as before.

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Summary of Changes

Hello @vcasellesb, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a small but crucial change to prevent a UserWarning that arises from upcoming changes in PyTorch's multidimensional indexing behavior. The modification ensures that the crop_slices variable is a tuple, thereby maintaining compatibility and avoiding potential errors or unexpected results in future PyTorch versions.

Highlights

  • Deprecation Warning Fix: I've addressed a UserWarning from PyTorch related to multidimensional indexing. The fix involves explicitly converting the crop_slices list to a tuple before it's used for indexing, aligning with future PyTorch behavior.
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Code Review

The pull request addresses a PyTorch deprecation warning by converting crop_slices to a tuple. A suggestion has been provided to improve the efficiency of the tuple construction.

Comment on lines +135 to +140
crop_slices = tuple(
[slice(None), slice(None)] + [
slice(0, (signal_size[i] - kernel.size(i) + 1), stride_[i - 2])
for i in range(2, signal.ndim)
]
)

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medium

Converting crop_slices to a tuple resolves the deprecation warning. For improved efficiency and conciseness, consider constructing the tuple directly using tuple concatenation with a generator expression. This avoids creating intermediate lists.

crop_slices = (slice(None), slice(None)) + tuple(
    slice(0, (signal_size[i] - kernel.size(i) + 1), stride_[i - 2])
    for i in range(2, signal.ndim)
)

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