coremltools: RuntimeError: PyTorch convert function for op 'fft_rfftn' not implemented.

I have been trying to convert PyTorch model to coreml, but face some issues during the conversion of fft_rfftn and fft_irfftn operators. Could you kindly introduce me how to register these operators like this?

 File "convert.py", line 27, in <module>
    ct.ImageType(name='mask', shape=mask_input.shape)])
  File "/Users/admin/anaconda3/envs/py36/lib/python3.6/site-packages/coremltools/converters/_converters_entry.py", line 316, in convert
    **kwargs
  File "/Users/admin/anaconda3/envs/py36/lib/python3.6/site-packages/coremltools/converters/mil/converter.py", line 175, in mil_convert
    return _mil_convert(model, convert_from, convert_to, ConverterRegistry, MLModel, compute_units, **kwargs)
  File "/Users/admin/anaconda3/envs/py36/lib/python3.6/site-packages/coremltools/converters/mil/converter.py", line 207, in _mil_convert
    **kwargs
  File "/Users/admin/anaconda3/envs/py36/lib/python3.6/site-packages/coremltools/converters/mil/converter.py", line 293, in mil_convert_to_proto
    prog = frontend_converter(model, **kwargs)
  File "/Users/admin/anaconda3/envs/py36/lib/python3.6/site-packages/coremltools/converters/mil/converter.py", line 103, in __call__
    return load(*args, **kwargs)
  File "/Users/admin/anaconda3/envs/py36/lib/python3.6/site-packages/coremltools/converters/mil/frontend/torch/load.py", line 80, in load
    raise e
  File "/Users/admin/anaconda3/envs/py36/lib/python3.6/site-packages/coremltools/converters/mil/frontend/torch/load.py", line 72, in load
    prog = converter.convert()
  File "/Users/admin/anaconda3/envs/py36/lib/python3.6/site-packages/coremltools/converters/mil/frontend/torch/converter.py", line 230, in convert
    convert_nodes(self.context, self.graph)
  File "/Users/admin/anaconda3/envs/py36/lib/python3.6/site-packages/coremltools/converters/mil/frontend/torch/ops.py", line 67, in convert_nodes
    "PyTorch convert function for op '{}' not implemented.".format(node.kind)
RuntimeError: PyTorch convert function for op 'fft_rfftn' not implemented.

About this issue

Original URL
State: closed
Created 3 years ago
Reactions: 9
Comments: 29 (1 by maintainers)

Most upvoted comments

@RahulBhalley - Thanks for the suggest. I’ve created an internal issue.

TobyRoseman on Mar 28, 2022

Coremltools 6.2 includes support for PyTorch’s fft_rfftn op.

Thanks @junpeiz for adding that.

TobyRoseman on Feb 8, 2023

@hzphzp the PyTorch’s rfft2 is just a special case of rfftn (see https://pytorch.org/docs/stable/generated/torch.fft.rfft2.html), and it should be trivial to use rfftn to replace the rfft2 in your model. If you still feel it’s necessary to add rfft2, please open another issue, as this issue is for rfftn specifically.

junpeiz on Feb 13, 2023