python – Cannot create .exe with pyinstaller from .py with torchaudio (CPU): AttributeError: ‘_OpNamespace’ ‘torchaudio’ object has no attribute ‘cuda_version’

I have a .py script that uses torchaudio (without GPU) to process some sound in Windows. To distribute it, I’ve used pyinstaller to turn it into a .exe. You can reproduce the issue with this simple script:

import torchaudio


if __name__ == '__main__':
    t = torchaudio.transforms
    print("Success")

I use pyinstaller test.py to create the build with the .exe

The .py executes correctly when run from the console python test.py but the .exe fails during the import of torchaudio with the following Traceback:

Traceback (most recent call last):
  File "torch\_ops.py", line 501, in __getattr__
    op, overload_names = torch._C._jit_get_operation(qualified_op_name)
RuntimeError: No such operator torchaudio::cuda_version

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "test.py", line 1, in <module>
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "PyInstaller\loader\pyimod02_importers.py", line 499, in exec_module
  File "torchaudio\__init__.py", line 1, in <module>
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "PyInstaller\loader\pyimod02_importers.py", line 499, in exec_module
  File "torchaudio\_extension.py", line 136, in <module>
  File "torchaudio\_extension.py", line 121, in _check_cuda_version
  File "torch\_ops.py", line 505, in __getattr__
    raise AttributeError(
AttributeError: '_OpNamespace' 'torchaudio' object has no attribute 'cuda_version'
[11648] Failed to execute script 'test' due to unhandled exception!

The environment uses:

python==3.9.15
torch==1.13.0
six==1.15.0
numpy==1.22.4
scipy==1.6.0
sounddevice==0.4.5
torchaudio==0.13.0
pyinstaller==5.6.2

Note: I tried the same installing torch with cuda ending up with the same error and a build 4 times bigger.