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This issue typically occurs when you are using an older version of PyTorch that doesn't support Python 3.7. To resolve this error, you can do one of the following:

1. Upgrade PyTorch to a version that supports Python 3.7: Check the PyTorch website for the latest version and install it using "pip install torch".

2. Downgrade Python to a version that is supported by PyTorch: Check the PyTorch documentation to see which versions of Python are supported by your current version of PyTorch and install the compatible version of Python.

3. Check your environment variables: Make sure you are using the correct version of Python and PyTorch in your environment. You can check this by typing "python --version" and "pip show torch" in the terminal.