PyTorch
-------

The PyTorch implementation follows closely the syntax and usage of the 
Python implementation, while also supporting backpropagation. 
The example shows how to compute gradients relative to the input
coordinates by using ``backward()``, and it also illustrates the computation
of second derivatives by reverse-mode autodifferentiation.
The :py:class:`sphericart.torch.SphericalHarmonics` and
:py:class:`sphericart.torch.SolidHarmonics` classes, which are derived
from ``torch.nn.Module``, can then be compiled using torchscript. 

.. literalinclude:: ../../examples/pytorch/example.py
    :language: python