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Fix torch to numpy conversion when on GPU #1109

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Jul 3, 2024
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Fix torch to numpy conversion when on GPU #1109

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11 changes: 8 additions & 3 deletions gymnasium/wrappers/numpy_to_torch.py
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Original file line number Diff line number Diff line change
Expand Up @@ -36,12 +36,17 @@ def torch_to_numpy(value: Any) -> Any:


@torch_to_numpy.register(numbers.Number)
@torch_to_numpy.register(torch.Tensor)
def _number_torch_to_numpy(value: numbers.Number | torch.Tensor) -> Any:
"""Convert a python number (int, float, complex) and torch.Tensor to a numpy array."""
def _number_to_numpy(value: numbers.Number) -> Any:
"""Convert a python number (int, float, complex) to a numpy array."""
return np.array(value)


@torch_to_numpy.register(torch.Tensor)
def _torch_to_numpy(value: torch.Tensor) -> Any:
"""Convert a torch.Tensor to a numpy array."""
return value.numpy(force=True)


@torch_to_numpy.register(abc.Mapping)
def _mapping_torch_to_numpy(value: Mapping[str, Any]) -> Mapping[str, Any]:
"""Converts a mapping of PyTorch Tensors into a Dictionary of Jax Array."""
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