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Showing content from https://docs.pytorch.org/docs/stable/generated/torch.tensor.html below:

torch.tensor — PyTorch 2.7 documentation

torch.tensor
torch.tensor(data, *, dtype=None, device=None, requires_grad=False, pin_memory=False) Tensor

Constructs a tensor with no autograd history (also known as a “leaf tensor”, see Autograd mechanics) by copying data.

Parameters

data (array_like) – Initial data for the tensor. Can be a list, tuple, NumPy ndarray, scalar, and other types.

Keyword Arguments
  • dtype (torch.dtype, optional) – the desired data type of returned tensor. Default: if None, infers data type from data.

  • device (torch.device, optional) – the device of the constructed tensor. If None and data is a tensor then the device of data is used. If None and data is not a tensor then the result tensor is constructed on the current device.

  • requires_grad (bool, optional) – If autograd should record operations on the returned tensor. Default: False.

  • pin_memory (bool, optional) – If set, returned tensor would be allocated in the pinned memory. Works only for CPU tensors. Default: False.

Example:

>>> torch.tensor([[0.1, 1.2], [2.2, 3.1], [4.9, 5.2]])
tensor([[ 0.1000,  1.2000],
        [ 2.2000,  3.1000],
        [ 4.9000,  5.2000]])

>>> torch.tensor([0, 1])  # Type inference on data
tensor([ 0,  1])

>>> torch.tensor([[0.11111, 0.222222, 0.3333333]],
...              dtype=torch.float64,
...              device=torch.device('cuda:0'))  # creates a double tensor on a CUDA device
tensor([[ 0.1111,  0.2222,  0.3333]], dtype=torch.float64, device='cuda:0')

>>> torch.tensor(3.14159)  # Create a zero-dimensional (scalar) tensor
tensor(3.1416)

>>> torch.tensor([])  # Create an empty tensor (of size (0,))
tensor([])

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