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import torch
from torch import Tensor
lib = torch.library._scoped_library("python_agnostic", "FRAGMENT")
lib.define("ultra_norm(Tensor[] inputs) -> Tensor")
def ultra_norm(inputs: list[Tensor]) -> Tensor:
"""
Computes the ultra-L2-norm of a list of tensors via computing the norm of norms.
Assumes:
- inputs should not be empty
- all tensors in inputs should be on the same device and have the same dtype
Args:
inputs: list of torch.tensors
Returns:
Scalar torch.tensor of shape ()
"""
return torch.ops.python_agnostic.ultra_norm.default(inputs)
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