File: pytree_flatten.py

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# mypy: allow-untyped-defs
import torch

from torch.utils import _pytree as pytree

class PytreeFlatten(torch.nn.Module):
    """
    Pytree from PyTorch can be captured by TorchDynamo.
    """

    def forward(self, x):
        y, spec = pytree.tree_flatten(x)
        return y[0] + 1

example_args = ({1: torch.randn(3, 2), 2: torch.randn(3, 2)},),
model = PytreeFlatten()