pytorch

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# Copyright (c) Facebook, Inc. and its affiliates.
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# All rights reserved.
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#
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# This source code is licensed under the BSD-style license found in the
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# LICENSE file in the root directory of this source tree.
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from functorch._C import dim
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tree_flatten = dim.tree_flatten
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def tree_map(fn, tree):
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    vs, unflatten = tree_flatten(tree)
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    return unflatten(fn(v) for v in vs)
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