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42 lines
1.3 KiB
Python
42 lines
1.3 KiB
Python
# Copyright 2018 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import absolute_import
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from .core import pack
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from .tree_util import build_tree, process_pytree
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from .linear_util import transformation_with_aux
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from .util import unzip2, partial
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@transformation_with_aux
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def flatten_fun(in_trees, *args, **kwargs):
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py_args = map(build_tree, in_trees, args)
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ans = yield py_args
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yield process_pytree(pack, ans)
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def unflatten_fun(fun, io_tree, *py_args):
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in_trees_expected, out_tree = io_tree
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args, in_trees = unzip2(map(tree_to_jaxtuples, py_args))
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for i, (in_tree, expected) in enumerate(zip(in_trees, in_trees_expected)):
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if in_tree != expected:
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raise TypeError("Expected {}, got {}".format(expected, in_tree))
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ans = fun(*args)
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return build_tree(out_tree, ans)
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tree_to_jaxtuples = partial(process_pytree, pack)
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