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| # Copyright 2024 The etils Authors. | |
| # | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| """Tree types.""" | |
| from collections.abc import Callable | |
| from typing import Any, TypeVar, Union | |
| _T = TypeVar('_T') | |
| # TODO(b/202712189): Add `Any` to the `Union` | |
| # Tree can be arbitrary `chex.dataclass`, jax structure,... so has to be Any | |
| Tree = Union[_T, list['Tree'], tuple['Tree', ...], dict[str, 'Tree']] # pytype: disable=not-supported-yet | |
| LeafFn = Callable[[Any], bool] | |