| # Copyright 2025 The Scenic 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. | |
| """Constant value and types' definitions.""" | |
| from typing import Dict, Callable, Any, Tuple, Iterable | |
| import jax.numpy as jnp | |
| PyTree = Any | |
| DType = jnp.dtype | |
| JTensor = jnp.ndarray | |
| JTensorDict = Dict[str, JTensor] | |
| Batch = Dict[str, JTensor] | |
| Shape = Iterable[int] | |
| MetricFn = Callable[[JTensor, Batch], Dict[str, Tuple[float, int]]] | |
| LossFn = Callable[[JTensorDict, Batch], Dict[str, float]] | |
| Initializer = Callable[[JTensor, Shape, DType], JTensor] | |