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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.
"""`linalg` compat module for interoperability between tf, jax, numpy."""
from __future__ import annotations
from etils.enp import compat
from etils.enp import numpy_utils
from etils.enp.typing import FloatArray # pylint: disable=g-multiple-import
lazy = numpy_utils.lazy
def normalize(x: FloatArray['*d'], axis: int = -1) -> FloatArray['*d']:
"""Normalize the vector to the unit norm."""
return x / compat.norm(x, axis=axis, keepdims=True)
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