1# Copyright 2022 The TensorFlow Authors. All Rights Reserved. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14# ============================================================================== 15"""Utilities to test TF-TensorRT integration.""" 16 17import os 18 19from contextlib import contextmanager 20 21 22@contextmanager 23def experimental_feature_scope(feature_name): 24 """Creates a context manager to enable the given experimental feature. 25 26 This helper function creates a context manager setting up an experimental 27 feature temporarily. 28 29 Example: 30 31 ```python 32 with self._experimental_feature_scope("feature_1"): 33 do_smthg() 34 ``` 35 36 Args: 37 feature_name: Name of the feature being tested for activation. 38 """ 39 40 env_varname = "TF_TRT_EXPERIMENTAL_FEATURES" 41 env_value_bckp = os.environ.get(env_varname, default="") 42 43 exp_features = env_value_bckp.split(",") 44 os.environ[env_varname] = ",".join(list(set(exp_features + [feature_name]))) 45 46 try: 47 yield 48 finally: 49 os.environ[env_varname] = env_value_bckp 50