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+# Copyright (c) 2023 Cisco and/or its affiliates.
+# 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.
+
+"""Module defining TrimmedStat class."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+from .load_stats import LoadStats
+from .target_spec import TargetSpec
+
+
+@dataclass
+class TrimmedStat(LoadStats):
+ """Load stats trimmed to a single target.
+
+ Useful mainly for reporting the overall results.
+ """
+
+ def __post_init__(self) -> None:
+ """Initialize load value and check there is one target to track."""
+ super().__post_init__()
+ if len(self.target_to_stat) != 1:
+ raise ValueError(f"No single target: {self.target_to_stat!r}")
+
+ @staticmethod
+ def for_target(stats: LoadStats, target: TargetSpec) -> TrimmedStat:
+ """Return new instance with only one target in the mapping.
+
+ :param stats: The load stats instance to trim.
+ :param target: The one target which should remain in the mapping.
+ :type stats: LoadStats
+ :type target: TargetSpec
+ :return: Newly created instance.
+ :rtype: TrimmedStat
+ """
+ return TrimmedStat(
+ rounding=stats.rounding,
+ int_load=stats.int_load,
+ target_to_stat={target: stats.target_to_stat[target]},
+ )