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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]},
)
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