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sweeping.py
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sweeping.py
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# Copyright 2022 The PyGlove 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.
"""Sweeping DNA generator."""
from typing import Any
from pyglove.core.geno.base import DNA
from pyglove.core.geno.dna_generator import DNAGenerator
class Sweeping(DNAGenerator):
"""Sweeping (Grid Search) DNA generator."""
def _setup(self):
"""Setup DNA spec."""
self._last_proposed_dna = None
def _propose(self) -> DNA:
"""Propose a random DNA."""
next_dna = self.dna_spec.next_dna(self._last_proposed_dna)
if next_dna is None:
raise StopIteration()
self._last_proposed_dna = next_dna
return next_dna
def _replay(self, trial_id: int, dna: DNA, reward: Any) -> None:
"""Replay the history to recover the last proposed DNA."""
del trial_id, reward
self._last_proposed_dna = dna