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fix: use _sample_inspirations in sample_from_island for consistent inspiration selection #456

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fix: use _sample_inspirations in sample_from_island for consistent inspiration selection #456

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14 changes: 2 additions & 12 deletions openevolve/database.py
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Original file line number Diff line number Diff line change
Expand Up @@ -447,21 +447,11 @@ def sample_from_island(
parent = self._sample_from_island_weighted(island_id)
sampling_mode = "weighted"

# Select inspirations from the same island
# Select inspirations from the same island using the same strategy as sample()
if num_inspirations is None:
num_inspirations = 5 # Default for backward compatibility

# Get other programs from the island for inspirations
other_programs = [pid for pid in island_programs if pid != parent.id]

if len(other_programs) < num_inspirations:
# Not enough programs in island, use what we have
inspiration_ids = other_programs
else:
# Sample inspirations
inspiration_ids = random.sample(other_programs, num_inspirations)

inspirations = [self.programs[pid] for pid in inspiration_ids if pid in self.programs]
inspirations = self._sample_inspirations(parent, n=num_inspirations)

logger.debug(
f"Sampled parent {parent.id} and {len(inspirations)} inspirations from island {island_id} "
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