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Fix uniform symdiff to fallback to other symdiff groups when no valid candidates

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This commit is contained in:
Michael Winter 2026-03-27 10:14:33 +01:00
parent 863423ca7a
commit 7dd7f23611
1 changed files with 29 additions and 0 deletions
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29
src/pathfinder.py
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@ -68,6 +68,12 @@ class PathFinder:
chosen_symdiff = random.choice(list(edges_by_symdiff.keys())) chosen_symdiff = random.choice(list(edges_by_symdiff.keys()))
out_edges = edges_by_symdiff[chosen_symdiff] out_edges = edges_by_symdiff[chosen_symdiff]
# Use uniform weights for this symdiff group
uniform_weight = 1.0
out_edges_with_weight = [
(e[0], e[1], {**e[2], "weight": uniform_weight}) for e in out_edges
]
out_edges = out_edges_with_weight
# Build candidates using Path's state and factor methods # Build candidates using Path's state and factor methods
candidates = path_obj.get_candidates(out_edges, path_obj.output_chords) candidates = path_obj.get_candidates(out_edges, path_obj.output_chords)
@ -77,6 +83,29 @@ class PathFinder:
# Filter out candidates with zero weight # Filter out candidates with zero weight
valid_candidates = [c for c in candidates if c.weight > 0] valid_candidates = [c for c in candidates if c.weight > 0]
# If uniform_symdiff and no valid candidates, try other symdiff groups
if (
not valid_candidates
and weights_config.get("uniform_symdiff")
and edges_by_symdiff
):
remaining_symdiffs = [
s for s in edges_by_symdiff.keys() if s != chosen_symdiff
]
for fallback_symdiff in remaining_symdiffs:
out_edges = edges_by_symdiff[fallback_symdiff]
out_edges = [
(e[0], e[1], {**e[2], "weight": 1.0}) for e in out_edges
]
candidates = path_obj.get_candidates(
out_edges, path_obj.output_chords
)
path_obj.compute_weights(candidates, weights_config)
valid_candidates = [c for c in candidates if c.weight > 0]
if valid_candidates:
break
if not valid_candidates: if not valid_candidates:
break break