[python] Align ExternalPathProvider with Java multi-strategy support.#8104
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JingsongLi merged 3 commits intoJun 4, 2026
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| value = self.options.get(CoreOptions.DATA_FILE_EXTERNAL_PATHS_WEIGHTS, default) | ||
| if not value: | ||
| return None | ||
| return [int(w.strip()) for w in value.split(",") if w.strip()] |
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Please validate the parsed weights here, matching Java CoreOptions.externalPathWeights(). Currently zero or negative weights are accepted and then WeightedExternalPathProvider builds invalid cumulative weights: for example 0,0 makes total_weight zero so every random value maps past the last cumulative entry and all files go to the last path, while 10,-5 makes the second path unreachable. Java rejects non-positive weights, so Python should raise for <= 0 too.
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Purpose
close #8103
Tests