[Question]: error when use KG search , error:" float() argument must be a string or a real number, not 'NoneType'"

[anthonya0713]

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Describe your problem

    def _relation_info_from_(self, es_res, sim_thr=0.3):
        res = {}
        es_res = self.dataStore.getFields(es_res, ["content_with_weight", "_score", "from_entity_kwd", "to_entity_kwd",
                                                   "weight_int"])
        for _, ent in es_res.items():
            if float(ent["_score"]) < sim_thr:
                continue
            f, t = sorted([ent["from_entity_kwd"], ent["to_entity_kwd"]])
            if isinstance(f, list):
                f = f[0]
            if isinstance(t, list):
                t = t[0]
            res[(f, t)] = {
                "sim": float(ent["_score"]),
                "pagerank": float(ent.get("weight_int", 0)),
                "description": ent["content_with_weight"]
            }
        return res

2025-03-17 10:29:51,139 ERROR 19 float() argument must be a string or a real number, not 'NoneType'
Traceback (most recent call last):
File "/ragflow/api/apps/chunk_app.py", line 314, in retrieval_test
ck = settings.kg_retrievaler.retrieval(question,
File "/ragflow/graphrag/search.py", line 167, in retrieval
rels_from_txt = self.get_relevant_relations_by_txt(qst, filters, idxnms, kb_ids, emb_mdl, rel_sim_threshold)
File "/ragflow/graphrag/search.py", line 125, in get_relevant_relations_by_txt
return self.relation_info_from(es_res, sim_thr)
File "/ragflow/graphrag/search.py", line 91, in relation_info_from
if float(ent["_score"]) < sim_thr:
TypeError: float() argument must be a string or a real number, not 'NoneType'