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from typing import List, Dict
import requests
import time
from dotenv import load_dotenv
import os
load_dotenv()
class Reranker:
def __init__(self):
self.api_key = os.getenv("API_KEY")
self.api_base = os.getenv("BASE_URL")
def rerank(self, query: str, documents: List[Dict], index_name: str, top_k: int = 5) -> List[Dict]:
"""使用SiliconFlow的rerank API重排序文档"""
headers = {
"Authorization": f"Bearer {self.api_key}",
"Content-Type": "application/json"
}
# 准备文档列表
docs = [doc['content'] for doc in documents]
response = requests.post(
f"{self.api_base}/rerank",
headers=headers,
json={
"model": "BAAI/bge-reranker-v2-m3",
"query": query,
"documents": docs,
"top_n": top_k
}
)
if response.status_code != 200:
raise Exception(f"Error in reranking: {response.text}")
# 处理结果
results = response.json()["results"]
reranked_docs = []
for result in results:
doc_index = result["index"]
original_doc = documents[doc_index].copy()
original_doc['rerank_score'] = result["relevance_score"]
original_doc['index_name'] = index_name
reranked_docs.append(original_doc)
return reranked_docs |