Update app.py

app.py

@@ -32,6 +32,7 @@ from scipy.stats import spearmanr
 from functools import lru_cache
 from langchain.retrievers import MultiQueryRetriever
 from langchain_huggingface.llms import HuggingFacePipeline
+from langchain.schema import BaseRunManager, NoOpRunManager
 from transformers import pipeline
 from sklearn.model_selection import ParameterGrid
 from tqdm import tqdm