Update app.py

app.py

@@ -71,6 +71,7 @@ for i, doc in enumerate(chunks):
 
 """Retriever"""
 bm25_retriever = BM25Retriever.from_documents(chunks_bm25, k = 2) # 2 most similar contexts
+
 def retriever(query):
   tmp = bm25_retriever.invoke(preprocess_for_bm25(query))
   context = []
@@ -78,8 +79,9 @@ def retriever(query):
     index = doc.metadata['index']
     context.append(chunks[index])
   return context
-def extract_question(text):
-    match = re.search(r'(?<=question:)(.*?)(?=\n\n|$)', text, re.IGNORECASE | re.DOTALL)
+    
+def extract_question(text_):
+    match = re.search(r'(?<=question:)(.*?)(?=\n\n|$)', text_, re.IGNORECASE | re.DOTALL)
     return match.group(0).strip() if match else None
 """Chain"""