Update app.py

app.py

@@ -18,10 +18,6 @@ import spaces
 import threading
 import sys
 import torch
-from llama_index.core.indices.query.query_transform.base import (
-    StepDecomposeQueryTransform,
-)
-from llama_index.core.query_engine import MultiStepQueryEngine
 
 
 head = """
@@ -161,7 +157,7 @@ def main():
             vector_store, storage_context=storage_context
         )
 
-        retriever = VectorIndexRetriever(index=index, similarity_top_k=3, vector_store_query_mode="hybrid", embed_model=embed_model, alpha=0.2)
+        retriever = VectorIndexRetriever(index=index, similarity_top_k=3, vector_store_query_mode="hybrid", embed_model=embed_model, alpha=0.5)
 
         current_collection = "BANDI_SISTEMA_PUGLIA"
         return "collezione settata"
@@ -204,7 +200,7 @@ def main():
                     vector_store, storage_context=storage_context
                 )
 
-                retriever = VectorIndexRetriever(index=index, similarity_top_k=3, vector_store_query_mode="hybrid", embed_model=embed_model, alpha=0.4)
+                retriever = VectorIndexRetriever(index=index, similarity_top_k=3, vector_store_query_mode="hybrid", embed_model=embed_model, alpha=0.5)
             else:
                 chat_engine_bandi.reset()
                 chat_engine_bandi_sistema_puglia.reset()
@@ -302,7 +298,7 @@ def main():
         index = VectorStoreIndex.from_vector_store(
             vector_store, storage_context=storage_context
         )     
-        retriever_bandi_sistema_puglia = VectorIndexRetriever(index=index, similarity_top_k=3, vector_store_query_mode="hybrid", embed_model=embed_model, alpha=0.4)
+        retriever_bandi_sistema_puglia = VectorIndexRetriever(index=index, similarity_top_k=3, vector_store_query_mode="hybrid", embed_model=embed_model, alpha=0.5)
 
         chat_engine_bandi_sistema_puglia = ContextChatEngine(retriever=retriever_bandi_sistema_puglia, 
                                                         context_template="Sei un chatbot in grado di rispondere alle domande su bandi regionali e avvisi della regione Puglia. Hai accesso ai bandi della regione Puglia. Qui sotto le informazioni di contesto recuperate. \n"
@@ -477,14 +473,10 @@ def main():
             else:
                 print("MODALITA STANDARD")
                 if(str(current_response_mode)=="tree_summarize"):
-                    step_decompose_transform = StepDecomposeQueryTransform(llm, verbose=True)
                     # define response synthesizer
                     response_synthesizer = get_response_synthesizer(streaming=True,response_mode="tree_summarize",text_qa_template=text_qa_template)
                     query_engine = None
                     query_engine = RetrieverQueryEngine(retriever=retriever, response_synthesizer=response_synthesizer)
-                    query_engine = MultiStepQueryEngine(
-                        query_engine, query_transform=step_decompose_transform
-                    )
                     stream_response = None
                     print(userMessage)
                     stream_response = query_engine.query(userMessage)