Update main.py

main.py

@@ -10,7 +10,7 @@ from langchain.callbacks.streaming_stdout import StreamingStdOutCallbackHandler
 from langchain.chains import LLMChain
 from langchain.prompts import ChatPromptTemplate, MessagesPlaceholder
 from langchain.schema import StrOutputParser
-from langchain.chains.conversational_retrieval.prompts import CONDENSE_QUESTION_PROMPT
+#from langchain.chains.conversational_retrieval.prompts import CONDENSE_QUESTION_PROMPT
 from langchain.chains.question_answering import load_qa_chain
 from langchain.chains.qa_with_sources import load_qa_with_sources_chain
 from langchain.vectorstores import Pinecone
@@ -138,7 +138,15 @@ async def start():
         )
     
         os.environ['ANTHROPIC_API_KEY'] = os.environ['ANTHROPIC_API_KEY']
+        from langchain_core.prompts.prompt import PromptTemplate
 
+        _template = """Given the following conversation and a follow up question, rephrase the follow up question to be a standalone question, in its original language.
+
+                    Chat History:
+                    {chat_history}
+                    Follow Up Input: {question}
+                    Standalone question:"""
+        CONDENSE_QUESTION_PROMPT = PromptTemplate.from_template(_template)
         retriever = vectorstore.as_retriever(search_type="similarity_score_threshold", search_kwargs={"score_threshold": .7, "k": 60,"filter": {'categorie': {'$eq': 'OF'}}})
         ########## Chain with streaming ##########
         message_history = ChatMessageHistory()