Update app.py

app.py

@@ -2,6 +2,7 @@ from langchain.text_splitter import CharacterTextSplitter
 from langchain.embeddings import OpenAIEmbeddings
 from langchain.vectorstores import FAISS
 from langchain.chat_models import ChatOpenAI
+from langchain_openai import AzureChatOpenAI
 from langchain.memory import ConversationBufferMemory
 from langchain.chains import ConversationChain
 from langchain.chains import ConversationalRetrievalChain
@@ -24,6 +25,7 @@ from langchain_experimental.agents.agent_toolkits.csv.base import create_csv_age
 from langchain.agents.agent_types import AgentType
 # from langchain.agents import create_csv_agent
 from langchain import OpenAI, LLMChain
+
 class ChatDocumentQA:
     def __init__(self) -> None:
         pass
@@ -112,7 +114,7 @@ class ChatDocumentQA:
         memory = ConversationBufferMemory(memory_key="chat_history", return_messages=True)
 
         # llm = ChatOpenAI(temperature=0)
-        llm=OpenAI(temperature=0)
+        llm=AzureChatOpenAI(azure_deployment = "ChatGPT")
 
         return ConversationalRetrievalChain.from_llm(llm=llm, retriever=vectorstore.as_retriever(),
                                                      condense_question_prompt=CONDENSE_QUESTION_PROMPT,