Update app.py

app.py

@@ -1,6 +1,6 @@
 from pymongo import MongoClient
 # error since Jan 2024, from langchain.embeddings.openai import OpenAIEmbeddings
-from langchain_openai import OpenAIEmbeddings
+from langchain.embeddings import OpenAIEmbeddings
 # error since Jan 2024, from langchain.vectorstores import MongoDBAtlasVectorSearch
 from langchain_community.vectorstores import MongoDBAtlasVectorSearch
 # error since Jan 2024, from langchain.document_loaders import DirectoryLoader
@@ -41,7 +41,7 @@ def query_data(query,openai_api_key,mongo_uri):
     # If it's not specified (for example like in the code below),
     # then the default OpenAI model used in LangChain is OpenAI GPT-3.5-turbo, as of August 30, 2023
     
-    llm = OpenAI(openai_api_key=openai_api_key, temperature=0)
+    llm = OpenAI(openai_api_key=openai_api_key, temperature=0, model_name='gpt-4-1106-preview')
 
 
     # Get VectorStoreRetriever: Specifically, Retriever for MongoDB VectorStore.