Update app.py

app.py

@@ -12,8 +12,15 @@ from langchain.chat_models import ChatOpenAI
 from htmlTemplates import css, bot_template, user_template
 from langchain.embeddings import openai
 from langchain.embeddings.openai import OpenAIEmbeddings
+import os
+from openai import OpenAIApi # Assuming you have openai module
 
 
+
+# Retrieve API key from environment variable
+api_key = os.environ.get("OPENAI_API_KEY")
+openai_api = OpenAIApi(api_key)
+
 # creating custom template to guide llm model
 custom_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: