Update app.py

app.py

@@ -7,7 +7,8 @@ from langchain.vectorstores import FAISS
 from langchain.chains import ConversationalRetrievalChain
 from langchain.chat_models import ChatOpenAI
 from langchain.memory import ConversationBufferMemory
-
+import os
+openai_api_key = os.environ.get("OPENAI_API_KEY")
 
 class AdvancedPdfChatbot:
     def __init__(self, openai_api_key):
@@ -39,7 +40,7 @@ class AdvancedPdfChatbot:
         return result['answer']
 
 # Initialize the chatbot
-openai_api_key = "your-openai-api-key-here"
+
 pdf_chatbot = AdvancedPdfChatbot(openai_api_key)
 
 def upload_pdf(pdf_file):