Update app.py

app.py

@@ -13,7 +13,7 @@ from langchain import PromptTemplate # to format the response
 
 
 def load_pdf_and_generate_embeddings(pdf_doc, open_ai_key, relevant_pages):
-    if openai_key is not None:
+    if open_ai_key is not None:
         os.environ['OPENAI_API_KEY'] = open_ai_key
         #Load the pdf file
         loader = OnlinePDFLoader(pdf_doc.name)