Update app.py

app.py

@@ -20,25 +20,17 @@ with st.sidebar:
 
     st.markdown("**BinDocs Chat App**.")
 
-        
     st.markdown("Harnessing the power of a Large Language Model and AI technology,")
-       
-
-
     st.markdown("this innovative platform redefines PDF engagement,")
 
     st.markdown("enabling dynamic conversations that bridge the gap between")
     st.markdown("human and machine intelligence.")
 
-    
-    
     add_vertical_space(3)  # Add more vertical space between text blocks
     st.write('Made with ❤️ by Anne')
-    
 
 openai_api_key = st.text_input("Enter your OpenAI API key:")
-pdf_path = "" 
-
+pdf_path = None  # Initialize pdf_path as None
 
 def load_pdf(file_path):
     pdf_reader = PdfReader(file_path)
@@ -67,7 +59,6 @@ def load_pdf(file_path):
     return VectorStore
 
 
-
 def load_chatbot(openai_api_key):
     openai_config = {
         "api_key": openai_api_key