Upload app.py

app.py

@@ -28,6 +28,7 @@ class CurriculumChatbot:
         self.llm = None
         self.qa_chain = None
         self.slide_selection_chain = None
+        self.focused_qa_chain = None
         self.response_cache = {}  # Simple cache for responses
         self.fast_mode = fast_mode  # Skip LLM for faster responses
         self._process_pdfs(slides_dir)
@@ -69,6 +70,12 @@ class CurriculumChatbot:
         )
     
     def _setup_llm(self):
+        # Initialize all LLM-related attributes to None first
+        self.llm = None
+        self.qa_chain = None
+        self.slide_selection_chain = None
+        self.focused_qa_chain = None
+        
         try:
             # Use a smaller, faster model for better performance
             # Llama 3.1 8B is quite large and slow - let's use a smaller model
@@ -143,6 +150,7 @@ Answer:"""
             self.llm = None
             self.qa_chain = None
             self.slide_selection_chain = None
+            self.focused_qa_chain = None
 
     def get_pdf_page_image(self, pdf_path, page_num):
         try: