Update app.py

app.py

@@ -482,7 +482,7 @@ class TeachingAssistant:
         self.context_history = []
         self.max_context_length = 5  # Keep last 5 exchanges for context
     
-    def generate_response(self, message: str, history: List[Tuple[str, str]]) -> str:
+    def generate_response(self, message: str, history: List[List[Union[str, None]]]) -> str:
         """Generate personalized response based on student profile and context."""
         try:
             # Load profile (simplified - in real app would handle multiple profiles)
@@ -517,13 +517,15 @@ class TeachingAssistant:
             print(f"Error generating response: {str(e)}")
             return "I encountered an error processing your request. Please try again."
     
-    def _update_context(self, message: str, history: List[Tuple[str, str]]) -> None:
+    def _update_context(self, message: str, history: List[List[Union[str, None]]]) -> None:
         """Maintain conversation context."""
-        self.context_history.append(("user", message))
+        self.context_history.append({"role": "user", "content": message})
         if history:
             for h in history[-self.max_context_length:]:
-                self.context_history.append(("user", h[0]))
-                self.context_history.append(("assistant", h[1]))
+                if h[0]:  # User message
+                    self.context_history.append({"role": "user", "content": h[0]})
+                if h[1]:  # Assistant message
+                    self.context_history.append({"role": "assistant", "content": h[1]})
         
         # Trim to maintain max context length
         self.context_history = self.context_history[-(self.max_context_length*2):]
@@ -765,10 +767,6 @@ def create_interface():
             with gr.Column(scale=1):
                 step5 = gr.Button("5. AI Assistant")
         
-        # Tab navigation logic
-        def navigate_to_tab(tab_index):
-            return {tab: gr.update(visible=(i == tab_index)) for i, tab in enumerate(tabs)}
-        
         # Main tabs
         with gr.Tabs() as tabs:
             # ===== TAB 1: Transcript Upload =====
@@ -949,26 +947,29 @@ def create_interface():
                     title=""
                 )
         
-        # Tab navigation buttons
+        # Tab navigation logic
+        def navigate_to_tab(tab_index: int):
+            return {tabs: gr.update(selected=tab_index)}
+        
         step1.click(
             fn=lambda: navigate_to_tab(0),
-            outputs={tab: tab for tab in tabs}
+            outputs={tabs: tabs}
         )
         step2.click(
             fn=lambda: navigate_to_tab(1),
-            outputs={tab: tab for tab in tabs}
+            outputs={tabs: tabs}
         )
         step3.click(
             fn=lambda: navigate_to_tab(2),
-            outputs={tab: tab for tab in tabs}
+            outputs={tabs: tabs}
         )
         step4.click(
             fn=lambda: navigate_to_tab(3),
-            outputs={tab: tab for tab in tabs}
+            outputs={tabs: tabs}
         )
         step5.click(
             fn=lambda: navigate_to_tab(4),
-            outputs={tab: tab for tab in tabs}
+            outputs={tabs: tabs}
         )
     
     return app