Update app.py

app.py

@@ -50,26 +50,31 @@ def ask(question, openai_api_key, gemini_api_key, anthropic_api_key, file_name =
         tuple: (answer, console_logs) - The answer to the question and captured console output
     """
     if not question:
-        gr.Warning("Question is required.")
-        return "", ""
+        msg = "Question is required."
+        gr.Warning(msg)
+        return None, msg
 
     if not openai_api_key:
-        gr.Warning("OpenAI API Key is required.")
-        return "", ""
+        msg = "OpenAI API Key is required."
+        gr.Warning(msg)
+        return None, msg
     
     if not gemini_api_key:
-        gr.Warning("Gemini API Key is required.")
-        return "", ""
+        msg = "Gemini API Key is required."
+        gr.Warning(msg)
+        return None, msg
 
     if not anthropic_api_key:
-        gr.Warning("Anthropic API Key is required.")
-        return "", ""
+        msg = "Anthropic API Key is required."
+        gr.Warning(msg)
+        return None, msg
 
     is_valid, err_msg = validate_input(question, openai_api_key, gemini_api_key, anthropic_api_key, file_name)
     
     if not is_valid:
-        gr.Warning(f"Invalid input: {err_msg}")
-        return "", ""
+        msg = f"Invalid input: {err_msg}"
+        gr.Warning(msg)
+        return None, msg
     
     if file_name:
         file_name = f"files/{file_name}"
@@ -94,9 +99,9 @@ def ask(question, openai_api_key, gemini_api_key, anthropic_api_key, file_name =
         
         return answer, console_logs
     except Exception as e:
-        error_msg = str(e)
-        gr.Warning(error_msg)
-        return "", f"Error: {error_msg}"
+        msg = str(e)
+        gr.Warning(msg)
+        return None, f"Error: {msg}"
 
 # Helper functions