Update app.py

app.py

@@ -57,7 +57,7 @@ def user(text_prompt: str, chatbot: CHAT_HISTORY):
 def bot(
     files: Optional[List[str]],
     model_choice: str,
-    system_instruction: str,
+    system_instruction: Optional[str],  # Sistema de instrucciones opcional
     chatbot: CHAT_HISTORY
 ):
     if not GOOGLE_API_KEY:
@@ -71,13 +71,17 @@ def bot(
         top_p=0.9
     )
 
+    # Usar el valor por defecto para system_instruction si está vacío
+    if not system_instruction:
+        system_instruction = ""  # O puedes poner un valor predeterminado como "No system instruction provided."
+
     text_prompt = [chatbot[-1][0]] if chatbot and chatbot[-1][0] and isinstance(chatbot[-1][0], str) else []
     image_prompt = [preprocess_image(Image.open(file).convert('RGB')) for file in files] if files else []
     
     model = genai.GenerativeModel(
         model_name=model_choice,
         generation_config=generation_config,
-        system_instruction=system_instruction
+        system_instruction=system_instruction  # Usar el valor por defecto si está vacío
     )
 
     response = model.generate_content(text_prompt + image_prompt, stream=True, generation_config=generation_config)