Update app.py

app.py

@@ -43,6 +43,12 @@ def cached_vision_process(image, max_crops, num_tokens):
 
 @spaces.GPU(duration=20)
 def answer_question(image, question, max_crops, num_tokens, sample, temperature, top_k):
+    if question is None or question.strip() == "":
+        yield "Please ask a question"
+        return
+    if image is None:
+        yield "Please upload an image"
+        return
     prompt = f"""<|im_start|>user
 <image>
 {question}<|im_end|>
@@ -110,4 +116,4 @@ with gr.Blocks() as demo:
     submit.click(answer_question, [img, prompt, max_crops, num_tokens, sample, temperature, top_k], output)
     prompt.submit(answer_question, [img, prompt, max_crops, num_tokens, sample, temperature, top_k], output)
 
-demo.queue().launch()
+demo.queue().launch(debug=True)