Update app.py

app.py

@@ -40,7 +40,7 @@ def send_to_openai(api_key, image_file):
     # Extract words from the assistant's response
     assistant_response = response.json()['choices'][0]['message']['content']
     words = assistant_response.split('\n')
-    checkresponse_lower = words.lower()
+    checkresponse_lower = [word.lower() for word in words]
     if "leaf" in checkresponse_lower:
         payload = {
             "model": "gpt-4-vision-preview",