Update app.py

app.py

@@ -26,7 +26,7 @@ def search_amazon(query: str, num: int = 10) -> str:
 
     links = ""
 
-    if res['items'] is None OR len(res['items']) == 0
+    if res['items'] is None or len(res['items']) == 0
         return ""
     for item in res['items']:
         links += f"- [{item['title']}]({item['link']})\n"