Update app.py

app.py

@@ -110,7 +110,8 @@ def get_data(query: str):
 
     for doc in found_docs:
         doc.pop("id", None)
-        for k,v in doc["metadata"].items():
+        key = doc["metadata"].keys()
+        for k in key:
             if k[0] == "_":
                 doc["metadata"].pop(k)