Update handler.py

handler.py

@@ -21,7 +21,7 @@ class EndpointHandler:
     def __call__(self, data: Dict[str, Any]) -> List[Dict[str, Any]]:
         text = data.get("text", None)
         if text is not None:
-            assert isinstance(text, string), "Expected text to be a string"
+            assert isinstance(text, str), "Expected text to be a string"
             return self.query_embedder.run(text)
 
         documents = data.get("documents", None)