diff --git a/influxdb_api.py b/influxdb_api.py
index 21f891a..edebbf4 100644
--- a/influxdb_api.py
+++ b/influxdb_api.py
@@ -1375,7 +1375,7 @@ def query_tags(bucket: str, measurement: str, client: InfluxDBClient=client) ->
         for record in table.records:
             tag_keys.append(record.get_value())
 
-    tag_keys
+    return tag_keys
 
 # 示例调用
 if __name__ == "__main__":