trying to solve merge conflicts

cdplib/db_handlers/InfluxdbHandler.py

@@ -146,7 +146,7 @@ class InfluxdbHandler:
         return self.query_to_dataframe(query)
 
     def insert_dataframe(self, dataframe: pd.DataFrame,
-                         tag_columns: list = None,
+                         tag_columns: list = [],
                          batch_size: int = 10000,
                          time_precision: str = 'u'):
         """