diff --git a/src/caosadvancedtools/table_importer.py b/src/caosadvancedtools/table_importer.py
index 654d28b41a8bd6fc2ad1d71b7deafa71e0ff21a0..2a5df209cb0cc03baba8a4bf229314f24c8624da 100755
--- a/src/caosadvancedtools/table_importer.py
+++ b/src/caosadvancedtools/table_importer.py
@@ -208,6 +208,7 @@ def string_in_list(val, options, ignore_case=True):
 class TableImporter():
     """Abstract base class for importing data from tables.
     """
+
     def __init__(self, converters, obligatory_columns=None, unique_keys=None,
                  datatypes=None):
         """