diff --git a/kagle/kagle_util.py b/kagle/kagle_util.py
index 5b8803e9f111861bbf838819aed82fdbf15b7175..de26d0569136ec0fb7cc30ef53d1519184cf14a0 100755
--- a/kagle/kagle_util.py
+++ b/kagle/kagle_util.py
@@ -36,7 +36,7 @@ def get_absolute_path(path, params):
         return path
 
 
-def make_datetime(date_str, fmt = None):
+def make_datetime(date_str, fmt=None):
     """
     create a datetime instance by date_string
     Args: