diff --git a/n2vc/loggable.py b/n2vc/loggable.py
index b3b98da..d588a1d 100644
--- a/n2vc/loggable.py
+++ b/n2vc/loggable.py
@@ -115,7 +115,7 @@
         if not include_path:
             i = filename.rfind("/")
             if i > 0:
-                filename = filename[i + 1:]
+                filename = filename[i + 1 :]
 
         # datetime
         dt = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S.%f")