diff --git a/tools/visualization/plotXMLAttributes.py b/tools/visualization/plotXMLAttributes.py
index 7ae127bd7abd..2b6e9a924c30 100755
--- a/tools/visualization/plotXMLAttributes.py
+++ b/tools/visualization/plotXMLAttributes.py
@@ -429,6 +429,7 @@ def retrieveValues(index, elem, attrs, values, skippedLines):
             skippedLines[a] += 1
     return skip
 
+
 def combineValues(attrs, attr2parts, values, splitX, splitY):
     needSplit = splitX or splitY
     toYield = []