--- a/eric6/Debugger/CallStackViewer.py	Sat Apr 10 18:31:17 2021 +0200
+++ b/eric6/Debugger/CallStackViewer.py	Sat Apr 10 18:38:27 2021 +0200
@@ -40,7 +40,7 @@
         @param parent reference to the parent widget
         @type QWidget
         """
-        super(CallStackViewer, self).__init__(parent)
+        super().__init__(parent)
         
         self.__layout = QVBoxLayout(self)
         self.setLayout(self.__layout)