From 762f66b146b676aaa3b7f1dfcc3d65118976822f Mon Sep 17 00:00:00 2001
From: Poruri Sai Rahul <rporuri@enthought.com>
Date: Wed, 7 Jul 2021 15:39:32 +0000
Subject: [PATCH] Add missing calls to super class "__init__"s (#1693)

* FIX : Add missing call to __init__ in super class

* FIX : Add missing call to __init__ in super class

* FIX : Add missing call to __init__ in super class

* FIX : Add missing call to super __init__

and fix a flake8 error

	modified:   traitsui/editors/array_editor.py
	modified:   traitsui/qt4/ui_panel.py

* DEV : Undo change in qt4 GroupEditor

see #1674

	modified:   traitsui/qt4/ui_panel.py

* CLN : Pass args to __init__ call

Previously, we were setting traits/attributes before calling __init__ on
the objects, which setup the traits machinery. Instead, this commit
passes the arguments to __init__, which feels like the right thing to do

	modified:   traitsui/editors/array_editor.py
	modified:   traitsui/editors/tuple_editor.py
	modified:   traitsui/qt4/ui_panel.py
---
 traitsui/editors/array_editor.py | 3 +--
 traitsui/editors/tuple_editor.py | 5 ++---
 traitsui/qt4/ui_panel.py         | 3 ++-
 3 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/traitsui/editors/array_editor.py b/traitsui/editors/array_editor.py
index e1f12a854..bb9f6235d 100644
--- a/traitsui/editors/array_editor.py
+++ b/traitsui/editors/array_editor.py
@@ -55,8 +55,7 @@ class ArrayStructure(HasTraits):
     def __init__(self, editor):
         """ Initializes the object.
         """
-        # Save the reference to the editor:
-        self.editor = editor
+        super().__init__(editor=editor)
 
         # Set up the field width for each item:
         width = editor.factory.width
diff --git a/traitsui/editors/tuple_editor.py b/traitsui/editors/tuple_editor.py
index 862ce95ac..a07d2d86a 100644
--- a/traitsui/editors/tuple_editor.py
+++ b/traitsui/editors/tuple_editor.py
@@ -113,15 +113,14 @@ class TupleStructure(HasTraits):
     def __init__(self, editor):
         """ Initializes the object.
         """
+        super().__init__(editor=editor)
+
         factory = editor.factory
         types = factory.types
         labels = factory.labels
         editors = factory.editors
         cols = factory.cols
 
-        # Save the reference to the editor:
-        self.editor = editor
-
         # Get the tuple we are mirroring:
         object = editor.value
 
diff --git a/traitsui/qt4/ui_panel.py b/traitsui/qt4/ui_panel.py
index f49203979..011f05ab2 100644
--- a/traitsui/qt4/ui_panel.py
+++ b/traitsui/qt4/ui_panel.py
@@ -102,7 +102,8 @@ class _Panel(BasePanel):
     def __init__(self, ui, parent, is_subpanel):
         """Initialise the object.
         """
-        self.ui = ui
+        super().__init__(ui=ui)
+
         history = ui.history
         view = ui.view