examples: fix unused imports and minor errors in 'widgets'

Change-Id: I0aad3aefb2f036bf4edc2d0942f007045d605e26
Reviewed-by: Adrian Herrmann <adrian.herrmann@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

15 files changed, 21 insertions, 24 deletions

diff --git a/examples/widgets/tutorials/addressbook/part2.py b/examples/widgets/tutorials/addressbook/part2.py
index ccc6139ab..89c813006 100644
--- a/examples/widgets/tutorials/addressbook/part2.py
+++ b/examples/widgets/tutorials/addressbook/part2.py
@@ -4,9 +4,9 @@
 
 import sys
 
-from PySide6.QtCore import Qt, Signal, Slot
-from PySide6.QtWidgets import (QApplication, QDialog, QGridLayout,
-                               QHBoxLayout, QLabel, QLineEdit,
+from PySide6.QtCore import Qt
+from PySide6.QtWidgets import (QApplication, QGridLayout,
+                               QLabel, QLineEdit,
                                QMessageBox, QPushButton, QTextEdit,
                                QVBoxLayout, QWidget)
 
diff --git a/examples/widgets/tutorials/addressbook/part3.py b/examples/widgets/tutorials/addressbook/part3.py
index af5babc9b..571a96a48 100644
--- a/examples/widgets/tutorials/addressbook/part3.py
+++ b/examples/widgets/tutorials/addressbook/part3.py
@@ -4,8 +4,8 @@
 
 import sys
 
-from PySide6.QtCore import Qt, Signal, Slot
-from PySide6.QtWidgets import (QApplication, QDialog, QGridLayout,
+from PySide6.QtCore import Qt, Slot
+from PySide6.QtWidgets import (QApplication, QGridLayout,
                                QHBoxLayout, QLabel, QLineEdit,
                                QMessageBox, QPushButton, QTextEdit,
                                QVBoxLayout, QWidget)
diff --git a/examples/widgets/tutorials/addressbook/part4.py b/examples/widgets/tutorials/addressbook/part4.py
index 11d65ab3c..505fe4db9 100644
--- a/examples/widgets/tutorials/addressbook/part4.py
+++ b/examples/widgets/tutorials/addressbook/part4.py
@@ -4,8 +4,8 @@
 
 import sys
 
-from PySide6.QtCore import Qt, Signal, Slot
-from PySide6.QtWidgets import (QApplication, QDialog, QGridLayout,
+from PySide6.QtCore import Qt, Slot
+from PySide6.QtWidgets import (QApplication, QGridLayout,
                                QHBoxLayout, QLabel, QLineEdit,
                                QMessageBox, QPushButton, QTextEdit,
                                QVBoxLayout, QWidget)
diff --git a/examples/widgets/tutorials/addressbook/part5.py b/examples/widgets/tutorials/addressbook/part5.py
index 41e725ce1..72245703f 100644
--- a/examples/widgets/tutorials/addressbook/part5.py
+++ b/examples/widgets/tutorials/addressbook/part5.py
@@ -2,10 +2,9 @@
 # Copyright (C) 2022 The Qt Company Ltd.
 # SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
-import pickle
 import sys
 
-from PySide6.QtCore import Qt, Signal, Slot
+from PySide6.QtCore import Qt, Slot
 from PySide6.QtWidgets import (QApplication, QDialog, QGridLayout,
                                QHBoxLayout, QLabel, QLineEdit,
                                QMessageBox, QPushButton, QTextEdit,
diff --git a/examples/widgets/tutorials/addressbook/part6.py b/examples/widgets/tutorials/addressbook/part6.py
index 095c67175..f75fbf44f 100644
--- a/examples/widgets/tutorials/addressbook/part6.py
+++ b/examples/widgets/tutorials/addressbook/part6.py
@@ -5,7 +5,7 @@
 import pickle
 import sys
 
-from PySide6.QtCore import QFile, QIODevice, QTextStream, Qt, Signal, Slot
+from PySide6.QtCore import Qt, Slot
 from PySide6.QtWidgets import (QApplication, QDialog, QFileDialog,
                                QGridLayout, QHBoxLayout, QLabel, QLineEdit,
                                QMessageBox, QPushButton, QTextEdit,
diff --git a/examples/widgets/tutorials/addressbook/part7.py b/examples/widgets/tutorials/addressbook/part7.py
index 9addc32e0..2f874f9bd 100644
--- a/examples/widgets/tutorials/addressbook/part7.py
+++ b/examples/widgets/tutorials/addressbook/part7.py
@@ -5,7 +5,7 @@
 import pickle
 import sys
 
-from PySide6.QtCore import QFile, QIODevice, QTextStream, Qt, Signal, Slot
+from PySide6.QtCore import QFile, QIODevice, QTextStream, Qt, Slot
 from PySide6.QtWidgets import (QApplication, QDialog, QFileDialog,
                                QGridLayout, QHBoxLayout, QLabel, QLineEdit,
                                QMessageBox, QPushButton, QTextEdit,
diff --git a/examples/widgets/tutorials/cannon/t10.py b/examples/widgets/tutorials/cannon/t10.py
index db080f050..c9c3fa7f6 100644
--- a/examples/widgets/tutorials/cannon/t10.py
+++ b/examples/widgets/tutorials/cannon/t10.py
@@ -6,7 +6,7 @@
 
 import sys
 
-from PySide6.QtCore import QRect, Qt, Signal, Slot
+from PySide6.QtCore import QRect, Qt, Signal, Slot, qWarning
 from PySide6.QtGui import QColor, QFont, QPainter, QPalette
 from PySide6.QtWidgets import (QApplication, QGridLayout, QLCDNumber,
                                QPushButton, QSlider, QVBoxLayout, QWidget)
diff --git a/examples/widgets/tutorials/cannon/t11.py b/examples/widgets/tutorials/cannon/t11.py
index c7a4ffbd4..997eecbd1 100644
--- a/examples/widgets/tutorials/cannon/t11.py
+++ b/examples/widgets/tutorials/cannon/t11.py
@@ -7,7 +7,7 @@
 import sys
 import math
 
-from PySide6.QtCore import QPoint, QRect, QTimer, Qt, Signal, Slot
+from PySide6.QtCore import QPoint, QRect, QTimer, Qt, Signal, Slot, qWarning
 from PySide6.QtGui import QColor, QFont, QPainter, QPalette, QRegion
 from PySide6.QtWidgets import (QApplication, QGridLayout, QHBoxLayout,
                                QLCDNumber, QPushButton, QSlider,
diff --git a/examples/widgets/tutorials/cannon/t12.py b/examples/widgets/tutorials/cannon/t12.py
index 3887bbf2e..8847b2208 100644
--- a/examples/widgets/tutorials/cannon/t12.py
+++ b/examples/widgets/tutorials/cannon/t12.py
@@ -8,7 +8,7 @@ import sys
 import math
 import random
 
-from PySide6.QtCore import QPoint, QRect, QTime, QTimer, Qt, Signal, Slot
+from PySide6.QtCore import QPoint, QRect, QTime, QTimer, Qt, Signal, Slot, qWarning
 from PySide6.QtGui import QColor, QFont, QPainter, QPalette, QRegion
 from PySide6.QtWidgets import (QApplication, QGridLayout, QHBoxLayout,
                                QLabel, QLCDNumber, QPushButton, QSlider,
diff --git a/examples/widgets/tutorials/cannon/t13.py b/examples/widgets/tutorials/cannon/t13.py
index ddd5341da..4eb45a374 100644
--- a/examples/widgets/tutorials/cannon/t13.py
+++ b/examples/widgets/tutorials/cannon/t13.py
@@ -8,8 +8,8 @@ import sys
 import math
 import random
 
-from PySide6.QtCore import (QPoint, QRect, QTime, QTimer, Qt, SIGNAL, SLOT,
-                            Signal, Slot)
+from PySide6.QtCore import (QPoint, QRect, QTime, QTimer, Qt,
+                            Signal, Slot, qWarning)
 from PySide6.QtGui import QColor, QFont, QPainter, QPalette, QRegion
 from PySide6.QtWidgets import (QApplication, QGridLayout, QHBoxLayout, QLabel,
                                QLCDNumber, QPushButton, QSizePolicy, QSlider,
diff --git a/examples/widgets/tutorials/cannon/t14.py b/examples/widgets/tutorials/cannon/t14.py
index aa0f8876b..50b1d4c9f 100644
--- a/examples/widgets/tutorials/cannon/t14.py
+++ b/examples/widgets/tutorials/cannon/t14.py
@@ -8,10 +8,10 @@ import sys
 import math
 import random
 
-from PySide6.QtCore import (QPoint, QRect, QTime, QTimer, QSize, Qt, SIGNAL,
-                            SLOT, Signal, Slot)
+from PySide6.QtCore import (QPoint, QRect, QTime, QTimer, QSize, Qt,
+                            Signal, Slot, qWarning)
 from PySide6.QtGui import (QColor, QFont, QKeySequence, QPainter, QPalette,
-                           QShortcut, QRegion)
+                           QShortcut, QRegion, QTransform)
 from PySide6.QtWidgets import (QApplication, QFrame, QGridLayout, QHBoxLayout,
                                QLabel, QLCDNumber, QPushButton, QSizePolicy,
                                QSlider, QVBoxLayout, QWidget)
diff --git a/examples/widgets/tutorials/cannon/t2.py b/examples/widgets/tutorials/cannon/t2.py
index 57326ac37..d3adba396 100644
--- a/examples/widgets/tutorials/cannon/t2.py
+++ b/examples/widgets/tutorials/cannon/t2.py
@@ -6,9 +6,8 @@
 
 import sys
 
-from PySide6.QtCore import (QPoint, QRect, QTime, QTimer, Qt)
 from PySide6.QtGui import QFont
-from PySide6.QtWidgets import (QApplication, QPushButton)
+from PySide6.QtWidgets import QApplication, QPushButton
 
 
 if __name__ == '__main__':
diff --git a/examples/widgets/tutorials/cannon/t8.py b/examples/widgets/tutorials/cannon/t8.py
index c887a36a6..b82e24a01 100644
--- a/examples/widgets/tutorials/cannon/t8.py
+++ b/examples/widgets/tutorials/cannon/t8.py
@@ -6,7 +6,7 @@
 
 import sys
 
-from PySide6.QtCore import Signal, Slot, Qt
+from PySide6.QtCore import Signal, Slot, Qt, qWarning
 from PySide6.QtGui import QColor, QFont, QPainter, QPalette
 from PySide6.QtWidgets import (QApplication, QGridLayout, QLCDNumber,
                                QPushButton, QSlider, QVBoxLayout, QWidget)
diff --git a/examples/widgets/tutorials/cannon/t9.py b/examples/widgets/tutorials/cannon/t9.py
index 2526d1573..297e98e50 100644
--- a/examples/widgets/tutorials/cannon/t9.py
+++ b/examples/widgets/tutorials/cannon/t9.py
@@ -6,7 +6,7 @@
 
 import sys
 
-from PySide6.QtCore import QRect, Qt, Signal, Slot
+from PySide6.QtCore import QRect, Qt, Signal, Slot, qWarning
 from PySide6.QtGui import QColor, QFont, QPainter, QPalette
 from PySide6.QtWidgets import (QApplication, QGridLayout, QLCDNumber,
                                QPushButton, QSlider, QVBoxLayout, QWidget)
diff --git a/examples/widgets/tutorials/modelview/6_treeview.py b/examples/widgets/tutorials/modelview/6_treeview.py
index 861f8d587..09300560c 100644
--- a/examples/widgets/tutorials/modelview/6_treeview.py
+++ b/examples/widgets/tutorials/modelview/6_treeview.py
@@ -3,7 +3,6 @@
 
 import sys
 
-from PySide6.QtCore import Qt
 from PySide6.QtGui import QStandardItem, QStandardItemModel
 from PySide6.QtWidgets import QApplication, QMainWindow, QTreeView