examples: fix flake8 issues and add exceptions

Exception for:
- qApp and tr not being directly imported: F821
- *rc and qml modules being imported but not used: F401

Pick-to: 6.6 6.5 6.2
Change-Id: I5e40f3f54c1721ef3dc5d7f1e87d5fd8ec771b8e
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

4 files changed, 11 insertions, 13 deletions

diff --git a/examples/widgets/graphicsview/collidingmice/collidingmice.py b/examples/widgets/graphicsview/collidingmice/collidingmice.py
index 8165335a0..fb24db3ab 100644
--- a/examples/widgets/graphicsview/collidingmice/collidingmice.py
+++ b/examples/widgets/graphicsview/collidingmice/collidingmice.py
@@ -9,7 +9,7 @@ from PySide6.QtCore import (QLineF, QPointF, QRandomGenerator, QRectF, QTimer, Q
 from PySide6.QtGui import (QBrush, QColor, QPainter, QPainterPath, QPixmap, QPolygonF, QTransform)
 from PySide6.QtWidgets import (QApplication, QGraphicsItem, QGraphicsScene, QGraphicsView)
 
-import mice_rc
+import mice_rc  # noqa: F401
 
 
 def random(boundary):
diff --git a/examples/widgets/graphicsview/diagramscene/diagramscene.py b/examples/widgets/graphicsview/diagramscene/diagramscene.py
index a88e030f3..60e05613c 100644
--- a/examples/widgets/graphicsview/diagramscene/diagramscene.py
+++ b/examples/widgets/graphicsview/diagramscene/diagramscene.py
@@ -17,7 +17,7 @@ from PySide6.QtWidgets import (QAbstractButton, QApplication, QButtonGroup,
                                QMessageBox, QSizePolicy, QToolBox, QToolButton,
                                QWidget)
 
-import diagramscene_rc
+import diagramscene_rc  # noqa: F401
 
 
 class Arrow(QGraphicsLineItem):
@@ -326,10 +326,10 @@ class DiagramScene(QGraphicsScene):
             self.removeItem(self.line)
             self.line = None
 
-            if (len(start_items) and len(end_items) and
-                    isinstance(start_items[0], DiagramItem) and
-                    isinstance(end_items[0], DiagramItem) and
-                    start_items[0] != end_items[0]):
+            if (len(start_items) and len(end_items)
+                    and isinstance(start_items[0], DiagramItem)
+                    and isinstance(end_items[0], DiagramItem)
+                    and start_items[0] != end_items[0]):
                 start_item = start_items[0]
                 end_item = end_items[0]
                 arrow = Arrow(start_item, end_item)
diff --git a/examples/widgets/graphicsview/dragdroprobot/dragdroprobot.py b/examples/widgets/graphicsview/dragdroprobot/dragdroprobot.py
index 1896c5ab4..9ed92b26e 100644
--- a/examples/widgets/graphicsview/dragdroprobot/dragdroprobot.py
+++ b/examples/widgets/graphicsview/dragdroprobot/dragdroprobot.py
@@ -13,7 +13,7 @@ from PySide6.QtWidgets import (QApplication, QGraphicsItem,
                                QGraphicsItemAnimation, QGraphicsScene,
                                QGraphicsView)
 
-import dragdroprobot_rc
+import dragdroprobot_rc  # noqa: F401
 
 
 def random(boundary):
diff --git a/examples/widgets/graphicsview/elasticnodes/elasticnodes.py b/examples/widgets/graphicsview/elasticnodes/elasticnodes.py
index 2e0581ff3..90cb49626 100644
--- a/examples/widgets/graphicsview/elasticnodes/elasticnodes.py
+++ b/examples/widgets/graphicsview/elasticnodes/elasticnodes.py
@@ -20,8 +20,6 @@ def random(boundary):
 
 class Edge(QGraphicsItem):
 
-    item_type = QGraphicsItem.UserType + 2
-
     def __init__(self, sourceNode, destNode):
         super().__init__()
 
@@ -36,7 +34,7 @@ class Edge(QGraphicsItem):
         self.adjust()
 
     def item_type(self):
-        return Edge.item_type
+        return QGraphicsItem.UserType + 2
 
     def source_node(self):
         return self.source()
@@ -119,7 +117,6 @@ class Edge(QGraphicsItem):
 
 
 class Node(QGraphicsItem):
-    item_type = QGraphicsItem.UserType + 1
 
     def __init__(self, graphWidget):
         super().__init__()
@@ -133,7 +130,7 @@ class Node(QGraphicsItem):
         self.setZValue(-1)
 
     def item_type(self):
-        return Node.item_type
+        return QGraphicsItem.UserType + 1
 
     def add_edge(self, edge):
         self._edge_list.append(weakref.ref(edge))
@@ -376,7 +373,8 @@ class GraphWidget(QGraphicsView):
         painter.drawText(text_rect, message)
 
     def scale_view(self, scaleFactor):
-        factor = self.transform().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width()
+        factor = self.transform().scale(scaleFactor, scaleFactor).mapRect(
+            QRectF(0, 0, 1, 1)).width()
 
         if factor < 0.07 or factor > 100:
             return