from PyQt5.QtCore import QRectF rect = QRectF(0.0, 0.0, 100.0, 100.0)
from PyQt5.QtGui import QGraphicsItem class MyItem(QGraphicsItem): def __init__(self): super().__init__() def boundingRect(self): return QRectF(0.0, 0.0, 100.0, 100.0)In this code, the boundingRect method returns a QRectF object that specifies the bounding rectangle for the graphic item. The PyQt5 library provides a powerful set of tools for creating GUI applications in Python, including the QtCore module and the QRectF class.