AttributeError: 'QPointF' object has no attribute 'distance'

This error occurs when you try to access the "distance" attribute of a QPointF object in PyQt5. However, QPointF objects do not have a "distance" attribute.

To calculate the distance between two QPointF objects, you can use the "pythagorean theorem" formula:

distance = sqrt((x2 - x1)^2 + (y2 - y1)^2)

Here's an example code snippet to calculate the distance between two QPointF objects:

from PyQt5.QtCore import QPointF
import math

# create two QPointF objects
point1 = QPointF(0, 0)
point2 = QPointF(3, 4)

# calculate the distance between the two points
distance = math.sqrt((point2.x() - point1.x())**2 + (point2.y() - point1.y())**2)

print(distance) # output: 5.0

In this example, we import the QPointF class from PyQt5.QtCore, create two QPointF objects, and calculate the distance between them using the formula. Finally, we print the distance to the console.