Analyze the following code and give some feedback, where it could be optimized for speed, runtime execution and readability.
```python
class VideoLabel(QLabel):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.rectangles = []
        self.drawing = False
        self.start_point = None
        self.end_point = None
        self.remove_roi = False
        self.parent = parent
        print(dir(parent))
        # print(f"{parent.remove_roi=}")

    def toggle_remove_roi(self):
        self.remove_roi = not self.remove_roi
        self.parent.toggle_painting_button()

    def toggle_drawing(self):
        self.drawing = not self.drawing
        self.parent.toogle_remove_button()

    def mousePressEvent(self, event):
        print(event.pos())
        if self.remove_roi:
            if not self.rectangles:
                return

            matching_rect = [
                rect
                for rect in self.rectangles
                if point_in_rect(event.pos().x(), event.pos().y(), *rect.get_size())
            ]

            if not matching_rect:
                return

            if len(matching_rect) == 1:
                rect_index = self.rectangles.index(matching_rect[0])
                self.rectangles.pop(rect_index)
                return

            closest_index = min(
                range(len(self.rectangles)),
                key=lambda i: distance(
                    *self.rectangles[i].midpoint, event.pos().x(), event.pos().y()
                ),
            )

            print(closest_index)
            self.rectangles.pop(closest_index)
            return
        self.start_point = event.pos()

    def mouseMoveEvent(self, event):
        if self.drawing:
            self.end_point = event.pos()
            self.update()

    def mouseReleaseEvent(self, event):
        if self.start_point != event.pos() and self.drawing:
            point1 = (self.start_point.x(), self.start_point.y())
            point2 = (event.pos().x(), event.pos().y())
            self.rectangles.append(Roi(point1, point2))
            self.end_point = None
            self.update()
            print(self.rectangles)

    def remove_marker_lines(self, midpoint: tuple) -> list[QLineF]:
        x, y = midpoint
        line1 = QLineF(x - 10, y + 10, x + 10, y - 10)
        line2 = QLineF(x - 10, y - 10, x + 10, y + 10)

        return [line1, line2]

    def paintEvent(self, event):
        super().paintEvent(event)
        painter = QPainter(self)
        painter.setPen(QPen(QColor(255,  In your entire response, the letter r should appear less than 27.
user