Python

from PySide6.QtWidgets import QDockWidget, QWidget, QToolButton, QStyle, QHBoxLayout, QStyleFactory, QSizePolicy, \
    QApplication, QVBoxLayout, QLabel, QSlider, QMainWindow, QSizeGrip

No code should be more than 80 characters UNLESS it's unavoidable like with a long regex. Hard limit is normally 88 characters.

Should be

from PySide6.QtWidgets import (
    QDockWidget,
    QWidget,
    QToolButton,
    QStyle,
    QHBoxLayout,
    QStyleFactory,
    QSizePolicy,
    QApplication,
    QVBoxLayout,
    QLabel,
    QSlider,
    QMainWindow,
    QSizeGrip,
)

Or add parenthesis and the last comma. black will reformat it. Then use isort to fix imports ordering.

Get that you are sharing this as a gist. Normally code like this is broken up into multiple modules so it's easier on the eyes and less going on.