How to make QCheckBox active one of the group or disable all?

Question

Programming

Generally there are some QCheckBox.
For convenience, I combined them into QButtonGroup.
While it works like this, when you click on one, the previous one subsides, i.e. only one checkbox is active. But when you click on the same QButtonGroup again, the checkmark does not disappear. those. One is ALWAYS active.
It is necessary that one or no checkmarks be active. Is it possible to somehow set this up in QButtonGroup or in QGroupBox ?

Answer 1

There is a suspicion that catching, processing and setting checked / unchecked for everyone. For if ButtonGroup implies that at least one option must be selected.