def dropdown_reconfigure(self, name, **kwargs):
        """
        reconfigure the named DropDown configuration.
        Note that changed attributes only have an effect on spawning the window.
        """
        if name not in self._dropdownconfig:
            return
        dd = self._dropdownconfig[name]
        for attr, value in kwargs.items():
            if hasattr(dd, attr):
                setattr(dd, attr, value)

        reconfigure the named DropDown configuration.
        Note that changed attributes only have an effect on spawning the window.
        
libqtile/scratchpad.py