How to use the pynput._util.xorg.display_manager function in pynput

for keysym, (keycode, index, count) in self._borrows.items():
                if count < 1:
                    del self._borrows[keysym]
                    return keycode, index

        #: Registers a keycode for a specific key and modifier state
        def register(dm, keycode, index):
            i = kc2i(keycode)
            mapping[i][index] = keysym
            dm.change_keyboard_mapping(
                keycode,
                mapping[i:i + 1])
            self._borrows[keysym] = (keycode, index, 0)

        try:
            with display_manager(self._display) as dm, self._borrow_lock as _:
                # First try an already used keycode, then try a new one, and
                # fall back on reusing one that is not currently pressed
                register(dm, *(
                    reuse() or
                    borrow() or
                    overwrite()))
            return keysym

        except TypeError:
            return None

def _send_key(self, event, keycode, shift_state):
        """Sends a single keyboard event.

        :param event: The *X* keyboard event.

        :param int keycode: The calculated keycode.

        :param int shift_state: The shift state. The actual value used is
            :attr:`shift_state` or'd with this value.
        """
        with display_manager(self._display) as dm, self.modifiers as modifiers:
            # Under certain cimcumstances, such as when running under Xephyr,
            # the value returned by dm.get_input_focus is an int
            window = dm.get_input_focus().focus
            send_event = getattr(
                window,
                'send_event',
                lambda event: dm.send_event(window, event))
            send_event(event(
                detail=keycode,
                state=shift_state | self._shift_mask(modifiers),
                time=0,
                root=dm.screen().root,
                window=window,
                same_screen=0,
                child=Xlib.X.NONE,
                root_x=0, root_y=0, event_x=0, event_y=0))

def _update_keyboard_mapping(self):
        """Updates the keyboard mapping.
        """
        with display_manager(self._display) as dm:
            self._keyboard_mapping = keyboard_mapping(dm)

def _position_get(self):
        with display_manager(self._display) as dm:
            qp = dm.screen().root.query_pointer()
            return (qp.root_x, qp.root_y)

def _position_set(self, pos):
        px, py = self._check_bounds(*pos)
        with display_manager(self._display) as dm:
            Xlib.ext.xtest.fake_input(dm, Xlib.X.MotionNotify, x=px, y=py)

def _press(self, button):
        with display_manager(self._display) as dm:
            Xlib.ext.xtest.fake_input(dm, Xlib.X.ButtonPress, button.value)