How to use the xcffib.xproto.WindowError function in xcffib

def manage(self, w):
        try:
            attrs = w.get_attributes()
            internal = w.get_property("QTILE_INTERNAL")
        except (xcffib.xproto.WindowError, xcffib.xproto.AccessError):
            return
        if attrs and attrs.override_redirect:
            return

        if w.wid not in self.windows_map:
            if internal:
                try:
                    c = window.Internal(w, self)
                except (xcffib.xproto.WindowError, xcffib.xproto.AccessError):
                    return
                self.windows_map[w.wid] = c
            else:
                try:
                    c = window.Window(w, self)
                except (xcffib.xproto.WindowError, xcffib.xproto.AccessError):
                    return

                if w.get_wm_type() == "dock" or c.strut:
                    c.static(self.current_screen.index)
                else:
                    hook.fire("client_new", c)

                # Window may be defunct because
                # it's been declared static in hook.
                if c.defunct:

def add(self, win, focus=True, force=False):
        hook.fire("group_window_add")
        self.windows.add(win)
        win.group = self
        try:
            if 'fullscreen' in win.window.get_net_wm_state() and \
                    self.qtile.config.auto_fullscreen:
                win._float_state = window.FULLSCREEN
            elif self.floating_layout.match(win):
                # !!! tell it to float, can't set floating
                # because it's too early
                # so just set the flag underneath
                win._float_state = window.FLOATING
        except (xcffib.xproto.WindowError, xcffib.xproto.AccessError):
            pass  # doesn't matter
        if win.floating:
            self.floating_layout.add(win)
        else:
            for i in self.layouts:
                i.add(win)
        if focus:
            self.focus(win, warp=True, force=force)

def scan(self) -> None:
        """Scan for existing windows"""
        assert self.qtile is not None

        _, _, children = self._root.query_tree()
        for item in children:
            try:
                attrs = item.get_attributes()
                state = item.get_wm_state()
            except (xcffib.xproto.WindowError, xcffib.xproto.AccessError):
                continue

            if attrs and attrs.map_state == xcffib.xproto.MapState.Unmapped:
                continue
            if state and state[0] == window.WithdrawnState:
                continue
            self.qtile.manage(item)

def group(self, group):
        if group:
            try:
                self.window.set_property(
                    "_NET_WM_DESKTOP",
                    self.qtile.groups.index(group)
                )
            except xcffib.xproto.WindowError:
                logger.exception("whoops, got error setting _NET_WM_DESKTOP, too early?")
        self._group = group

except TypeError:
            # the value wasn't an iterable and wasn't a string, so let's
            # wrap it.
            value = [value]

        try:
            self.conn.conn.core.ChangePropertyChecked(
                xcffib.xproto.PropMode.Replace,
                self.wid,
                self.conn.atoms[name],
                self.conn.atoms[type],
                format,  # Format - 8, 16, 32
                len(value),
                value
            ).check()
        except xcffib.xproto.WindowError:
            logger.warning(
                'X error in SetProperty (wid=%r, prop=%r), ignoring',
                self.wid, name)