def change_filepath(self):
        """Pick new path and update label using it."""
        ### pick new path
        paths = select_paths(caption="Select session data file to play")

        ### if paths were given, there can only be one,
        ### it should be used as the new filepath

        if paths:
            self.filepath_label.set(str(paths[0]))
Pick new path and update label using it.
nodezator/editing/playback/play.py