def refresh_psd(self, z=None):
        if self.need_refresh:
            try:
                self.canvas.draw()
                self.need_refresh = False
            except IndexError as err_idx:
                print("Warning:", err_idx)
        self.tk_root.after(2000, self.refresh_psd)
Get all of the IDs for the related models.
dataset/ETHPy150Open ericgibert/supersid/supersid/tksidviewer.py/tkSidViewer.refresh_psd--crossover with--dataset/ETHPy150Open sdispater/orator/orator/orm/relations/belongs_to_many.py/BelongsToMany.get_related_ids