“Third, and perhaps most subtle, the display methods also have the potential to trigger infinite recursion loops in rare contexts — because some objects’ displays include displays of other objects, it’s not impossible that a display may trigger a display of an object being displayed, and thus loop. This is rare and obscure enough to skip here, but watch for an example of this looping potential to appear for these methods in a note near the end of the next chapter in its listinherited.py example’s class, where __repr__ can loop.”