Traceback (most recent call last):
File "./prog.py", line 10, in <module>
File "./prog.py", line 6, in hanoi
File "./prog.py", line 6, in hanoi
File "./prog.py", line 6, in hanoi
[Previous line repeated 995 more times]
File "./prog.py", line 2, in hanoi
RecursionError: maximum recursion depth exceeded in comparison