I implemented this -> http://www.apl.jhu.edu/~hall/lisp/Hanoi.lisp in both flavors of Python: 2.6.2 and 3.0.1 (CPython)
The code: #!/usr/bin/env python def remaining_peg (peg1, peg2): return (6 - peg1 - peg2) def hanoi (num_discs, start, end): if (1 == num_discs): print "Top of peg {0} to peg {1}".format(start,end) # used print() for Py 3.0.1 else: hanoi ((num_discs - 1), start, (remaining_peg (start, end))) hanoi (1, start, end) hanoi ((num_discs - 1), (remaining_peg (start, end)), end) hanoi(20,2,3) The times: real usr sys Python 2.6.2 7.994s 3.336s 3.296s Python 3.0.1 55.302s 38.024s 5.876s What happened to Python? -- http://mail.python.org/mailman/listinfo/python-list