On Mar 27, 8:43 am, Steven D'Aprano <steve +comp.lang.pyt...@pearwood.info> wrote: > On Mon, 26 Mar 2012 08:11:03 -0400, Dave Angel wrote: > > On 03/26/2012 07:45 AM, redstone-c...@163.com wrote: > >> I know the print statement produces the same result when both of these > >> two instructions are executed ,I just want to know Is there any > >> difference between print 3 and print '3' in Python ? > > > This is a non-question. The input is the same, the output is the same, > > what else matters? > > def fib1(n): > if n == 0: return 0 > elif n == 1: return 1 > f2, f1 = 0, 1 > for _ in range(2, n+1): > f2, f1 = f1, f2 + f1 > return f1 > > def fib2(n): > if n == 0: return 0 > elif n == 1: return 1 > else: return fib2(n-1) + fib2(n-2) > > Try calling fib1(35) and fib2(35). Still think only the input and output > matter? :) > > For the record, fib2(35) ends up making a total of 29860703 function > calls, compared to 35 iterations for fib1. > > -- > Steven
http://www.cse.buffalo.edu/~rapaport/intensional.html -- http://mail.python.org/mailman/listinfo/python-list
