On Apr 22, 8:23 pm, [EMAIL PROTECTED] (Alex Martelli) wrote: > Steven Bethard <[EMAIL PROTECTED]> wrote: > > ... > > > > > >>>>> import sys > > >>>>> def ch4(item, n=0): > > >>>>> if n < len(item): > > >>>>> if item[n] == '0': > > >>>>> item[n] = '1' > > >>>>> print ''.join(item) > > >>>>> ch4(item) > > >>>>> elif item[n] == '1': > > >>>>> item[n] = '0' > > >>>>> ch4(item, n+1) > > >>>>> ch4(list(sys.argv[1])) > ... > > > for interest sake: is my method unredeemable? > > > Let's just say that I don't currently see an obvious way of redeeming > > it. ;-) > > Change the outer if into a while, and the recursive calls into proper > assignments to n. They're both tail-recursive calls, so this won't > change the semantics, as it happens. > > Alex
really helpful! thank you very much! proctor. -- http://mail.python.org/mailman/listinfo/python-list
