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 -- http://mail.python.org/mailman/listinfo/python-list
