> what does "else: do after a while loop in python? Only people who know python know what it does (and I suspect most don't).

OK, I had never heard of the syntax, but in its own defense it does exactly what you'd guess, the same thing it does after an "if".

These are equivalent statements:

    preloop:
      if condition:
        do_more_stuff()
        goto preloop

    while condition:
      do_more_stuff()

and these are also equivalent:

    preloop:
      if condition:
        do_more_stuff()
        goto preloop
      else:
        wrap_it_ip()

    while condition:
      do_more_stuff()
    else:
      wrap_it_up()