This might be completely trivial, but can someone explain to me how one Python idiom is not to mix tabs and spaces, and another is to align arguments over several lines when needed like this:

  def __init__(self, first, second, third,
               fourth, fifth, sixth):

I see similar examples elsewhere, and I don't see how you can achieve the alignment without mixing in spaces - at least in some cases. I, too, prefer to align arguments, but it looks bad in places like GitHub and Pastebin, when my Sublime Tex-written code gets uploaded.

Am I missing something here? The two just seem mutually exclusive in most cases (where the alignment position's required spaces % 4 != 0. Is the indentation done with just spaces then?