[RogerL]

See, I don't find that clearer; quite the reverse. With trailing 'or' the type variable is nicely lined up, and the pattern matching that is going on is a lot clearer to my eye. With things misaligned, I have to much more carefully parse the text to see what is going on. I sometimes even do something like this (probably overkill in this example, but my aim is to illustrate a concept, not to bicker about the best expression of that particular statement):

   return (
    (type == KIS_ES_NAGYKER                   ) or
    (type == KISKER         and not is_nagyker) or
    (type == NAGYKER        and     is_nagyker))

[meowface]

Yours is more aesthetically pleasing, but being able to see the "or" quickly helps one understand the nature of the full conditional at first glance.

The other reply to you seems to be the best of both worlds.

[abecedarius]

    def is_file_for(is_nagyker, type):
         return (   (type == KIS_ES_NAGYKER)
                 or (type == KISKER and not is_nagyker)
                 or (type == NAGYKER and is_nagyker))

[meowface]

Or maybe

    def is_file_for(is_nagyker, type):
         return (
                    (type == KIS_ES_NAGYKER)
                 or (type == KISKER and not is_nagyker)
                 or (type == NAGYKER and is_nagyker)
                )