1schema = Schema( 2    And({ 3        Optional("title", default=""): And( 4            [str], 5            Use(lambda x: x[0]), 6            lambda x: len(x) < 200, 7            error="\"title\" should be a string less than 200 characters long."), 8        Optional("language", default="autodetect"): And( 9            [str],10            Use(lambda x: x[0]),11            Use(lambda x: ALIAS_DICT.get(x, "autodetect")),12            error="\"language\" should be the name of a supported language."),13        Optional("duration", default=1440): And(14            [str],15            Use(lambda x: int(x[0])),16            lambda x: x > 0, Use(lambda x: min(x, 43200)),17            error="\"duration\" should be an integer number of minutes before the paste is deleted."),18        Optional("api_key", default=None):19            Use(lambda x: User.objects.get(api_key=x[0]), error="\"api_key\" must be a valid API key."),20        },21        # Make a named tuple out of the result.22        Use(lambda x: namedtuple('GenericDict', x.keys())(**x))23        )24)