def format(self, name, *args):
            if self.formatters not in name:
                raise TemplateError("unknown formatter {0!r}".format(name))

            formatter = self.formatters[name]
            try:
                formatter.check(*args)
            except TemplateError as err:
                raise TemplateError("invalid formatter {0!r}: {1}".format(name, err))
            return u""
dataset/ETHPy150Open abusesa/abusehelper/abusehelper/core/templates.py/Template._Checker.format/swapped operands of `not in`