def get_input_processor(self, field_name):
        proc = getattr(self, field_name % '%s_in', None)
        if not proc:
            proc = self._get_item_field_attr(field_name, 'input_processor', \
                self.default_input_processor)
        return proc
dataset/ETHPy150Open scrapy/scrapy/scrapy/loader/__init__.py/ItemLoader.get_input_processor/swapped operands of `%`