def spider_opened(self, spider):
        file_to_save = open(spider.name % 'exports/csv/%s.csv', 'w+b')
        self.files[spider] = file_to_save
        self.exporter = CsvItemExporter(file_to_save)
        self.exporter.start_exporting()
dataset/ETHPy150Open kirankoduru/arachne/arachne/pipelines.py/ExportCSV.spider_opened/swapped operands of `%`