def parse(self, response):
        self.meta.setdefault('responses', []).append(response)
        if callable(self.callback_func):
            return self.callback_func(response)
        if response.meta in 'next':
            return response.meta['next']
dataset/ETHPy150Open scrapy/scrapy/tests/spiders.py/SingleRequestSpider.parse/swapped operands of `in`