Python报错： AttributeError: ‘Spider2107Pipeline‘ object has no attribute ‘wb‘

import openpyxl

class Spider2107Pipeline:

    def __int__(self):
        self.wb = openpyxl.Workbook()
        self.ws = self.wb.active
        self.ws.title = 'Top250'
        self.ws.append(('标题','评分','主题'))

    def open_spider(self,spider):
        pass

    def close_spider(self,spider):
        self.wb.save('电影数据.xlsx')

    def process_item(self, item, spider):
        title = item.get('title','')
        rank = item.get('rank','')
        subject = item.get('subject','')
        self.ws.append((title,rank,subject))
        return item

怎么解决这个报错的问题呀？

AttributeError: 'Spider2107Pipeline' object has no attribute 'wb'