請問在類里怎么調(diào)用類的函數(shù)，比如我這么寫
class DailishiyanDownloaderMiddleware(object):

# Not all methods need to be defined. If a method is not defined,
# scrapy acts as if the downloader middleware does not modify the
# passed objects.
def canshu(self):#數(shù)據(jù)庫返回數(shù)據(jù)在這個函數(shù)
    aa=["192.168.1.2","11.22.33","44,55,66"]
    return aa
b=canshu(1)
print("我在函數(shù)外",b)
def order(self):#將返回數(shù)據(jù)按順序輸出
    print("我來自order")
    for i in range(10):
        yield i
a=order(1)
@classmethod
def from_crawler(cls, crawler):
    # This method is used by Scrapy to create your spiders.
    s = cls()
    crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
    return s
    ........

就能正常輸出，但我如果這么寫，就會報錯AttributeError: 'int' object has no attribute 'canshu'
class DailishiyanDownloaderMiddleware(object):

# Not all methods need to be defined. If a method is not defined,
# scrapy acts as if the downloader middleware does not modify the
# passed objects.
def canshu(self):#數(shù)據(jù)庫返回數(shù)據(jù)在這個函數(shù)
    aa=["192.168.1.2","11.22.33","44,55,66"]
    return aa
b=canshu(1)
#print("我在函數(shù)外",b)
def order(self):#將返回數(shù)控按順序輸出Ss
    print("我來自order",self.canshu())
    for i in range(10):
        yield i
a=order(1)
@classmethod
def from_crawler(cls, crawler):
    # This method is used by Scrapy to create your spiders.
    s = cls()
    crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
    return s
    ......
 省略的部分是scrapy框架的默認(rèn)代碼,基本沒有更改
 毫無頭緒的bug，求幫助，感謝