代码：

   def __init__(self,url):
        self.url = url
        self.log = mylog()
        self.pageSum = 5
        self.urls = self.getUrls(self.pageSum)
        self.items = self.spider(self.urls)
        self.pipelines(self.items)

构造函数是引用了 self.getUrls、self.spider、self.pipelines 三个方法？
还是引用了三个方法中的 self.pageSum、self.urls、self.items 三个参数，还是其他？请教！
一直对类不清晰。

具体代码见下：

import requests
from bs4 import BeautifulSoup
from mylog import MyLog as mylog
import xlwt


class Item(object):
    title = None    #帖子标题
    firstAuthor = None  #帖子创建者
    firstTime = None   #帖子创建时间
    reNum = None    #总回复数
    content = None  #最后回复内容
    lastAuthor = None   #最后回复者
    lastTime = None #最后回复时间
    

class GetTiebaInfo(object):
    def __init__(self,url):
        self.url = url
        self.log = mylog()
        self.pageSum = 5
        self.urls = self.getUrls(self.pageSum)
        self.items = self.spider(self.urls)
        self.pipelines(self.items)
        
    def getUrls(self,pageSum):
        urls = []
        # 省略...
        return urls

    def spider(self, urls):
        items = []
        # 省略...
        return items
    
    def pipelines(self, items):
        # 省略...
      
      
if __name__ == '__main__':
    url = 'http://tieba.baidu.com/f?kw=%E6%9D%83%E5%88%A9%E7%9A%84%E6%B8%B8%E6%88%8F&ie=utf-8&pn=50'
    GTI = GetTiebaInfo(url)