Great Expectations的博客

Scrapy Engine(引擎): 负责Spider、ItemPipeline、Downloader、Scheduler中间的通讯，信号、数据传递等。 Scheduler(调度器): 它负责接受引擎发送过来的Request请求，并按照一定的方式进行整理排列，入队，当引擎需要时，交还给引擎。 Downloader（下载器）：负责下载Scrapy Engine(引擎)发送...

# -*- coding: utf-8 -*- # Scrapy settings for demo1 project## For simplicity, this file contains only settings considered important or# commonly used. You can find more settings consulting the d...

# -*- coding: utf-8 -*-# Define your item pipelines here## Don't forget to add your pipeline to the ITEM_PIPELINES setting# See: http://doc.scrapy.org/en/latest/topics/item-pipeline.htmlfrom s...