创建项目
1、pip install scrapy
2、scrapy startproject house_spider
3、成功
    New Scrapy project 'house_spider', using template directory '/home/tang/.virtualenvs/house/lib/python3.6/site-packages/scrapy/templates/project', created in:
        /home/tang/Desktop/house/house_spider
        
    You can start your first spider with:
        cd house_spider
        scrapy genspider example example.com

4、进入并创建爬虫文件
        cd house_spider
        scrapy genspider fang fang.com
        
            Created spider 'fang' using template 'basic' in module:
            house_spider.spiders.fang