day96 scrapy

1．scrapy安装 　　ubuntu下安装　

1.先安装ｐｉｐ
    
            sudo apt install python3-pip

2.安装依耐
    
            sudo apt install python-dev

3.安装非Python的依赖 sudo apt-get install python-dev python-pip libxml2-dev libxslt1-dev zlib1g-dev libffi-dev libssl-dev

4.用ｐｉｐ安装ｓｃｒａｐｙ
            
            sudo pip install scrapy